Nouveau - Nov 2013 - [Bug 71900] New: [NV40] GPU lockup and segmentation fault of Nouveau-1.0.10 on PowerMac G5 with acceleration

https://bugs.freedesktop.org/show_bug.cgi?id=71900

          Priority: medium
            Bug ID: 71900
          Assignee: nouveau at lists.freedesktop.org
           Summary: [NV40] GPU lockup and segmentation fault of
                    Nouveau-1.0.10 on PowerMac G5 with acceleration
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: dehua.yang at gmail.com
          Hardware: PowerPC
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

Created attachment 89611
  --> https://bugs.freedesktop.org/attachment.cgi?id=89611&action=edit
Dmesg

I tried to use nouvear driver with acceleration on gentoo PPC64 running on
Apple PowerMac G5, and failed with GPU lockup and segmentation fault. The linux
kernel booted successfuly into a console, then the screen was filled with
rubbish(colorful blocks or the like) and stuck there when I started
"startx" in
the console. After 5mins I pressed "Ctrl+Alt+F2" to switch to another
TTY and
succeeded, I got a message "nouveau E[  DRM] GPU lockup - switch to
software
fbcon". When I came again to the console X was launched, the X terminated
and
system fell back to the TTY with many errors(see dmesg and Xorg.0.log
attached). This only happens when nouveau has acceleration, when I disable it
by putting "Option 'NoAccel' 'true'" in xorg.conf, X
and Gnome run normally
without problems.

My computer is Apple PowerMac G5 of late 2003(PowerMac7,2) with GeForce
6800Ultra DDL graphics card(No any problem on Mac OXS 10.4.11). The followings
are installed:
The linux kernel 3.12.0, 
xorg-server 1.14.4, 
mesa 9.1.6, 
xf86-video-nouveau 1.0.10

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--- Comment #1 from dehua.yang at gmail.com ---
Created attachment 89612
  --> https://bugs.freedesktop.org/attachment.cgi?id=89612&action=edit
Xorg.0.log

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--- Comment #2 from dehua.yang at gmail.com ---
I tried also Fedora 20 Beta PPC64 and Lubuntu 13.10 Powerpc Desktop, they all
have the same problem.

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--- Comment #3 from Ilia Mirkin <imirkin at alum.mit.edu> ---
I'm not sufficiently familiar with PPC dmesg -- are you using 4K pages? If
not,
can you try it with 4K pages (CONFIG_PPC_4K_PAGES).

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--- Comment #4 from dehua.yang at gmail.com ---
Yes. In my kernel .config file, there is "CONFIG_PPC_4K_PAGES=y". I am
glad to
provide further info as required.

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--- Comment #5 from dehua.yang at gmail.com ---
I updated my system, now with:
kernel 3.12.1
mesa 9.2.3
nouveau 1.9.10
xorg-server 1.14.4
After I put option '"ShadowBF" "true"' in xorg.conf,
the nouveau driver works
with acceleration.  In glxinfo it has "direct rendering: Yes", and no
nouveau
error in dmesg and Xorg.0.log.

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--- Comment #6 from dehua.yang at gmail.com ---
Sorry for the error above. nouveau 1.0.10, not 1.9.10.

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--- Comment #7 from dehua.yang at gmail.com ---
Actually this is not HW acceleration by using ShadowFB. In Xorg.0.log there is
"Using Shadow Framebuffer - acceleration disabled", so I still have a
broken
nouveau driver with acceleration. When using ShadowFB it seems the graphics
operations are faster than that NoAccel option is enabled on my system. The 3D
seems not supported, there is no difference in FPS running glxgears in both
situations.

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Emil Velikov <emil.l.velikov at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugs.freedesktop.or
                   |                            |g/show_bug.cgi?id=58984

--- Comment #8 from Emil Velikov <emil.l.velikov at gmail.com> ---
There was a patch[1] on the ML, which should handle some of the mayhem on PPC. 
Ben had a couple of comments[2] so you might want to try the original patch
and/or address the points raised.

PPC is not the only arch affected by the "funny" page sizes, SPARC
seems to be
in the list as well see bug 58984.

[1] http://lists.freedesktop.org/archives/nouveau/2013-November/015226.html
[2] http://lists.freedesktop.org/archives/nouveau/2013-December/015358.html

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--- Comment #9 from Brock Wittrock <brockwittrock at gmail.com> ---
Is there any update on this bug/issue with pagesize issues on 64-bit PowerPC
and the nouveau driver?  I assume now as this is still marked as open, but
thought I would ask anyways. I've been able to partly get the driver working
by
using a kernel with 4kb page sizes and MSI interrupts disabled on Debian
Jessie.

I'll try to download, install, and build the latest nouveau driver to see if
there are any changes.  

Also, I do see this is marked as a to-do on under DRM on the nouveau website. 
I can provide any sort of output/logs necessary. Just wanted to try and revive
this somehow.

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--- Comment #10 from Brock Wittrock <brockwittrock at gmail.com>
---
>From what I was reading, Ben's patches weren't necessarily ideal for
final
inclusion into the driver.  Still trying to wrap my head around the comments
from that thread in the mailing list archives to see what changes need to be
made to get 64k page sizes working for G5 owners with Nvidia cards. 

Anybody able to provide any assistance with this somehow?

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--- Comment #11 from Ben Skeggs <skeggsb at gmail.com> ---
(In reply to Brock Wittrock from comment #10)
> From what I was reading, Ben's patches weren't necessarily ideal
for final
> inclusion into the driver.  Still trying to wrap my head around the
comments
> from that thread in the mailing list archives to see what changes need to
be
> made to get 64k page sizes working for G5 owners with Nvidia cards. 
> 
> Anybody able to provide any assistance with this somehow?
I plan on attempting to untangle the vm mess in the next few weeks, and this
will be one of the things I'll attempt to address while doing so.

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--- Comment #12 from Alex Perez <aperez at alexperez.com> ---
Ping, this bug is zombified. It's been open for nearly five years now, and
hasn't had a comment in over two years. 

Ben, two years ago, you wrote "I plan on attempting to untangle the vm mess
in
the next few weeks, and this will be one of the things I'll attempt to
address
while doing so."

Did anything ever come of that?

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--- Comment #13 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Alex, which issue are you talking about? Like almost every issue where someone
says "me too", they actually have a totally different issue.
Here's a list of
problems:

- MSI is broken
- 64k pages are broken
- Undiagnosed issue with the NV40 AGP

AFAIK all these issues are wholly unrelated to each other.

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

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

--- Comment #14 from Martin Peres <martin.peres at free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance:
https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/issues/75.

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