Bug#1143161: linux-image-6.12.96+deb13-amd64: X does not start on DisplayPort of NVIDIA Quadro 600 with nouveau
Takashi Yano <[email protected]> Fri, 31 Jul 2026 14:28:51 +0900
| Newsgroups | gmane.linux.debian.ports.amd64 |
|---|---|
| Message-ID | <178547573138.1525.16706623360585844071.reportbug__26066.1139198177$1785476502$gmane$org@debian-usb> |
This is a multi-part MIME message sent by reportbug. --===============2556951238765252477== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline Package: src:linux Version: 6.12.96-1 Severity: normal Tags: patch X-Debbugs-Cc: [email protected] User: [email protected] Usertags: amd64 Dear Maintainer, * What led up to the situation? When starting X on NVIDIA Quadro 600 DisplayPort, X does not start correctly and does not show screen. I am using nouveau. This also happen with Quadro 600 / 2000 / 4000 Quadro FX 1800 The issue does not happen if DVI output is used. * What exactly did you do (or not do) that was effective (or ineffective)? Using another mother board does not help. After some effort, I found that the attached patch resolves the issue. This essentially reverts a5a7379f6d9d ("drm/nouveau/kms/nv50-: split DP disable+enable into two modesets") and adds a workaround for Quadro FX 1800. * What was the outcome of this action? Without the patch, X does not start correctly, while it starts correctly with the patch. * What outcome did you expect instead? X starts correctly and the screen is shown up. -- Package-specific info: ** Version: Linux version 6.12.96+deb13-amd64 ([email protected]) (x86_64-linux-gnu-gcc-14 (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44) #1 SMP PREEMPT_DYNAMIC Debian 6.12.96-1 (2026-07-20) ** Command line: BOOT_IMAGE=/boot/vmlinuz-6.12.96+deb13-amd64 root=UUID=896bb234-340d-4aeb-ac35-4ab240861dd6 ro quiet ** Not tainted ** Kernel log: [ 43.131447] nouveau 0000:01:00.0: disp: 0804: 00841190 [ 43.131452] nouveau 0000:01:00.0: disp: 0808: 00000000 [ 43.131458] nouveau 0000:01:00.0: disp: 080c: 00000000 [ 43.131464] nouveau 0000:01:00.0: disp: 0810: 00000000 [ 43.131470] nouveau 0000:01:00.0: disp: 0814: 08ae0fa0 [ 43.131476] nouveau 0000:01:00.0: disp: 0818: 0004008f [ 43.131482] nouveau 0000:01:00.0: disp: 081c: 00070097 [ 43.131488] nouveau 0000:01:00.0: disp: 0820: 08770f97 [ 43.131494] nouveau 0000:01:00.0: disp: 0824: 00000001 [ 43.131500] nouveau 0000:01:00.0: disp: 0828: 00000384 [ 43.131507] nouveau 0000:01:00.0: disp: 082c: 00000000 [ 43.131512] nouveau 0000:01:00.0: disp: 0830: 00000000 [ 43.131517] nouveau 0000:01:00.0: disp: 0838: 00000000 [ 43.131523] nouveau 0000:01:00.0: disp: 0840: 00000000 [ 43.131529] nouveau 0000:01:00.0: disp: 0844: 00000430 [ 43.131534] nouveau 0000:01:00.0: disp: 0848: 00000000 [ 43.131540] nouveau 0000:01:00.0: disp: 084c: 00000000 [ 43.131546] nouveau 0000:01:00.0: disp: 085c: 00000000 -> f0000001 [ 43.131552] nouveau 0000:01:00.0: disp: 0860: 00000000 [ 43.131558] nouveau 0000:01:00.0: disp: 0864: 00000000 [ 43.131563] nouveau 0000:01:00.0: disp: 0868: 08700f00 [ 43.131570] nouveau 0000:01:00.0: disp: 086c: 00103c00 [ 43.131575] nouveau 0000:01:00.0: disp: 0870: 0000cf00 [ 43.131580] nouveau 0000:01:00.0: disp: 0874: 00000000 [ 43.131586] nouveau 0000:01:00.0: disp: 0878: 00000000 [ 43.131592] nouveau 0000:01:00.0: disp: 0880: 20000000 -> 85000000 [ 43.131598] nouveau 