Nouveau - Jun 2015 - [Bug 91037] New: desktop freezes shortly after boot with NV11 [GeForce2 MX/MX 400]

https://bugs.freedesktop.org/show_bug.cgi?id=91037

            Bug ID: 91037
           Summary: desktop freezes shortly after boot with NV11 [GeForce2
                    MX/MX 400]
           Product: xorg
           Version: unspecified
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: anonymissimus at arcor.de
        QA Contact: xorg-team at lists.x.org

Created attachment 116615
  --> https://bugs.freedesktop.org/attachment.cgi?id=116615&action=edit
dmesg > kernel_log.txt from ctrl+alt+F1 console after UI hangs in debian as
described

Using same computer/OS/packages as in
https://bugs.freedesktop.org/show_bug.cgi?id=91025 I plugged in my other
problematic card:

01:00.0 VGA compatible controller [0300]: NVIDIA Corporation NV11 [GeForce2
MX/MX 400] [10de:0110] (rev b2) (prog-if 00 [VGA controller])
    Subsystem: PROLINK Microsystems Corp MVGA-NVG11AM(400) [1554:1081]
    Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 11
    Memory at ee000000 (32-bit, non-prefetchable) [size=16M]
    Memory at f0000000 (32-bit, prefetchable) [size=128M]
    Expansion ROM at efff0000 [disabled] [size=64K]
    Capabilities: [60] Power Management version 2
    Capabilities: [44] AGP version 2.0
    Kernel driver in use: nouveau

symptoms:
Clicking a little around (opening/closing some windows from lxde's menu or
launcher) makes the UI hang quickly, usually after 10 seconds or less. After a
while (maybe 20 or 30 secs) the system reacts to me having pressed or pressing
ctrl+alt+F1 and I create log from that console. In case that I haven't
pressed
that shortcut yet, the display is almost unusable, the menu is hardly displayed
when I try to open it, so there's nothing else left to do.
Problem also happened booting systemrescuecd-x86-4.5.3 (live CD) in very
similar way.

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--- Comment #1 from anonymissimus at arcor.de ---
Created attachment 116616
  --> https://bugs.freedesktop.org/attachment.cgi?id=116616&action=edit
video bios from this card, using dd if=/dev/mem of=vbios.rom bs=1k skip=768
count=64

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--- Comment #2 from anonymissimus at arcor.de ---
Created attachment 116617
  --> https://bugs.freedesktop.org/attachment.cgi?id=116617&action=edit
dmesg > kernel_log.txt from ctrl+alt+F2 console after UI hangs after startx
command with systemrescuecd-x86-4.5.3

takes a little more window opening/closing until freeze

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--- Comment #3 from anonymissimus at arcor.de ---
I tried to "momentarily fix" the problem by stopping/restarting X

/etc/init.d/lightdm stop
/etc/init.d/lightdm start

under debian; this only works for as long as the hang hasn't happened yet.
Trying it afterwards takes me to a black screen when starting X. However,
ctrl+alt+F1 did (I think) always work, with delay at least. Therefore, the hang
level according to http://nouveau.freedesktop.org/wiki/HangDiagnosis/ is 2.
Attaching the log from this session as well, supposedly the most useful one.

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--- Comment #4 from anonymissimus at arcor.de ---
Created attachment 116619
  --> https://bugs.freedesktop.org/attachment.cgi?id=116619&action=edit
dmesg > log.txt attempt to "fix" it under debian by stopping and
restarting X

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--- Comment #5 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Your GPU is hanging... what sort of desktop environment is this? I'd
recommend
staying away from anachronistic setups which use 2015 features on hardware from
2002... e.g. stay away from GL compositors :)

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--- Comment #6 from anonymissimus at arcor.de ---
Well, this is LXDE http://lxde.org/ a modern, but lightweight desktop that
should be designed for such hardware...
Are you suggesting I should try another lightweight desktop ? Xfce would be an
option.

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--- Comment #7 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to anonymissimus from comment #6)
> Well, this is LXDE http://lxde.org/ a modern, but lightweight desktop that
> should be designed for such hardware...
> Are you suggesting I should try another lightweight desktop ? Xfce would be
> an option.
Nope, that should largely be fine. I was mainly warning you away from things
like gnome and kde which have very heavy things turned on by default.

So..... it looks like we're doing *something* which hangs the GPU, but we do
it
without triggering any errors from the card, it just stops processing commands.
That's nice.

I've never tried nouveau with a NV11, but I have used it with a NV17, and it
was fine, when using WindowMaker. NV17 introduces some 3D functionality on top
of what NV11 has, but we tend to be pretty good about detecting that (and if we
were calling it, we'd have seen errors about unknown methods).

Unfortunately I'm not sure how to debug this hang. Ben, thoughts on
providing a
way to see what was in the last-submitted exec request [pushbuf, relocs, etc]
before the hang (i.e. the one whose fence never gets reached)? Seems like that
should be moderately easy, no?

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--- Comment #8 from anonymissimus at arcor.de ---
It's clear to me that this machine wouldn't run with kde or gnome.

As I need to keep this hardware/OS combination available in an unusable state
to be able to generate the data you need to fix this I'd like to do that
quickly so that I can plug out the card again in favor of a better working one,
assuming there won't be a quick fix or workaround.
If it helps, I have the impression the hang happens when maximizing some window
onto the whole desktop.
I have run applications under gdb on command line in the past, if that's
what I
might have to do.

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Martin Peres <martin.peres at free.fr> changed:

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

--- Comment #9 from Martin Peres <martin.peres at free.fr> ---
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