[Bug 111228] PRIME output screen satys black on 1002:15d8 with 128MB VRAM

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111228

--- Comment #4 from Maik Freudenberg <hhfeuer at gmx.de> ---
Both amdgpu and modesetting driver were tested, same effect.
Most notewothy in the non-prime modesetting driver case is this:
[     5.477] (EE) modeset(0): [DRI2] No driver mapping found for PCI device
0x1002 / 0x15d8
[     5.477] (EE) modeset(0): Failed to initialize the DRI2 extension.
[     5.477] (--) RandR disabled
[     5.480] (II) SELinux: Disabled on system
[     5.480] (II) AIGLX: Screen 0 is not DRI2 capable
[     5.480] (EE) AIGLX: reverting to software rendering

On those other systems mentioned with 2GB VRAM, the modesetting driver runs
fine in any case. This seems to be a different bug with the modesetting driver,
though. Non-prime+amdgpu driver runs fine.
Since the display starts to work after a suspend/resume cycle, seems to be a
kernel bug?

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