[Bug 101261] Radeon - Kernel warning when driver is unbound to secondary GPU

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Thu Jul 9 01:19:03 PDT 2015


https://bugzilla.kernel.org/show_bug.cgi?id=101261

--- Comment #2 from Beau V.C. Bellamy <bellamy.beau at gmail.com> ---
When unbinding the radeon driver from a second GPU in order to bind to the
vfio-pci driver (so it can be used on a virtual machine), the linux kernel will
display several warnings.  It looks like some resources may be double-freed. 
The GPU will otherwise work flawlessly in the VM with full acceleration on the
stock AMD windows drivers.

This actually shows up on all kernels that I've tried: 4.1.0, 3.19, 3.18, etc.

I'm not sure it's related, but the first GPU when running X on the host will
have some difficulties getting OpenGL working (I have a routine that involves a
dance with glxgears and firefox) and will work for some time and then take the
entire system down hard.  If I avoid anything OpenGL/DRM, the system will run
indefinitely.

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