GPU hanging after upgrade to 14.1

Hello.

I've got a Starlite laptop which has always worked flawlessly (at least 
WRT graphics).

> pciconf -lvb
> vgapci0@pci0:0:2:0:     class=0x030000 rev=0x06 hdr=0x00 vendor=0x8086 device=0x3184 subvendor=0x0000 subdevice=0x0000
>     vendor     = 'Intel Corporation'
>     device     = 'GeminiLake [UHD Graphics 605]'
>     class      = display
>     subclass   = VGA
>     bar   [10] = type Memory, range 64, base 0x90000000, size 16777216, enabled
>     bar   [18] = type Prefetchable Memory, range 64, base 0x80000000, size 268435456, enabled
>     bar   [20] = type I/O Port, range 32, base 0x1000, size 64, enabled


However, a few days ago I upgraded it from 13.3 to 14.1 and it started 
giving troubles (usually 2-3 times a day, while performing normal 
desktop work).
When in happens, the screen might get garbled in different ways, it 
might be unresponsive or not, but in the end I have to press 
Ctrl-Alt-Backspace and start over.

What I see in the first console might be (please forgive any little 
mistake, as I need to rewrite it from a picture):

 > drmn0: [drm] GPU HANG: ecode 9:1:85dffdfb, in MainThread [100791]
 > drmn0: [drm] Resetting rcs0 for preemption time out
 > drmn0: [drm] Xorg[100791] context reset due to GPU hang

or:

 > drmn0: [drm] Resetting rcs0 for CS error
 > drmn0: [drm] MainThread[100791] context reset due to GPU hang
 > drmn0: [drm] GPU HANG: ecode 9:1:00280001, in MainThread [100791]
 > drmn0: [drm] GPU HANG: ecode 9:1:85dfffff, in MainThread [100791]
 > drmn0: [drm] Resetting rcs0 for preemption time out
 > drmn0: [drm] Xorg[100791] context reset due to GPU hang

I've seen a couple of bug reports, but those does not look the same to me.



I'm using 2023Q3 port tree, so:
 > # pkg info|grep -E "(drm|xorg)"
> drm-61-kmod-6.1.92             DRM drivers modules
> drm-kmod-20220907_3            Metaport of DRM modules for the linuxkpi-based KMS components
> gpu-firmware-kmod-20240401,1   Firmware modules for the drm-kmod drivers
> libdrm-2.4.122,1               Direct Rendering Manager library and headers
> xorg-fonts-truetype-7.7_1      X.Org TrueType fonts
> xorg-server-21.1.13,1          X.Org X server and related programs
> xorgproto-2024.1               X Window System unified protocol definitions



Is this something known?
Something obvious to look into?
Are the instructions for reporting this still relevant, here?
> https://wiki.freebsd.org/Intel_GPU

  bye & Thanks
	av.