Re: [6.12.61 lts] [amdgpu]: regression: broken multi-monitor USB4 dock on Ryzen 7840U

Hi Harshit,

 > 1. Is this reproducible on MAINLINE 6.18 ?
I can't test that, as I am using ZFS-on-root and ZOL currently supports 
only up to 6.17.

 >  2. Can you bisect the cause between 6.12.59 and 6.12.60 ? (using git 
bisect) - Documentation: 
https://docs.kernel.org/admin-guide/bug-bisect.html
I have bisected it to (first bad commit):
commit ded77c1209169bd40996caf5c5dfe1a228a587ab  drm/amd/display: Fix 
pbn to kbps Conversion.
I've CC'd the author & signed-off folks to the thread.

thanks,
~ Peter

On 09/12/2025 10:46, Harshit Mogalapalli wrote:
> Hi Peter,
>
> On 09/12/25 15:00, Péter Bohner wrote:
>> Hi Harshit,
>>
>> sorry for the late reply (and replying privately at first),
>> I had to wait for the release.
>>
>
> Np!
>
>> Unexpectedly, this is NOT fixed, persisting in 6.12.61, same trace.
>>
>
> Sorry I guessed it based on the fixes that went into 6.12.61. Sorry 
> about the incorrect guess.
>
> I don't know if this is a known issue then. Couple of thing I would 
> try is:
>
> 1. Is this reproducible on MAINLINE 6.18 ?
> 2. Can you bisect the cause between 6.12.59 and 6.12.60 ? (using git 
> bisect) - Documentation: 
> https://docs.kernel.org/admin-guide/bug-bisect.html
>
> thanks,
> Harshit
>
>> regards,
>> ~Peter
>>
>> On 05/12/2025 19:10, Harshit Mogalapalli wrote:
>>> Hi,
>>>
>>> On 05/12/25 20:52, Péter Bohner wrote:
>>>> upgrading from 6.12.59 to 6.12.60 broke my USB4 (Dynabook 
>>>> Thunderbolt 4 Dock)'s video output with my Framework 13 (AMD Ryzen 
>>>> 7840U / Radeom 780M igpu) .
>>>> With two monitors plugged in, only one of them works, the other 
>>>> (always the one on the 'video 2' output) remains blank (but 
>>>> receives signal).
>>>>
>>>> relevant dmesg [note: tainted by ZFS]
>>>> (full output at: https://gist.github.com/x- 
>>>> zvf/128d45d028230438b8777c40759fa997):
>>>>
>>>
>>> Just a note:
>>>
>>> This looks related to whats fixed in 6.12.61:
>>>
>>> https://lore.kernel.org/ 
>>> stable/[email protected]/
>>>
>>> Try with 6.12.61 maybe ?
>>>
>>> Thanks,
>>> Harshit
>>>
>>>>
>>>> [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* 
>>>> wait_for_completion_timeout timeout!
>>>> ------------[ cut here ]------------
>>>> WARNING: CPU: 15 PID: 3064 at 
>>>> drivers/gpu/drm/amd/amdgpu/../display/ dc/ 
>>>> link/hwss/link_hwss_dpia.c:49 
>>>> update_dpia_stream_allocation_table+0xf2/0x100 [amdgpu]
>>>> Modules linked in: hid_logitech_hidpp hid_logitech_dj snd_seq_midi 
>>>> snd_seq_midi_event uvcvideo videobuf2_vmalloc uvc videobuf2_memops 
>>>> snd_usb_audio videobuf2_v4l2 videobuf2_common snd_usbmidi_lib 
>>>> snd_ump videodev snd_rawmidi mc cdc_ether usbnet mii uas 
>>>> usb_storage ccm snd_seq_dummy rfcomm snd_hrtimer snd_seq 
>>>> snd_seq_device tun ip6t_REJECT nf_reject_ipv6 ipt_REJECT 
>>>> nf_reject_ipv4 xt_multiport xt_cgroup xt_mark xt_owner xt_tcpudp 
>>>> ip6table_raw iptable_raw ip6table_mangle iptable_mangle 
>>>> ip6table_nat iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 
>>>> nf_defrag_ipv4 libcrc32c crc32c_generic ip6table_filter ip6_tables 
>>>> iptable_filter uhid cmac algif_hash algif_skcipher af_alg bnep vfat 
>>>> fat amd_atl intel_rapl_msr intel_rapl_common snd_sof_amd_acp70 
>>>> snd_sof_amd_acp63 snd_soc_acpi_amd_match snd_sof_amd_vangogh 
