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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [drm:amdgpu_get_bios [amdgpu]] *ERROR* ACPI VFCT table present but broken (too short #2)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103463#c10">Comment # 10</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [drm:amdgpu_get_bios [amdgpu]] *ERROR* ACPI VFCT table present but broken (too short #2)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103463">bug 103463</a>
from <span class="vcard"><a class="email" href="mailto:devurandom@gmx.net" title="Dennis Schridde <devurandom@gmx.net>"> <span class="fn">Dennis Schridde</span></a>
</span></b>
<pre>(In reply to Michel Dänzer from <a href="show_bug.cgi?id=103463#c9">comment #9</a>)
<span class="quote">> (In reply to Dennis Schridde from <a href="show_bug.cgi?id=103463#c0">comment #0</a>)
> > During a boot like this, the second card (AMD Radeon RX 560) fails to come up
> > and is not available to the system.
>
> That's actually because of:
>
> [drm:gfx_v8_0_ring_test_ring [amdgpu]] *ERROR* amdgpu: ring 0 test failed
> (scratch(0xC040)=0xCAFEDEAD)
> [drm:amdgpu_device_init [amdgpu]] *ERROR* hw_init of IP block <gfx_v8_0>
> failed -22
> amdgpu 0000:01:00.0: amdgpu_init failed
>
> the other messages are probably mostly harmless / not directly related to
> this problem.
>
>
> > * Hangs of the entire system when I start Steam using `env DRI_PRIME=1
> > steam` (nothing reacts to commands anymore, including mouse clicks, the power
> > button and the num-lock key, and the mouse cursor moves very sluggishly)
>
> That's probably related to the above.</span >
Clarification / more information: The missing RX 560 happens for a few boots
*after* the full system hang. I.e. first I run Steam with DRI_PRIME=1, click
around for a bit until the system hangs (sometimes waiting alone seems to be
enough, though), then I hard-reset the system, when Linux started the RX 560 is
missing, I reboot, RX 560 is still missing, ... (loop for a few iterations)
..., RX 560 is back and we have a "regular boot".
<span class="quote">> > * The firmware and GRUB (and Linux, initially) display at 1024x768, while
> > the monitor's native resolution is 2560x1080.
>
> That's a motherboard firmware / video card ROM issue, nothing to do with the
> Linux kernel / drivers.</span >
One more bit of information (though probably still unrelated): The resolution
is correct when I do not plug in the RX 560, or connect the display to the RX
560 directly (and setup the mainboard firmware to use the dGPU as primary video
adapter).</pre>
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