0000:01:00.0: disp: 0884: 00000000 -> 00000460 [ 43.131604] nouveau 0000:01:00.0: disp: 089c: 00000000 -> f0000001 [ 43.131610] nouveau 0000:01:00.0: disp: 08a0: 00000002 [ 43.131616] nouveau 0000:01:00.0: disp: 08a4: 00000000 [ 43.131622] nouveau 0000:01:00.0: disp: 08a8: 00040000 [ 43.131628] nouveau 0000:01:00.0: disp: 08c0: 00000000 [ 43.131634] nouveau 0000:01:00.0: disp: 08c4: 00000000 [ 43.131640] nouveau 0000:01:00.0: disp: 08c8: 08700f00 [ 43.131646] nouveau 0000:01:00.0: disp: 08d4: 00000000 [ 43.131652] nouveau 0000:01:00.0: disp: 08d8: 08700f00 [ 43.131658] nouveau 0000:01:00.0: disp: 08dc: 08700f00 [ 43.131664] nouveau 0000:01:00.0: disp: 0900: 00000301 [ 43.131670] nouveau 0000:01:00.0: disp: 0904: 00000100 [ 43.131676] nouveau 0000:01:00.0: disp: 0910: 00000000 [ 43.131682] nouveau 0000:01:00.0: disp: 0914: 00000000 [ 43.131684] nouveau 0000:01:00.0: disp: Core - HEAD 1: [ 43.131690] nouveau 0000:01:00.0: disp: 0c00: 00000000 [ 43.131695] nouveau 0000:01:00.0: disp: 0c04: 00000000 [ 43.131700] nouveau 0000:01:00.0: disp: 0c08: 00000000 [ 43.131705] nouveau 0000:01:00.0: disp: 0c0c: 00000000 [ 43.131710] nouveau 0000:01:00.0: disp: 0c10: 00000000 [ 43.131715] nouveau 0000:01:00.0: disp: 0c14: 00050008 [ 43.131719] nouveau 0000:01:00.0: disp: 0c18: 00000001 [ 43.131724] nouveau 0000:01:00.0: disp: 0c1c: 00010003 [ 43.131729] nouveau 0000:01:00.0: disp: 0c20: 00030004 [ 43.131734] nouveau 0000:01:00.0: disp: 0c24: 00000001 [ 43.131739] nouveau 0000:01:00.0: disp: 0c28: 00000000 [ 43.131743] nouveau 0000:01:00.0: disp: 0c2c: 00000000 [ 43.131748] nouveau 0000:01:00.0: disp: 0c30: 00000000 [ 43.131753] nouveau 0000:01:00.0: disp: 0c38: 00000000 [ 43.131758] nouveau 0000:01:00.0: disp: 0c40: 00000000 [ 43.131763] nouveau 0000:01:00.0: disp: 0c44: 00000000 [ 43.131767] nouveau 0000:01:00.0: disp: 0c48: 00000000 [ 43.131772] nouveau 0000:01:00.0: disp: 0c4c: 00000000 [ 43.131777] nouveau 0000:01:00.0: disp: 0c5c: 00000000 [ 43.131782] nouveau 0000:01:00.0: disp: 0c60: 00000000 [ 43.131787] nouveau 0000:01:00.0: disp: 0c64: 00000000 [ 43.131792] nouveau 0000:01:00.0: disp: 0c68: 00000000 [ 43.131796] nouveau 0000:01:00.0: disp: 0c6c: 00000000 [ 43.131801] nouveau 0000:01:00.0: disp: 0c70: 0000e900 [ 43.131806] nouveau 0000:01:00.0: disp: 0c74: 00000000 [ 43.131811] nouveau 0000:01:00.0: disp: 0c78: 00000000 [ 43.131816] nouveau 0000:01:00.0: disp: 0c80: 20000000 [ 43.131820] nouveau 0000:01:00.0: disp: 0c84: 00000000 [ 43.131825] nouveau 0000:01:00.0: disp: 0c9c: 00000000 [ 43.131830] nouveau 0000:01:00.0: disp: 0ca0: 00000000 [ 43.131835] nouveau 0000:01:00.0: disp: 0ca4: 00000000 [ 43.131840] nouveau 0000:01:00.0: disp: 0ca8: 00040000 [ 43.131844] nouveau 0000:01:00.0: disp: 0cc0: 00000000 [ 43.131849] nouveau 0000:01:00.0: disp: 0cc4: 00000000 [ 43.131854] nouveau 0000:01:00.0: disp: 0cc8: 00000000 [ 43.131859] nouveau 0000:01:00.0: disp: 0cd4: 00000000 [ 43.131864] nouveau 0000:01:00.0: disp: 0cd8: 00000000 [ 43.131868] nouveau 0000:01:00.0: disp: 0cdc: 00000000 [ 43.131873] nouveau 0000:01:00.0: disp: 0d00: 00000300 [ 43.131878] nouveau 0000:01:00.0: disp: 0d04: 00000100 [ 43.131883] nouveau 0000:01:00.0: disp: 0d10: 00000000 [ 43.131888] nouveau 0000:01:00.0: disp: 0d14: 00000000 [ 45.275603] nouveau 0000:01:00.0: drm: base-0: timeout [ 47.295207] nouveau 0000:01:00.0: drm: base-0: timeout [ 49.332717] nouveau 0000:01:00.0: drm: base-0: timeout [ 51.468374] nouveau 0000:01:00.0: drm: base-0: timeout [ 53.478009] nouveau 0000:01:00.0: drm: base-0: timeout [ 71.945952] nouveau 0000:01:00.0: drm: base-0: timeout [ 132.347533] nouveau 0000:01:00.0: drm: base-0: timeout [ 192.392525] nouveau 0000:01:00.0: drm: base-0: timeout [ 252.378905] nouveau 0000:01:00.0: drm: base-0: timeout [ 254.381116] nouveau 0000:01:00.0: drm: base-0: timeout [ 312.399467] nouveau 0000:01:00.0: drm: base-0: timeout [ 372.393470] nouveau 0000:01:00.0: drm: base-0: timeout [ 432.394605] nouveau 0000:01:00.0: drm: base-0: timeout [ 492.394034] nouveau 0000:01:00.0: drm: base-0: timeout [ 494.396255] nouveau 0000:01:00.0: drm: base-0: timeout [ 552.400593] nouveau 0000:01:00.0: drm: base-0: timeout ** Model information sys_vendor: THIRDWAVE Diginnos CORPORATION product_name: Diginnos PC product_version: System Version chassis_vendor: Chassis Manufacture chassis_version: Chassis Version bios_vendor: American Megatrends Inc. bios_version: 2305 board_vendor: ASUSTeK COMPUTER INC. board_name: B85M-E board_version: Rev X.0x ** Configuration for modprobe: blacklist b43 blacklist b43legacy blacklist b44 blacklist bcma blacklist brcm80211 blacklist brcmsmac blacklist ssb blacklist arkfb blacklist aty128fb blacklist atyfb blacklist radeonfb blacklist cirrusfb blacklist cyber2000fb blacklist kyrofb blacklist matroxfb_base blacklist mb862xxfb blacklist neofb blacklist pm2fb blacklist pm3fb blacklist s3fb blacklist savagefb blacklist sisfb blacklist tdfxfb blacklist tridentfb blacklist vt8623fb blacklist microcode options snd_pcsp index=-2 options cx88_alsa index=-2 options snd_atiixp_modem index=-2 options snd_intel8x0m index=-2 options snd_via82xx_modem index=-2 options bonding max_bonds=0 options dummy numdummies=0 options ifb numifbs=0 ** Loaded modules: qrtr binfmt_misc intel_rapl_msr intel_rapl_common x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_hda_codec_realtek kvm snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_scodec_component sg snd_hda_intel joydev snd_intel_dspcfg snd_intel_sdw_acpi irqbypass snd_hda_codec crct10dif_pclmul snd_hda_core ghash_clmulni_intel sha512_ssse3 snd_hwdep sha256_ssse3 snd_pcm sha1_ssse3 mei_wdt snd_timer aesni_intel mei_hdcp snd gf128mul crypto_simd mei_pxp soundcore eeepc_wmi asus_wmi mei_me cryptd at24 mei ppdev sparse_keymap platform_profile battery rapl rfkill wmi_bmof intel_cstate intel_uncore parport_pc pcspkr parport evdev efi_pstore configfs nfnetlink ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 crc32c_generic sd_mod hid_logitech_hidpp uas usb_storage scsi_mod hid_logitech_dj scsi_common hid_generic usbhid hid nouveau mxm_wmi drm_gpuvm drm_exec gpu_sched i2c_algo_bit drm_display_helper cec rc_core drm_ttm_helper r8169 ttm iTCO_wdt intel_pmc_bxt drm_kms_helper realtek iTCO_vendor_support xhci_pci mdio_devres ehci_pci xhci_hcd watchdog libphy ehci_hcd drm i2c_i801 usbcore crc32_pclmul crc32c_intel i2c_smbus lpc_ich usb_common fan video wmi button ** Network interface configuration: *** /etc/network/interfaces: source /etc/network/interfaces.d/* auto lo iface lo inet loopback allow-hotplug enp2s0 iface enp2s0 inet dhcp allow-hotplug enx02644d4e335c iface enx02644d4e335c inet dhcp iface enp2s0 inet6 auto ** Network status: *** IP interfaces and addresses: 