[Bug 55600] New: Connecting a GPU after X was started causes wine to break

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=55600

            Bug ID: 55600
           Summary: Connecting a GPU after X was started causes wine to
                    break
           Product: Wine
           Version: 8.15
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: activeds
          Assignee: wine-bugs(a)winehq.org
          Reporter: mark(a)unserver.de
      Distribution: ---

Hi

I have a notebook with Intel GPU and an external Nvidia connected via
Thunderbolt. Native software works always fine: vkcube, glmark2, glxgears,
vkmark all good, on booth GPUs and their 32 bit versions all run fine as well.
More complex stuff runs fine too.

And wine also runs fine, as long as i connect the Egpu before i start X. But if
i connect the eGPU after X was started, wine breaks. No matter what i run, even
winecfg or Explorer.exe. The system starts to stutter (mouse moves fine,
background processes seem to run fine too, but X hangs for a few seconds, then
works for a brief moment, hangs again, ...) and no window ever appears.

Wine reports:
0138:err:winediag:nodrv_CreateWindow Application tried to create a window, but
no driver could be loaded.

I can happily provide full logs, configs and the usual stuff, but as i do not
know whats necessary i refrain from dumping a wall of text until i'm asked to
do so.

One thing i noted is that xrandr reports two providers when the Gpu was
connected before X was started, and only when it was connected after. But keep
in mind that everything works in both cases except wine.
Another thing, as soon as the stutter begins i get kernel messages:
[ 1413.308613] i915 0000:00:02.0: [drm] *ERROR* LSPCON init failed on port D
[ 1414.701163] i915 0000:00:02.0: [drm] *ERROR* Failed to probe lspcon
in time with the stutter and on each stutter.

I can reproduce the problem even without an eGpu by just unbinding a Gpu and
rebinding it after X is started:
Unbind: echo "1" > /sys/bus/pci/devices/0000\:01\:00.0/remove
Rebind: echo '\\_SB.PCI0.PEG0.PEGP._ON' > /proc/acpi/call; echo 1 >
/sys/bus/pci/rescan

I can always force wine onto the Intel GPU
VK_ICD_FILENAMES="/usr/share/vulkan/icd.d/intel_icd.i686.json" wine
whatever.exe
and then it works. But only on the intel Gpu, which kind of defeats the purpose
of an eGpu :D

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