[Nouveau] [Bug 18638] nouveau fails on GeForce 9400M

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=18638





--- Comment #11 from Pekka Paalanen <pq at iki.fi>  2009-10-20 09:12:04 PST ---
(In reply to comment #10)
> 
> echo mmiotrace > /sys/kernel/debug/tracing/current_tracer
> bash: echo: write error: Invalid argument

This should mean that mmiotrace support has not been compiled into the kernel.
Check that CONFIG_MMIOTRACE is enabled: Kernel hacking -> Tracers [*] -> Memory
mapped IO tracing.


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