[Nouveau] [bisected] nouveau: "Failed to idle channel x" after resume

[Maarten Maathuis]

On Mon, Aug 13, 2012 at 9:49 PM, Maxim Levitsky <maximlevitsky at gmail.com> wrote:
> On Mon, 2012-08-13 at 18:22 +0200, Sven Joachim wrote:
>> On 2012-08-08 08:18 +0200, Sven Joachim wrote:
>>
>> > On 2012-08-08 08:08 +0200, Ben Skeggs wrote:
>> >
>> >> On Wed, Aug 08, 2012 at 08:00:21AM +0200, Sven Joachim wrote:
>> >>> Not for me on my GeForce 8500 GT, and I still cannot suspend more than
>> >>> once, subsequent attempts fail:
>> >>>
>> >>> ,----
>> >>> | Aug 8 07:49:16 turtle kernel: [ 91.697068] nouveau W[
>> >>> | PGRAPH][0000:01:00.0][0x0200502d][ffff880037be1d40] parent failed
>> >>> | suspend, -16
>> >>> | Aug  8 07:49:16 turtle kernel: [   91.697078] nouveau  [     DRM][0000:01:00.0] resuming display...
>> >>> `----
>> >> Interesting.  Were there any messages prior to that?
>> >
>> > Nothing interesting:
>> >
>> > ,----
>> > | Aug  8 07:49:16 turtle kernel: [   89.655362] nouveau  [     DRM][0000:01:00.0] suspending fbcon...
>> > | Aug  8 07:49:16 turtle kernel: [   89.655367] nouveau  [     DRM][0000:01:00.0] suspending display...
>> > | Aug  8 07:49:16 turtle kernel: [   89.696888] nouveau  [     DRM][0000:01:00.0] unpinning framebuffer(s)...
>> > | Aug  8 07:49:16 turtle kernel: [   89.696909] nouveau  [     DRM][0000:01:00.0] evicting buffers...
>> > | Aug  8 07:49:16 turtle kernel: [   89.696913] nouveau  [     DRM][0000:01:00.0] suspending client object trees...
>> > `----
>> >
>> >> I guess the the fifo
>> >> code detected a timeout when trying to save the graphics context, I have
>> >> I have other patches in my tree (I'll push them soon, tied up with other
>> >> work atm) that might help here.
>> >
>> > Thanks, I'll try them when they are available.
>>
>> With current nouveau master ("drm/nouveau: fix find/replace bug in
>> license header") suspending works again, thanks!  However, it is a bit
>> slow, taking between two and five seconds:
>>
>> ,----
>> | Aug 13 18:17:56 turtle kernel: [  678.524814] PM: Syncing filesystems ... done.
>> | Aug 13 18:18:09 turtle kernel: [  678.639202] Freezing user space processes ... (elapsed 0.01 seconds) done.
>> | Aug 13 18:18:09 turtle kernel: [  678.649954] Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.
>> | Aug 13 18:18:09 turtle kernel: [  678.663298] Suspending console(s) (use no_console_suspend to debug)
>> | Aug 13 18:18:09 turtle kernel: [  678.680884] sd 0:0:0:0: [sda] Synchronizing SCSI cache
>> | Aug 13 18:18:09 turtle kernel: [  678.681000] sd 0:0:0:0: [sda] Stopping disk
>> | Aug 13 18:18:09 turtle kernel: [  678.695141] parport_pc 00:07: disabled
>> | Aug 13 18:18:09 turtle kernel: [  678.695204] serial 00:06: disabled
>> | Aug 13 18:18:09 turtle kernel: [  678.695209] serial 00:06: wake-up capability disabled by ACPI
>> | Aug 13 18:18:09 turtle kernel: [  678.695235] nouveau  [     DRM][0000:01:00.0] suspending fbcon...
>> | Aug 13 18:18:09 turtle kernel: [  678.695239] nouveau  [     DRM][0000:01:00.0] suspending display...
>> | Aug 13 18:18:09 turtle kernel: [  678.742111] nouveau  [     DRM][0000:01:00.0] unpinning framebuffer(s)...
>> | Aug 13 18:18:09 turtle kernel: [  678.742189] nouveau  [     DRM][0000:01:00.0] evicting buffers...
>> | Aug 13 18:18:09 turtle kernel: [  682.357319] nouveau  [     DRM][0000:01:00.0] suspending client object trees...
>> | Aug 13 18:18:09 turtle kernel: [  683.526646] PM: suspend of devices complete after 4863.181 msecs
>> `----
>>
>> With the 3.4.8 kernel, suspending takes little more than one second.
>>
>> Cheers,
>>        Sven
> I confirm exactly the same thing.
>
> Here suspend takes more that 10 seconds:
>
> [ 2165.363878] nouveau  [     DRM][0000:01:00.0] suspending fbcon...
> [ 2165.363885] nouveau  [     DRM][0000:01:00.0] suspending display...
> [ 2165.475791] sd 0:0:0:0: [sda] Stopping disk
> [ 2166.396877] nouveau  [     DRM][0000:01:00.0] unpinning
> framebuffer(s)...
> [ 2166.396926] nouveau  [     DRM][0000:01:00.0] evicting buffers...
> [ 2174.809084] nouveau  [     DRM][0000:01:00.0] suspending client
> object trees...
> [ 2177.950222] nouveau 0000:01:00.0: power state changed by ACPI to D3
>
>
> Best regards,
> Maxim Levitsky
>
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In my case suspend also takes longer than usual, in the order of 10 seconds.

@Ben: Have you been able to reproduce this?

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