Screen resolution misdetection

[iahim]

Default Screen resolution is mis-detected in Xubuntu 8.04 - it was 1024x768 in Gutsy Gibbon and earlier but now it defaults to 800x600 in Hardy Heron (both Ubuntu and Xubuntu).
Hardware: Toshiba satellite Pro 6000, Celeron 1066 MHz, 384M RAM, HDD
 80G Samsung. Built in video adapter - Trident series.

[Ola (erik-o-engstrom)]

I have the same problem with a Compaq Deskpro using an ATI 3D Rage card when doing dual install w. WindowsXP.
Maximum resolution w. no tinkering in xorg.conf gives a maximum resolution of 800*600. Monitor is a Packard Bell A927 - It should be detected correctly or ??
The monitor section of xorg.conf looks like:
Section "Monitor"
       Identifier "Configured Monitor"
EndSection
The monitor is using horisontal and vertical scanning frequencies of 30-95 kHz /50-102 Hz.
Adding this information by hand makes the monitor behave as expected.
As I'm - on a small scale - promoting Ubuntu as a replacement for older versions of MS Windows on older hardware As Jo and Johan User can't be expected to tinker w. xorg.conf this undetection of older hardware worries me.

Running a live CD of 8.04 on a newer machine using a Samtron 94 monitor gives exactly the same problem - the screen is not correctly detected.

[Charlie Kravetz (cjkgeek)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please attach your X server configuration file (/etc/X11/xorg.conf) and X server log file (/var/log/Xorg.0.log) to the bug report as individual uncompressed file attachments using the "Attachment:" box below. Could you please also try to run without any /etc/X11/xorg.conf and let Xorg autodetect your display and video card? Please also attach the /var/log/Xorg.0.log from this attempt. Thanks in advance.

[Ola (erik-o-engstrom)]

I tried wo. xorg.conf no change. Xorg.conf in attatchment.
rgds
/ola

[Ola (erik-o-engstrom)]

Here comes the last 40 lines of the log.

[Charlie Kravetz (cjkgeek)]

Thank you for your help with this. I am confirming this bug so the developers can begin work. Thanks also for the attachments.

[Bryce Harrington (bryce)]

Attach your full Xorg.0.log, and the output of the following commands:

  * lspci -vvnn
  * sudo ddcprobe
  * xrandr --verbose
  * sudo get-edid | parse-edid # from the read-edid package

If your Xorg.0.log shows "DDC read failed", then perhaps you're seeing a variant of bug #288807

[Gareth Colling (garfie)]

I had a similar problem with a Toshiba Satellite Pro 6000, it was fixed
by cuting and pasting the display and screen parts from a xorg.conf file
from 6.06 install into 8.10 xorg.conf. The screen on the toshiba didn't
support ddc.

On Wed, 2009-01-07 at 03:13 +0000, Bryce Harrington wrote:

> Attach your full Xorg.0.log, and the output of the following commands:
>
> * lspci -vvnn
> * sudo ddcprobe
> * xrandr --verbose
> * sudo get-edid | parse-edid # from the read-edid package
>
> If your Xorg.0.log shows "DDC read failed", then perhaps you're seeing a
> variant of bug #288807
>
> ** Changed in: xorg (Ubuntu)
> Status: Confirmed => Incomplete
>