>>>> snd_sof_amd_rembrandt snd_sof_amd_renoir snd_sof_amd_acp 
>>>> snd_sof_pci snd_sof_xtensa_dsp snd_sof mt7921e snd_sof_utils 
>>>> mt7921_common snd_pci_ps mt792x_lib snd_hda_codec_realtek 
>>>> snd_amd_sdw_acpi soundwire_amd kvm_amd
>>>>   mt76_connac_lib snd_hda_codec_generic 
>>>> soundwire_generic_allocation snd_hda_scodec_component 
>>>> snd_hda_codec_hdmi mousedev mt76 soundwire_bus snd_hda_intel kvm 
>>>> snd_soc_core snd_intel_dspcfg irqbypass snd_intel_sdw_acpi mac80211 
>>>> snd_compress ac97_bus crct10dif_pclmul hid_sensor_als 
>>>> snd_pcm_dmaengine snd_hda_codec crc32_pclmul hid_sensor_trigger 
>>>> crc32c_intel snd_rpl_pci_acp6x industrialio_triggered_buffer 
>>>> snd_acp_pci polyval_clmulni kfifo_buf snd_hda_core 
>>>> snd_acp_legacy_common polyval_generic libarc4 hid_sensor_iio_common 
>>>> industrialio ghash_clmulni_intel leds_cros_ec cros_ec_sysfs 
>>>> cros_ec_hwmon cros_kbd_led_backlight cros_charge_control 
>>>> led_class_multicolor gpio_cros_ec cros_ec_chardev cros_ec_debugfs 
>>>> sha512_ssse3 snd_hwdep snd_pci_acp6x hid_multitouch joydev spd5118 
>>>> hid_sensor_hub cros_ec_dev sha256_ssse3 snd_pcm btusb cfg80211 
>>>> sha1_ssse3 btrtl aesni_intel snd_pci_acp5x btintel snd_timer 
>>>> snd_rn_pci_acp3x sp5100_tco gf128mul ucsi_acpi crypto_simd btbcm 
>>>> snd_acp_config snd amd_pmf typec_ucsi cryptd snd_soc_acpi
>>>>   i2c_piix4 btmtk bluetooth rapl wmi_bmof pcspkr typec k10temp 
>>>> thunderbolt amdtee soundcore ccp snd_pci_acp3x i2c_smbus rfkill 
>>>> roles cros_ec_lpcs i2c_hid_acpi amd_sfh cros_ec platform_profile 
>>>> i2c_hid tee amd_pmc mac_hid i2c_dev crypto_user dm_mod loop 
>>>> nfnetlink bpf_preload ip_tables x_tables hid_generic usbhid amdgpu 
>>>> zfs(POE) crc16 amdxcp spl(OE) i2c_algo_bit drm_ttm_helper ttm 
>>>> serio_raw drm_exec atkbd gpu_sched libps2 vivaldi_fmap 
>>>> drm_suballoc_helper nvme drm_buddy i8042 drm_display_helper 
>>>> nvme_core video serio cec nvme_auth wmi
>>>> CPU: 15 UID: 1000 PID: 3064 Comm: kwin_wayland Tainted: P  OE 
>>>> 6.12.60-1- lts #1 9b11292f14ae477e878a6bb6a5b5efc27ccf021d
>>>> Tainted: [P]=PROPRIETARY_MODULE, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE
>>>> Hardware name: Framework Laptop 13 (AMD Ryzen 
>>>> 7040Series)/FRANMDCP07, BIOS 03.16 07/25/2025
>>>> RIP: 0010:update_dpia_stream_allocation_table+0xf2/0x100 [amdgpu]
>>>> Code: d0 0f 1f 00 48 8b 44 24 08 65 48 2b 04 25 28 00 00 00 75 1a 
>>>> 48 83 c4 10 5b 5d 41 5c 41 5d e9 10 ec e3 d9 31 db e9 6f ff ff ff 
>>>> <0f> 0b eb 8a e8 05 09 c3 d9 0f 1f 44 00 00 90 90 90 90 90 90 90 90
>>>> RSP: 0018:ffffd26fe3473248 EFLAGS: 00010282
>>>> RAX: 00000000ffffffff RBX: 0000000000000025 RCX: 0000000000001140
>>>> RDX: 00000000ffffffff RSI: ffffd26fe34731f0 RDI: ffff8bb78c7bb608
>>>> RBP: ffff8bb7982c3b88 R08: 00000000ffffffff R09: 0000000000001100
>>>> R10: ffffd27000ef9900 R11: ffff8bb78c7bb400 R12: ffff8bb7982ed600
>>>> R13: ffff8bb7982c3800 R14: ffff8bb984e402a8 R15: ffff8bb7982c38c8
>>>> FS:  000073883c086b80(0000) GS:ffff8bc51e180000(0000) 
>>>> knlGS:0000000000000000
>>>> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>>> CR2: 00002020005ba004 CR3: 000000014396e000 CR4: 0000000000f50ef0
>>>> PKRU: 55555554
>>>> Call Trace:
>>>>   <TASK>
>>>>   ? link_set_dpms_on+0x7a5/0xc70 [amdgpu 
>>>> d75f7e51e39957084964278ab74da83065554c01]
>>>>   link_set_dpms_on+0x806/0xc70 [amdgpu 
