Nouveau - Oct 2014 - [Bug 85465] New: X loses resources after suspend/resume

https://bugs.freedesktop.org/show_bug.cgi?id=85465

            Bug ID: 85465
           Summary: X loses resources after suspend/resume
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: barkalow at iabervon.org
        QA Contact: xorg-team at lists.x.org

After suspending to ram and resuming, many things appear blank, and dmesg has
errors. In particular: icons for iconified windows, all non-core text (xterm
with misc-fixed still works, but web browsers have nothing), images in web
pages, the contents of windows (until they get redrawn). Restarting the X
server fixes it.

hardware: NVIDIA Corporation GF116M [GeForce GT 560M] (rev a1)

versions:
 xorg: 1.15.0
 nouveau: compiled for 1.15.0, module version = 1.0.10
 libdrm: 2.4.52
 mesa: 10.0.4
 kernel: 3.14.19

I can try newer versions of particular things if it would be helpful, although
I don't know which component would be relevant and I haven't seen any
similar
reports. I can also apply patches for more debugging info.

The errors are a lot of lines like:

[24060.452246] nouveau E[  PGRAPH][0000:01:00.0] TRAP ch 2 [0x005fba0000
X[2287]]
[24060.452254] nouveau E[  PGRAPH][0000:01:00.0] SHADER 0xa004021e

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https://bugs.freedesktop.org/show_bug.cgi?id=85465

--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Could you try booting with

nouveau.config=PCE1=0

And seeing if that helps? This sounds like some resource copies aren't
working
properly (either on suspend or on resume) and some GF116's have been known
to
be silently missing their second copy engine (or we're not doing something
to
properly enable or we're not looking in the right place for the disable or
...
who knows).

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Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|X loses resources after     |[NVCF] X loses resources
                   |suspend/resume              |after suspend/resume

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--- Comment #2 from Daniel Barkalow <barkalow at iabervon.org> ---
That seems to work, so I can just use that. Thanks! Let me know if you'd
like
me to test patches to handle this hardware automatically.

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--- Comment #3 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Well, first I'd like to get information... basically we need to figure out
how
to figure out that the second copy engine is busted. (Or, conversely, how to
un-bust it.)

Can you install envytools (https://github.com/envytools/envytools) and let's
start with some easy stuff... as root, get the output of:

nvapeek 22400 200

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--- Comment #4 from Daniel Barkalow <barkalow at iabervon.org> ---
I get:

00022400: 00000000 00000000 00000000 00000002
00022410: 00000000 00000000 30000000 00000000
00022420: 00000000 00000000 00000800 00000000
00022430: 00000001 00000004 00000003 00000000
...

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Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #5 from Ilia Mirkin <imirkin at alum.mit.edu> ---
After further investigation it appears that no GF116's actually contain a
second "regular" copy engine, so it's been disabled completely.
3.18 should fix
it and the patch is being backported to the stable trees.

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