Nouveau - Dec 2008 - [Bug 19214] New: video mode change causes monitor to go out of range

http://bugs.freedesktop.org/show_bug.cgi?id=19214

           Summary: video mode change causes monitor to go out of range
           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: skliarie at gmail.com
         QAContact: xorg-team at lists.x.org


I have an LCD monitor with native resolution 1650x1050. When I try to change
the resolution to a different one (e.g. "xrandr -s 1024x768"), the
monitor goes
dark and following message appears:
Out of range
  Working range
  H: 30-96kHz
  V: 60-75Hz
  Max res 1680x1050
  Current mode
  H: 96kHz
  V: 60Hz

The nvidia driver was taken from package
xserver-xorg-video-nouveau version 1:0.0.10~git20081124-0~ppa1 downloaded from
http://ppa.launchpad.net/raof/ubuntu.

The NVidia card used is
01:00.0 VGA compatible controller: nVidia Corporation NV34 [GeForce FX 5200]
(rev a1)


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http://bugs.freedesktop.org/show_bug.cgi?id=19214





--- Comment #1 from Stuart Bennett <sb476 at cam.ac.uk>  2008-12-21
06:12:05 PST ---
Please include the output of the xrandr command, and attach /var/log/Xorg.0.log
when you have run X with the line `Option "ModeDebug" "on"
in the Device
section of /etc/X11/xorg.conf.

While the problem isn't immediately obvious (for one thing, the reported
mode
would seem to lie in the monitor's accepted range), it may be that xrandr is
attempting to set a DoubleScan mode; have you tried setting the refresh rate
with the xrandr command (something like "xrandr -s 1024x768 -r 60")?


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http://bugs.freedesktop.org/show_bug.cgi?id=19214





--- Comment #2 from Arie Skliarouk <skliarie at gmail.com>  2008-12-21
12:34:59 PST ---
> it may be that xrandr is attempting to set a DoubleScan mode;
> have you tried setting the refresh rate with the xrandr command
> (something like "xrandr -s 1024x768 -r 60")?
I tried to specify refresh rate and this time the video mode has changed
properly.

The mode setting algorithm still needs to be improved, as there are many games
that do their own mode switching and do not specify refresh rate assuming
(pretty logically) that the driver would take care about little details
(including choosing of highest possible viewable frequency).


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--- Comment #3 from Pekka Paalanen <pq at iki.fi>  2008-12-21 14:08:32 PST
---
This sounds very much like the doublescan mode brain damage. Double scan modes
are listed in xrandr just like normal modes except their refresh rate is
reported doubled.

Should this bug be marked as duplicate of Bug #16952 ?


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--- Comment #4 from Stuart Bennett <sb476 at cam.ac.uk>  2008-12-21
15:47:42 PST ---
(In reply to comment #3)
> This sounds very much like the doublescan mode brain damage. Double scan
modes
> are listed in xrandr just like normal modes except their refresh rate is
> reported doubled.
> 
> Should this bug be marked as duplicate of Bug #16952 ?
Probably, but I'd still like to see some xrandr output showing a 1024x768 at
120
mode, or an Xorg log first to confirm it.


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https://bugs.freedesktop.org/show_bug.cgi?id=19214

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

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

--- Comment #5 from Marcin Slusarz <marcin.slusarz at gmail.com>
2010-10-13 10:48:33 PDT ---
No reponse from the reporter for more than a year. Closing as duplicate of
mentioned bug. If the problem still exists on current version, please reopen
with requested logs.

*** This bug has been marked as a duplicate of bug 16952 ***

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