[Bug 105190] gem_quiescent_gpu assertion fails on distribution kernels

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105190

arkadiusz.hiler at intel.com <arkadiusz.hiler at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |NOTABUG
             Status|NEW                         |RESOLVED

--- Comment #8 from arkadiusz.hiler at intel.com <arkadiusz.hiler at intel.com> ---
Looks like it's caused by Fedora's customization. They picked up kernel
lockdown series https://lwn.net/Articles/723653/

If the system is booted using secure boot it puts the kernel in lockdown mode,
which includes disabling all the DebugFSes.

To enable it you have to lift the lockdown:

# sysctl kernel.sysrq=1
<Alt-PrtSc-x> on a physical keyboard; writing to /proc/sysrq-trigger does not
work
[  137.276888] sysrq: SysRq : Disabling Secure Boot restrictions
[  137.276963] Lifting lockdown

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