[Nouveau] [Bug 77674] "failed to read DPCD" on wake up with external monitor

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=77674

--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to comment #0)
> Hi folks,
> I have:
> 
> 01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK107GLM
> [Quadro K1000M] [10de:0ffc] (rev a1)
> (one year old thinkpad laptop)
> 
> and I'm unable to wake up. Well, not be, but my "Linux 3.11-2-amd64 #1 SMP
> Debian 3.11.8-1 (2013-11-13) x86_64 GNU/Linux" (Mint, Debian Edition,
> "testing").
> Optimus is disabled in BIOS (only discrete is used). On waking up I see four
> lines:
> 
> [ 8618.926501] mei_me 0000:00:16.0: suspend
> [ 8623.309085] nouveau E[  PDISP][000:01:00.0] DP:0006:0f48: failed to read
> DPCD
> [ 8625.220708] dpm_run_callback(): usb_dev_resume+0x0/0x10 [usbcore] returns
> -32
> [ 8625.220712] PM: Device 4-1.8.1.1.1 failed to resume async: error -32
> 
> 
> Reproducible only with external monitors (via dock station).

Could you confirm that this still happens with the latest kernel (3.14.1)? If
it does, can you grab dmesg when you boot with

nouveau.debug=VBIOS=trace,PDISP=trace drm.debug=0xe

(including the suspend/resume bits).

> 
> 
> Sorry, not sure how to get Nouveau version.
> $ apt-cache showpkg xserver-xorg-video-nouveau
> ...
> Dependencies:
> 1:1.0.10-1 - libc6 (2 2.15)
> libdrm-nouveau2 (2 2.4.38)
> libdrm2 (2 2.4.25)
> libudev1 (2 183)
> xorg-video-abi-14 (0 (null))
> xserver-xorg-core (2 2:1.13.99.901)
> libgl1-mesa-dri (2 9.0)
> xserver-xorg-video-nouveau:i386 (0 (null))
> if that helps.

Not related to your issues, but there have been a lot of 3d driver improvements
since mesa 9.0... you might want to upgrade. 10.1 has been out for months now,
and 10.1.1 just got released. And if you want optimus to work, get xorg 1.14.3
or later... should give you much better battery life.

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