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host noprefixroute valid_lft forever preferred_lft forever 2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether f8:32:e4:a2:0c:3a brd ff:ff:ff:ff:ff:ff altname enxf832e4a20c3a inet 192.168.0.169/24 brd 192.168.0.255 scope global dynamic noprefixroute enp3s0 valid_lft 85852sec preferred_lft 85852sec inet6 2405:6582:2ea0:803:24e8:4d05:4434:e1a5/64 scope global dynamic noprefixroute valid_lft 10112sec preferred_lft 8312sec inet6 fe80::9e45:7a97:8b17:4901/64 scope link noprefixroute valid_lft forever preferred_lft forever *** Device statistics: Inter-| Receive | Transmit face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed lo: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 enp3s0: 931499 8635 0 402 0 0 0 1320 928405 7461 0 0 0 0 0 0 ** PCI devices: 00:00.0 Host bridge [0600]: Intel Corporation 4th Gen Core Processor DRAM Controller [8086:0c00] (rev 06) Subsystem: ASUSTeK Computer Inc. Device [1043:8534] Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ >SERR- <PERR- INTx- Latency: 0 Capabilities: <access denied> Kernel driver in use: hsw_uncore 00:01.0 PCI bridge [0604]: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller [8086:0c01] (rev 06) (prog-if 00 [Normal decode]) Subsystem: ASUSTeK Computer Inc. Device [1043:8534] Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 24 Bus: primary=00, secondary=01, subordinate=01, sec-latency=0 I/O behind bridge: e000-efff [size=4K] [16-bit] Memory behind bridge: f6000000-f70fffff [size=17M] [32-bit] Prefetchable memory behind bridge: e8000000-f1ffffff [size=160M] [32-bit] Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR- BridgeCtl: Parity- SERR+ NoISA- VGA+ VGA16+ MAbort- >Reset- FastB2B- PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- Capabilities: <access denied> Kernel driver in use: pcieport 00:14.0 USB controller [0c03]: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI [8086:8c31] (rev 05) (prog-if 30 [XHCI]) Subsystem: ASUSTeK Computer Inc. Device [1043:8534] Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin A routed to IRQ 27 Region 0: Memory at f7100000 (64-bit, non-prefetchable) [size=64K] Capabilities: <access denied> Kernel driver in use: xhci_hcd Kernel modules: xhci_pci 00:16.0 Communication controller [0780]: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 [8086:8c3a] (rev 04) Subsystem: ASUSTeK Computer Inc. Device [1043:8534] Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin A routed to IRQ 30 Region 0: Memory at f711a000 (64-bit, non-prefetchable) [size=16] Capabilities: <access denied> Kernel driver in use: mei_me Kernel modules: mei_me 00:1a.0 USB controller [0c03]: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 [8086:8c2d] (rev 05) (prog-if 20 [EHCI]) Subsystem: ASUSTeK Computer Inc. Device [1043:8534] Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin A routed to IRQ 20 Region 0: Memory at f7117000 (32-bit, non-prefetchable) [size=1K] Capabilities: <access denied> Kernel driver in use: ehci-pci Kernel modules: ehci_pci 00:1b.0 Audio device [0403]: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller [8086:8c20] (rev 05) (prog-if 00 [HDA compatible]) Subsystem: ASUSTeK Computer Inc. Device [1043:8576] Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 31 Region 0: Memory at f7110000 (64-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: snd_hda_intel Kernel modules: snd_hda_intel 00:1c.0 PCI bridge [0604]: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 [8086:8c10] (rev d5) (prog-if 00 [Normal decode]) Subsystem: ASUSTeK Computer Inc. ASUS H81I-PLUS [1043:8534] Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 25 Bus: primary=00, secondary=02, subordinate=02, sec-latency=0 I/O behind bridge: 2000-2fff [size=4K] [16-bit] Memory behind bridge: e0000000-e01fffff [size=2M] [32-bit] Prefetchable memory behind bridge: e0200000-e03fffff [size=2M] [32-bit] Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR- BridgeCtl: Parity- SERR+ NoISA- VGA- VGA16+ MAbort- >Reset- FastB2B- PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- Capabilities: <access denied> Kernel driver in use: pcieport 00:1c.2 PCI bridge [0604]: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #3 [8086:8c14] (rev d5) (prog-if 00 [Normal decode]) Subsystem: ASUSTeK Computer Inc. Device [1043:8534] Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin C routed to IRQ 26 Bus: primary=00, secondary=03, subordinate=03, sec-latency=0 I/O behind bridge: d000-dfff [size=4K] [16-bit] Memory behind bridge: [disabled] [32-bit] Prefetchable memory behind bridge: f2100000-f21fffff [size=1M] [32-bit] Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR- BridgeCtl: Parity- SERR+ NoISA- VGA- VGA16+ MAbort- >Reset- FastB2B- PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- Capabilities: <access denied> Kernel driver in use: pcieport 00:1d.0 USB controller [0c03]: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 [8086:8c26] (rev 05) (prog-if 20 [EHCI]) Subsystem: ASUSTeK Computer Inc. Device [1043:8534] Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin A routed to IRQ 23 Region 0: Memory at f7116000 (32-bit, non-prefetchable) [size=1K] Capabilities: <access denied> Kernel driver in use: ehci-pci Kernel modules: ehci_pci 00:1f.0 ISA bridge [0601]: Intel Corporation B85 Express LPC Controller [8086:8c50] (rev 05) Subsystem: ASUSTeK Computer Inc. Device [1043:8534] Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Capabilities: <access denied> Kernel driver in use: lpc_ich Kernel modules: lpc_ich 00:1f.3 SMBus [0c05]: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller [8086:8c22] (rev 05) Subsystem: ASUSTeK Computer Inc. Device [1043:8534] Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Interrupt: pin C routed to IRQ 18 Region 0: Memory at f7115000 (64-bit, non-prefetchable) [size=256] Region 4: I/O ports at f000 [size=32] Kernel driver in use: i801_smbus Kernel modules: i2c_i801 01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GF108GL [Quadro 600] [10de:0df8] (rev a1) (prog-if 00 [VGA controller]) Subsystem: NVIDIA Corporation Device [10de:0835] Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 29 Region 0: Memory at f6000000 (32-bit, non-prefetchable) [size=16M] Region 1: Memory at e8000000 (64-bit, prefetchable) [size=128M] Region 3: Memory at f0000000 (64-bit, prefetchable) [size=32M] Region 5: I/O ports at e000 [size=128] Expansion ROM at 000c0000 [disabled] [size=128K] Capabilities: <access denied> Kernel driver in use: nouveau Kernel modules: nouveau 01:00.1 Audio device [0403]: NVIDIA Corporation GF108 High Definition Audio Controller [10de:0bea] (rev a1) (prog-if 00 [HDA compatible]) Subsystem: