The detection of display resolution is wrong

[Sinkaiya]

Hi, I have Asus laptop model A6L (A6B00L) with 1280x800 LCD display. All previous Ubuntu ditributions (and others, like Open Suse, Gentoo, and Mandriva), including Ubuntu 7.04 Alpha Herd 5 have detected the resolution properly, but relaese did it wrong and set 1024x768. So I had to edit xorg.conf manually.

[Brian Murray (brian-murray)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. Could you please add your '/etc/X11/xorg.conf' file and your '/var/log/Xorg.0.log' file as attachments to your bug report? Thanks in advance.

[Sinkaiya (sinkaiya)]

Hi Brian! Here it is in the attachment. Please note that I've already changed my xorg.conf manually. Thanks a lot for help.

Best regards,

Serge "Sinkaiya" Novikov

[Sinkaiya (sinkaiya)]

And /var/log/Xorg.0.log, of cource. :)

[Sylvain59 (sylvain59)]

Same thing with feisty woth an Asus A6R-B039H.

The Live CD randomly starts in 1024x768 or 1280x800. If 1024x768, I can't set to 1280x800 without the display bugging with arctefacts.

With Ubuntu installed and 1280x800, sometines the opening session display starts with a wrong resolution, I don't know what resolution since the screen is very large. Ctrl+Alt+Suppr resume the right resolution.

My graphic card is a Ati x200 mobility with 128MB shared memory, no fglrx installed.

[Bryce Harrington (bryce)]

Sylvain59, the issue appears to be that Ubuntu failed to detect your monitor and is using (poor) generic monitor settings. This is a dupe of bug 49827.

The workaround is to look up the horiz sync and vert refresh rates for your monitor from your monitor's manual, and then edit the /etc/X11/xorg.conf file to specify them in place of "28-51" and "43-60".

Please join the discussion on bug 49827 with your observations, especially if you continue to have difficulty getting it to work properly.