[Bug 80901] [radeon] loading corrupts lspci entry + unloading crashes kernel

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=80901

--- Comment #8 from Alex Deucher <alexdeucher at gmail.com> ---
(In reply to Andrea Paternò from comment #7)
> Makes sense! Nonetheless, the "unknown header type 7f" problem remains, as
> well as the unloading problem. I managed to capture the journal log of the
> system just before the crash, which is attached.

The lspci -vvv problem is that lspci doesn't power up the GPU so it just reads
back garbage since the GPU is powered down.  It should work if you run lspci
when the GPU is powered up (e.g., when rendering with DRM_PRIME=1 or if you
disable runtime power management (boot with radeon.runpm=0 on the kernel
command line in grub).  The crash is a bug in vgaswitcheroo I think rather than
the radeon driver.

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