13-STABLE: crashing on graphical clients (Firefox, Librewolf, GIMP et cetera)

Hallo everybody,

a week ago I compiled a new 13-STABLE (FreeBSD 13.2-STABLE #77 stable/13-n254681-44a6088278ea:
Sat Feb 25 07:44:36 CET 2023 amd64, custom kernel, same happens with the recent regular
GENERIC kernel). ZFS root installation.

Graphics driver:
drm-510-kmod-5.10.163_2        graphics/drm-510-kmod
libdrm-2.4.115,1               graphics/libdrm
xf86-video-intel-2.99.917.916_3,1 x11-drivers/xf86-video-intel


Hardware:
Lenovo T560, 16 GB RAM, :

[...]
CPU: Intel(R) Core(TM) i7-6600U CPU @ 2.60GHz (2800.00-MHz K8-class CPU)
  Origin="GenuineIntel"  Id=0x406e3  Family=0x6  Model=0x4e  Stepping=3
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Features2=0x7ffafbff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,SDBG,FMA,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX,F16C,RDRAND>
  AMD Features=0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM>
  AMD Features2=0x121<LAHF,ABM,Prefetch>
  Structured Extended
Features=0x29c6fbf<FSGSBASE,TSCADJ,SGX,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,NFPUSG,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PROCTRACE>
  Structured Extended
Features3=0xbc002e00<MCUOPT,MD_CLEAR,TSXFA,IBPB,STIBP,L1DFL,ARCH_CAP,SSBD>
  XSAVE Features=0xf<XSAVEOPT,XSAVEC,XINUSE,XSAVES>
  IA32_ARCH_CAPS=0xc04<RSBA>
  VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID
  TSC: P-state invariant, performance statistics
real memory  = 17179869184 (16384 MB)
avail memory = 16462184448 (15699 MB)
CPU microcode: no matching update found
Event timer "LAPIC" quality 600
ACPI APIC Table: <LENOVO TP-N1K  >
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
FreeBSD/SMP: 1 package(s) x 2 core(s) x 2 hardware threads
random: registering fast source Intel Secure Key RNG
random: fast provider: "Intel Secure Key RNG"
random: unblocking device.
ioapic0 <Version 2.0> irqs 0-119
Launching APs: 1 3 2
random: entropy device external interface
kbd1 at kbdmux0
efirtc0: <EFI Realtime Clock>
efirtc0: registered as a time-of-day clock, resolution 1.000000s
smbios0: <System Management BIOS> at iomem 0xd7064000-0xd706401e
smbios0: Version: 2.8, BCD Revision: 2.8
aesni0: <AES-CBC,AES-CCM,AES-GCM,AES-ICM,AES-XTS>
acpi0: <LENOVO TP-N1K>
[...]

GPU:
[...]
drmn0: <drmn> on vgapci0
vgapci0: child drmn0 requested pci_enable_io
vgapci0: child drmn0 requested pci_enable_io
[drm] Unable to create a private tmpfs mount, hugepage support will be disabled(-19).
[drm] Got stolen memory base 0xda800000, size 0x2000000
drmn0: could not load firmware image 'i915/skl_dmc_ver1_27.bin'
drmn0: [drm] Failed to load DMC firmware i915/skl_dmc_ver1_27.bin. Disabling runtime power
management.
drmn0: [drm] DMC firmware homepage:
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/i915lkpi_iic0:
<LinuxKPI I2C> on drmn0
iicbus0: <Philips I2C bus> on lkpi_iic0
iic0: <I2C generic I/O> on iicbus0
lkpi_iic1: <LinuxKPI I2C> on drmn0
iicbus1: <Philips I2C bus> on lkpi_iic1
iic1: <I2C generic I/O> on iicbus1
lkpi_iic2: <LinuxKPI I2C> on drmn0
iicbus2: <Philips I2C bus> on lkpi_iic2
iic2: <I2C generic I/O> on iicbus2
sysctl_warn_reuse: can't re-use a leaf (hw.dri.debug)!
lkpi_iic3: <LinuxKPI I2C> on drm1
iicbus3: <Philips I2C bus> on lkpi_iic3
iic3: <I2C generic I/O> on iicbus3
lkpi_iic4: <LinuxKPI I2C> on drm2
iicbus4: <Philips I2C bus> on lkpi_iic4
iic4: <I2C generic I/O> on iicbus4
lkpi_iic5: <LinuxKPI I2C> on drm4
iicbus5: <Philips I2C bus> on lkpi_iic5
iic5: <I2C generic I/O> on iicbus5
[drm] Initialized i915 1.6.0 20200917 for drmn0 on minor 0
VT: Replacing driver "efifb" with new "fb".
start FB_INFO:
type=11 height=1080 width=1920 depth=32
pbase=0xe0000000 vbase=0xfffff800e0000000
name=drmn0 flags=0x0 stride=7680 bpp=32
end FB_INFO

[...]


Phenomena: 
- WindowMaker (wmaker) crashes on startup
- while using blackbox or twm working, windowmanager starts, but: running any(!) larger X11
client
- singleuser mode or console mode without graphics is all right

There is NO coredump, nor does the kernel jump into kernel debugging although I tried to
configure that.


Regards and thanks in advance,

oh



-- 
O. Hartmann