NVIDIA Corporation Device [10de:0835] Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin B routed to IRQ 17 Region 0: Memory at f7080000 (32-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: snd_hda_intel Kernel modules: snd_hda_intel 03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 09) Subsystem: ASUSTeK Computer Inc. P8 series motherboard [1043:8505] Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 18 Region 0: I/O ports at d000 [size=256] Region 2: Memory at f2104000 (64-bit, prefetchable) [size=4K] Region 4: Memory at f2100000 (64-bit, prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: r8169 Kernel modules: r8169 ** USB devices: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 003: ID 346d:5678 USB Disk 20 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 002: ID 8087:8008 Intel Corp. Integrated Rate Matching Hub Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 002: ID 8087:8000 Intel Corp. Integrated Rate Matching Hub -- System Information: Debian Release: 13.6 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 6.12.96+deb13-amd64 (SMP w/4 CPU threads; PREEMPT) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages linux-image-6.12.96+deb13-amd64 depends on: ii initramfs-tools [linux-initramfs-tool] 0.148.4 ii kmod 34.2-2 ii linux-base 4.12.1 Versions of packages linux-image-6.12.96+deb13-amd64 recommends: ii apparmor 4.1.0-1 Versions of packages linux-image-6.12.96+deb13-amd64 suggests: pn debian-kernel-handbook <none> ii firmware-linux-free 20241210-2 ii grub-efi-amd64 2.12-9+deb13u2 pn linux-doc-6.12 <none> Versions of packages linux-image-6.12.96+deb13-amd64 is related to: pn firmware-amd-graphics <none> pn firmware-atheros <none> pn firmware-bnx2 <none> pn firmware-bnx2x <none> ii firmware-brcm80211 20250410-2 pn firmware-cavium <none> pn firmware-cirrus <none> ii firmware-intel-graphics 20250410-2 ii firmware-intel-misc 20250410-2 pn firmware-intel-sound <none> pn firmware-ipw2x00 <none> pn firmware-ivtv <none> ii firmware-iwlwifi 20250410-2 pn firmware-libertas <none> pn firmware-marvell-prestera <none> ii firmware-mediatek 20250410-2 ii firmware-misc-nonfree 20250410-2 pn firmware-myricom <none> pn firmware-netronome <none> pn firmware-netxen <none> ii firmware-nvidia-graphics 20250410-2 pn firmware-qcom-soc <none> pn firmware-qlogic <none> ii firmware-realtek 20250410-2 pn firmware-samsung <none> pn firmware-siano <none> pn firmware-ti-connectivity <none> pn xen-hypervisor <none> -- no debconf information -- The patch for this issue -- >From 28bcd74f209e3de7a3908864758861b756f41bf2 Mon Sep 17 00:00:00 2001 From: root <root@debian2> Date: Fri, 31 Jul 2026 14:08:45 +0900 Subject: [PATCH] drm/nouveau/nv50: Fix DP SST regression on Fermi and restore NV50/Tesla DP bring-up A regression was introduced in commit a5a7379f6d9d ("nv50-: split DP disable+enable into two modesets"), causing Quadro 600 (GF108, Fermi) to fail X startup. Kernel 6.1.0-51 works correctly, so this is a regression. Reverting a5a7379f6d9d restores correct behaviour on Quadro 600, but breaks NV50/Tesla boards such as Quadro FX 1800 (G94). On NV50/Tesla, the DP SOR/MMIO block requires a core update during DP SST enable; without it, the first modeset faults the MMIO block and even text mode fails to appear. This patch reverts the DP-SST portion of a5a7379f6d9d, and adds a one-time