Nouveau - Sep 2010 - [Bug 30370] New: Nouveau module crashes with "divide error"

https://bugs.freedesktop.org/show_bug.cgi?id=30370

           Summary: Nouveau module crashes with "divide error"
           Product: xorg
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: aa_z9 at hotmail.com
         QAContact: xorg-team at lists.x.org


Created an attachment (id=38947)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=38947)
dmesg output with drm.debug=14  nouveau.reg_debug=0x0200

The latest version of the nouveau module crashes on my PC with a divide error.

git://anongit.freedesktop.org/nouveau/linux-2.6
Commit: 9c4f93718e0ced5c2b028cb84159a063daa5d576
Date: Fri Sep 24 09:17:02 2010 +1000

https://bugs.freedesktop.org/show_bug.cgi?id=30370

Marcin Slusarz <marcin.slusarz at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #38947|application/octet-stream    |text/plain
          mime type|                            |

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

https://bugs.freedesktop.org/show_bug.cgi?id=30370

--- Comment #1 from Marcin Slusarz <marcin.slusarz at gmail.com>
2010-09-25 04:42:04 PDT ---
Created an attachment (id=38950)
 View: https://bugs.freedesktop.org/attachment.cgi?id=38950
 Review: https://bugs.freedesktop.org/review?bug=30370&attachment=38950

debug patch

Check this patch and please attach dmesg output with it.
The patch will prevent the crash and may help figure out how to fix it
properly.

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

https://bugs.freedesktop.org/show_bug.cgi?id=30370

--- Comment #2 from aa_z9 at hotmail.com 2010-09-25 21:40:29 PDT ---
Created an attachment (id=38957)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=38957)
dmesg output with options: drm.debug=14 nouveau.reg_debug=0x0200

Patch applied, new dmesg output attached.

Thanks for your help.

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

https://bugs.freedesktop.org/show_bug.cgi?id=30370

Marcin Slusarz <marcin.slusarz at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #38957|application/octet-stream    |text/plain
          mime type|                            |

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

https://bugs.freedesktop.org/show_bug.cgi?id=30370

--- Comment #3 from Marcin Slusarz <marcin.slusarz at gmail.com>
2010-09-26 05:12:47 PDT ---
Ok, so we can't calculate clock for PLL_UNK05, which purpose is... unknown.

I guess we could apply this patch as is?

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

https://bugs.freedesktop.org/show_bug.cgi?id=30370

--- Comment #4 from Emil Velikov <eeydev at nottingham.ac.uk> 2010-09-26
10:57:37 PDT ---
The problem is a combined issue of two things

1. The original nv50 and nv98 use a pll_limits table v2.1 which has a default
pll_limits entry (reg == 0)

Note: The same revision of the pll table is being used on a range of nv4x
cards, where the some pll's are not present in the table, thus the default
entry's setting are being used 

2. The different cards have different UNK plls, that somewhat need to be setup
(their exact purpose is currently unknown but the vbios has values for them,
that appear to be used)

The above patch is a quick and easy solution, although actual check if the pll
has to be setup on the specific card, should be implemented

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

https://bugs.freedesktop.org/show_bug.cgi?id=30370

--- Comment #5 from Emil Velikov <eeydev at nottingham.ac.uk> 2010-10-09
10:04:18 PDT ---
Another patch solving your issue has been pushed already in master, but it
introduced a regression. Can you please test the latest git and tell us if the
issue still occur. Although in order for us to understand better the PM
procedure on your card can you dump your vbios[1] (and possibly provide a
PM-dump[2]) and send it to us

[1] http://nouveau.freedesktop.org/wiki/DumpingVideoBios
[2] http://nouveau.freedesktop.org/wiki/PowerManagementDumps

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

https://bugs.freedesktop.org/show_bug.cgi?id=30370

--- Comment #6 from aa_z9 at hotmail.com 2010-10-12 03:59:25 PDT ---
Created an attachment (id=39377)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=39377)
Video card BIOS

The latest git (4ec13442f9f9dfedb15473fdfc99fa71967ed48e) does not exhibit the
issue. This is good news.

Dump of video card BIOS is attached.

I can try to get a PM dump if it will help you, but it will have to wait until
I reconfigure the NVIDIA binary driver.

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

https://bugs.freedesktop.org/show_bug.cgi?id=30370

Lucas Stach <dev at lynxeye.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |eeydev at nottingham.ac.uk

--- Comment #7 from Lucas Stach <dev at lynxeye.de> 2011-02-15 01:58:17
PST ---
@Emil: could you please comment on this? Do we still need something or should
we close this bug as the reported problem is apparently fixed?

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

https://bugs.freedesktop.org/show_bug.cgi?id=30370

--- Comment #8 from Emil Velikov <eeydev at nottingham.ac.uk> 2011-02-15
02:21:35 PST ---
Currently there is a patch that does "handle" this situation [1].
Unfortunately
I was
 silly enough to assume perfect PLL limits table, therefore on some cards it
introduces
 a recession. It is mainly related to understanding/mapping the correct
registers on 
the all of the cards (thus my request for a Power-management dump).
As the mappings can be quite extensive and currently not fully known I would
opt out
 of my solution and prefer the one given by Marcin Slusarz [2]

[1]
http://cgit.freedesktop.org/nouveau/linux-2.6/commit/?id=eadc69cc9054594ff7860d407f855536af13af99
[2] https://bugs.freedesktop.org/attachment.cgi?id=38950
________________________________________
From: bugzilla-daemon at freedesktop.org [bugzilla-daemon at freedesktop.org]
Sent: 15 February 2011 09:58
To: eeydev at nottingham.ac.uk
Subject: [Bug 30370] Nouveau module crashes with "divide error"

https://bugs.freedesktop.org/show_bug.cgi?id=30370

Lucas Stach <dev at lynxeye.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |eeydev at nottingham.ac.uk

--- Comment #7 from Lucas Stach <dev at lynxeye.de> 2011-02-15 01:58:17
PST ---
@Emil: could you please comment on this? Do we still need something or should
we close this bug as the reported problem is apparently fixed?

--
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.
This message and any attachment are intended solely for the addressee and may
contain confidential information. If you have received this message in error,
please send it back to me, and immediately delete it.   Please do not use, copy
or disclose the information contained in this message or in any attachment. 
Any views or opinions expressed by the author of this email do not necessarily
reflect the views of the University of Nottingham.

This message has been checked for viruses but the contents of an attachment
may still contain software viruses which could damage your computer system:
you are advised to perform your own checks. Email communications with the
University of Nottingham may be monitored as permitted by UK legislation.

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

https://bugs.freedesktop.org/show_bug.cgi?id=30370

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

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

--- Comment #9 from Emil Velikov <emil.l.velikov at gmail.com> ---
The "regression" mentioned is that the incorrect pll entry/setting
were mapped.
All of that has been resolved with the linux 3.7 kernel rework

Marking as Resolved/Fixed

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.freedesktop.org/archives/nouveau/attachments/20121101/138da362/attachment.html>