Nouveau - Feb 2008 - [Bug 14491] New: enabling randr-1. 2 support causes LVDS unknown config bits error when starting the X server

http://bugs.freedesktop.org/show_bug.cgi?id=14491

           Summary: enabling randr-1.2 support causes LVDS unknown config
                    bits error when starting the X server
           Product: xorg
           Version: git
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: travisimo1993 at gmail.com
         QAContact: xorg-team at lists.x.org
            Blocks: 14405


Created an attachment (id=14298)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14298)
Xorg.0.log

I am running Nouveau on a Dell Latitude C840 with an NVIDIA GeForce 4 440 Go
which has 64MB of VRAM and AGP 4x. I am the unlucky owner of a C840 with a
Samsung LCD that needs a hacked EDID to work properly with the nvidia driver
(attached). My Linux kernel version is 2.6.24.1 and I am running Debian Testing
(Lenny).

Nouveau was compiled on 02/13/08 (today), and I removed the nvidia driver
before installing it.

I get this after enabling randr-1.2 support in the output of startx when it
starts the X server:

Raw DCB entry 0: 03000223 00000004
(EE) NOUVEAU(0): Unknown LVDS configuration bits, please report

The X server fails to start because there are no valid video modes to pick
from, so all the screens have a invalid configuration. Attached is a detailed
Xorg log file that details the register dumps.

lspci | grep -i vga:

01:00.0 VGA compatible controller: nVidia Corporation NV17 [GeForce4 440 Go]
(rev a3)


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--- Comment #1 from Travis M. <travisimo1993 at gmail.com>  2008-02-13
17:07:47 PST ---
Created an attachment (id=14299)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14299)
the hacked EDID file to make my LCD work properly under the propriatory nvidia
driver (it works fine with nv and nouveau out-of-the-box)


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--- Comment #2 from Henrik S?rensen <henrik.sorensen at gmail.com> 
2008-02-14 07:40:51 PST ---
I have the same issue on my very similiar Dell Insprion 8100 (The pentium 3-m
version of the C840 with inspiron stamped on it). The machine also has a NV17
card (gf 4 go 440) with an unknown SXGA+ LCD (1400x1050), it does not require
an edid hack or modeline for the nvidia blob, just an override to tell it to
use the LCD instead of the vga output it defaults to.

It fails with the same message when randr12 is enabled (works with it
disabled):

Raw DCB entry 0: 03000223 00000004
(EE) NOUVEAU(0): Unknown LVDS configuration bits, please report


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--- Comment #3 from Henrik S?rensen <henrik.sorensen at gmail.com> 
2008-02-14 07:42:03 PST ---
Created an attachment (id=14311)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14311)
X log with randr 1.2 enabled


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--- Comment #4 from Stuart Bennett <sb476 at cam.ac.uk>  2008-02-18
11:48:48 PST ---
Created an attachment (id=14394)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14394)
Patch to work around DCB v2.0 LVDS config bits issue

See what happens with this patch applied


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--- Comment #5 from Henrik S?rensen <henrik.sorensen at gmail.com> 
2008-02-19 08:18:29 PST ---
Created an attachment (id=14415)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14415)
X.org with patch applied


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--- Comment #6 from Danny <obiwan at mailmij.org>  2008-03-05 01:22:30 PST
---
Do you have any ModeLine, PreferredMode, HorizSync or VertRefresh lines in your
Monitor section? 
I am guessing Option "ModeDebug" "yes" may help to find why
it fails.

d.


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--- Comment #7 from Stuart Bennett <sb476 at cam.ac.uk>  2008-03-08
07:45:23 PST ---
Hi, can you confirm that the unknown LVDS config bits issue is now fixed?


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Stuart Bennett <sb476 at cam.ac.uk> changed:

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




--- Comment #8 from Stuart Bennett <sb476 at cam.ac.uk>  2008-04-26
17:09:14 PST ---
The LVDS config bits issue in question is fixed. Open a new bug if your laptop
still doesn't work.


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