[Bug 89698] [abrt] WARNING: CPU: 2 PID: 1491 at drivers/gpu/drm/i915/intel_pm.c:5997 intel_display_power_put+0x14c/0x160 [i915]()

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89698

--- Comment #10 from Imre Deak <imre.deak at intel.com> ---
(In reply to Philip Prindeville from comment #9)
> (In reply to Imre Deak from comment #8)
> > (In reply to Philip Prindeville from comment #7)
> > > Created attachment 115010 [details]
> > > messages log with drm.debug=14
> > 
> > Hm, this doesn't include the output I expected, the kernel should output lot
> > of  debug messages with the "[drm:func]" prefix with this kernel option. Are
> > you maybe retrieving the log with some tool like journalctl that filters
> > these messages out?
> 
> No, that's the contents of my /var/log/messages* files for the range that
> you requested.
> 
> Is it possible that the DRM module got built with the debugging code turned
> off?

No, unless you have some custom/distro specific patch that would disable it.
The driver in the upstream kernel is always built to emit the debug messages if
drm.debug is set. But your syslog daemon may be configured to write kernel
messages above a certain loglevel to a separate file like /var/log/kern.log or
/var/log/debug.log, please check /etc/rsyslogd (or similar). You can also check
if these messages are really emitted by just running dmesg (but the output of
this is probably truncated, so it won't do).

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