core update when a DP output is first used. This preserves the correct behaviour on NV50/Tesla while restoring the original DP SST sequence required by Fermi and later generations. Tested on: - NV50/Tesla: Quadro FX 1800 (G94) - Fermi: Quadro 600 / 2000 / 4000 - Kepler: Quadro K420 / K600 - Maxwell: Quadro K620 All tested boards now perform DP SST modeset correctly, without MMIO FAULT or INVALID_STATE, and Quadro 600 regression is resolved. Fixes: a5a7379f6d9d ("drm/nouveau/kms/nv50-: split DP disable+enable into two modesets") Signed-off-by: Takashi Yano <[email protected]> --- drivers/gpu/drm/nouveau/dispnv50/atom.h | 1 + drivers/gpu/drm/nouveau/dispnv50/core.h | 1 + drivers/gpu/drm/nouveau/dispnv50/disp.c | 18 ++++++++++++++++-- 3 files changed, 18 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/nouveau/dispnv50/atom.h b/drivers/gpu/drm/nouveau/dispnv50/atom.h index b43c4f9bbcdf..1bcfb2f16053 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/atom.h +++ b/drivers/gpu/drm/nouveau/dispnv50/atom.h @@ -12,6 +12,7 @@ struct nv50_atom { struct list_head outp; bool lock_core; bool flush_disable; + bool need_update_core; }; #define nv50_head_atom(p) container_of((p), struct nv50_head_atom, state) diff --git a/drivers/gpu/drm/nouveau/dispnv50/core.h b/drivers/gpu/drm/nouveau/dispnv50/core.h index f75088186fba..0dd8a50d262e 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/core.h +++ b/drivers/gpu/drm/nouveau/dispnv50/core.h @@ -9,6 +9,7 @@ struct nv50_core { const struct nv50_core_func *func; struct nv50_dmac chan; bool assign_windows; + bool updated_for_dp; }; int nv50_core_new(struct nouveau_drm *, struct nv50_core **); diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c index eed579a6c858..c6fbbf4b146f 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c @@ -2244,6 +2244,17 @@ nv50_disp_atomic_commit_tail(struct drm_atomic_state *state) memset(interlock, 0x00, sizeof(interlock)); flushed = true; + } else if (atom->need_update_core) { + /* Workaround for MMIO FAULT on Quadro FX 1800 */ + /* A part of nv50_disp_atomic_commit_core() */ + struct nv50_disp *disp = nv50_disp(drm->dev); + struct nv50_core *core = disp->core; + core->func->ntfy_init(disp->sync, NV50_DISP_CORE_NTFY); + core->func->update(core, interlock, true); + if (core->func->ntfy_wait_done(disp->sync, NV50_DISP_CORE_NTFY, + disp->core->chan.base.device)) + NV_ERROR(drm, "core notifier timeout\n"); + core->updated_for_dp = true; } } @@ -2517,9 +2528,12 @@ nv50_disp_outp_atomic_check_clr(struct nv50_atom *atom, if (IS_ERR(outp)) return PTR_ERR(outp); - if (outp->encoder->encoder_type == DRM_MODE_ENCODER_DPMST || - nouveau_encoder(outp->encoder)->dcb->type == DCB_OUTPUT_DP) + if (outp->encoder->encoder_type == DRM_MODE_ENCODER_DPMST) atom->flush_disable = true; + struct nv50_disp *disp = nv50_disp(outp->encoder->dev); + if (nouveau_encoder(outp->encoder)->dcb->type == DCB_OUTPUT_DP && + !disp->core->updated_for_dp) + atom->need_update_core = true; outp->clr.ctrl = true; atom->lock_core = true; } -- 2.47.3 --===============2556951238765252477== Content-Type: application/mbox MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="0001-drm-nouveau-nv50-Fix-DP-SST-regression-on-Fermi-and-.patch" RnJvbSAyOGJjZDc0ZjIwOWUzZGU3YTM5MDg4NjQ3NTg4NjFiNzU2ZjQxYmYyIE1vbiBTZXAgMTcg 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