https://bugzilla.kernel.org/show_bug.cgi?id=101261
Bug ID: 101261 Summary: Radeon - Kernel warning when driver is unbound to secondary GPU Product: Drivers Version: 2.5 Kernel Version: 4.0.7 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: bellamy.beau@gmail.com Regression: No
Created attachment 182281 --> https://bugzilla.kernel.org/attachment.cgi?id=182281&action=edit dmesg output
https://bugzilla.kernel.org/show_bug.cgi?id=101261
--- Comment #1 from Beau V.C. Bellamy bellamy.beau@gmail.com --- Created attachment 182291 --> https://bugzilla.kernel.org/attachment.cgi?id=182291&action=edit Script to unbind and start VM
https://bugzilla.kernel.org/show_bug.cgi?id=101261
--- Comment #2 from Beau V.C. Bellamy bellamy.beau@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.
https://bugzilla.kernel.org/show_bug.cgi?id=101261
Beau V.C. Bellamy bellamy.beau@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Summary|Radeon - Kernel warning |Radeon - Kernel warning |when driver is unbound to |when driver is unbound from |secondary GPU |secondary GPU
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