>>>> d75f7e51e39957084964278ab74da83065554c01]
>>>>   dce110_apply_single_controller_ctx_to_hw+0x300/0x480 [amdgpu 
>>>> d75f7e51e39957084964278ab74da83065554c01]
>>>>   dce110_apply_ctx_to_hw+0x24c/0x2e0 [amdgpu 
>>>> d75f7e51e39957084964278ab74da83065554c01]
>>>>   ? dcn10_setup_stereo+0x160/0x170 [amdgpu 
>>>> d75f7e51e39957084964278ab74da83065554c01]
>>>>   dc_commit_state_no_check+0x63d/0xeb0 [amdgpu 
>>>> d75f7e51e39957084964278ab74da83065554c01]
>>>>   dc_commit_streams+0x296/0x490 [amdgpu 
>>>> d75f7e51e39957084964278ab74da83065554c01]
>>>>   ? srso_alias_return_thunk+0x5/0xfbef5
>>>>   ? schedule_timeout+0x133/0x170
>>>>   amdgpu_dm_atomic_commit_tail+0x6a1/0x3a10 [amdgpu 
>>>> d75f7e51e39957084964278ab74da83065554c01]
>>>>   ? srso_alias_return_thunk+0x5/0xfbef5
>>>>   ? psi_task_switch+0x113/0x2a0
>>>>   ? srso_alias_return_thunk+0x5/0xfbef5
>>>>   ? srso_alias_return_thunk+0x5/0xfbef5
>>>>   ? srso_alias_return_thunk+0x5/0xfbef5
>>>>   ? schedule+0x27/0xf0
>>>>   ? srso_alias_return_thunk+0x5/0xfbef5
>>>>   ? schedule_timeout+0x133/0x170
>>>>   ? srso_alias_return_thunk+0x5/0xfbef5
>>>>   ? dma_fence_default_wait+0x8b/0x230
>>>>   ? srso_alias_return_thunk+0x5/0xfbef5
>>>>   ? srso_alias_return_thunk+0x5/0xfbef5
>>>>   ? wait_for_completion_timeout+0x12e/0x180
>>>>   commit_tail+0xae/0x140
>>>>   drm_atomic_helper_commit+0x13c/0x180
>>>>   drm_atomic_commit+0xa6/0xe0
>>>>   ? __pfx___drm_printfn_info+0x10/0x10
>>>>   drm_mode_atomic_ioctl+0xa60/0xcd0
>>>>   ? sock_poll+0x51/0x110
>>>>   ? __pfx_drm_mode_atomic_ioctl+0x10/0x10
>>>>   drm_ioctl_kernel+0xad/0x100
>>>>   drm_ioctl+0x286/0x500
>>>>   ? __pfx_drm_mode_atomic_ioctl+0x10/0x10
>>>>   amdgpu_drm_ioctl+0x4a/0x80 [amdgpu 
>>>> d75f7e51e39957084964278ab74da83065554c01]
>>>>   __x64_sys_ioctl+0x91/0xd0
>>>>   do_syscall_64+0x7b/0x190
>>>>   ? srso_alias_return_thunk+0x5/0xfbef5
>>>>   ? __x64_sys_ppoll+0xf8/0x180
>>>>   ? srso_alias_return_thunk+0x5/0xfbef5
>>>>   ? syscall_exit_to_user_mode+0x37/0x1c0
>>>>   ? srso_alias_return_thunk+0x5/0xfbef5
>>>>   ? do_syscall_64+0x87/0x190
>>>>   ? srso_alias_return_thunk+0x5/0xfbef5
>>>>   ? do_syscall_64+0x87/0x190
>>>>   ? srso_alias_return_thunk+0x5/0xfbef5
>>>>   ? do_syscall_64+0x87/0x190
>>>>   ? srso_alias_return_thunk+0x5/0xfbef5
>>>>   ? do_syscall_64+0x87/0x190
>>>>   ? srso_alias_return_thunk+0x5/0xfbef5
>>>>   ? do_syscall_64+0x87/0x190
>>>>   ? srso_alias_return_thunk+0x5/0xfbef5
>>>>   ? irqentry_exit_to_user_mode+0x2c/0x1b0
>>>>   entry_SYSCALL_64_after_hwframe+0x76/0x7e
>>>> RIP: 0033:0x738842d9b70d
>>>> Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 
>>>> 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 
>>>> <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
>>>> RSP: 002b:00007ffe3c7ed230 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
>>>> RAX: ffffffffffffffda RBX: 0000634abd49c210 RCX: 0000738842d9b70d
>>>> RDX: 00007ffe3c7ed320 RSI: 00000000c03864bc RDI: 0000000000000013
>>>> RBP: 00007ffe3c7ed280 R08: 0000634abc4049bc R09: 0000634abce43e80
>>>> R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe3c7ed320
>>>> R13: 00000000c03864bc R14: 0000000000000013 R15: 0000634abc404840
>>>>   </TASK>
>>>> ---[ end trace 0000000000000000 ]---
>>>>
>>>>
>>>> regards,
>>>> ~ Peter
>>>>
>>>>
>>>>
>>>>
>>>
>
-- 
Mit freundlichen Grüßen

Péter Bohner