https://bugs.freedesktop.org/show_bug.cgi?id=105190
[email protected] <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |NOTABUG
Status|NEW |RESOLVED
--- Comment #8 from [email protected] <[email protected]> ---
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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