screen resolution detection regression in Jaunty

Thank you for reporting this issue and helping to make Ubuntu better.

There could be a number of different reasons why the resolution detection may have regressed, but to diagnose it we'll need a bit more information.

Would you mind running the following command? This will automatically attach a number of files we need for debugging X.org issues.

    apport-collect 348560

Thanks ahead of time!

Architecture: i386
DistroRelease: Ubuntu 9.04
Package: xorg 1:7.4~5ubuntu16
PackageArchitecture: i386
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_GB.UTF-8
ProcVersion: Linux version 2.6.28-11-generic (buildd@palmer) (gcc version 4.3.3 (Ubuntu 4.3.3-5ubuntu4) ) #37-Ubuntu SMP Mon Mar 23 16:40:23 UTC 2009
Uname: Linux 2.6.28-11-generic i686
UserGroups: adm admin audio cdrom dialout dip floppy lpadmin netdev plugdev powerdev scanner video

Aaargh, doing apport-collect with the external monitor actually turned on, which I suspect will be more helpful :)

Architecture: i386
DistroRelease: Ubuntu 9.04
Package: xorg 1:7.4~5ubuntu16
PackageArchitecture: i386
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_GB.UTF-8
ProcVersion: Linux version 2.6.28-11-generic (buildd@palmer) (gcc version 4.3.3 (Ubuntu 4.3.3-5ubuntu4) ) #37-Ubuntu SMP Mon Mar 23 16:40:23 UTC 2009
Uname: Linux 2.6.28-11-generic i686
UserGroups: adm admin audio cdrom dialout dip floppy lpadmin netdev plugdev powerdev scanner video

Hi Jane,

Looks like you just have a configuration error. Your xorg.conf is set up to allow a 1280X1792 maximum combined resolution. However, your laptop permits up to 1920x1440 and your external monitor supports up to 1920x1200.

I would recommend updating your xorg.conf to the following if you wish mirrored displays:

 SubSection "Display"
  Virtual 1920 1440
 EndSubSection

Or if you wish side-by-side displays, set it to:

 SubSection "Display"
  Virtual 3840 1440
 EndSubSection

Or if you wish above-and-below displays, set it to:

 SubSection "Display"
  Virtual 1920 2640
 EndSubSection

Theoretically, the GNOME X configuration tool ought to set this stuff up for you automatically, so if it isn't, that's probably a bug for Alberto Milone to look into.

I think this should solve your request, but if not let me know. I'll leave the bug open for now.

Yep, manually editing xorg.conf as suggested worked. Will leave it to you whether to close the bug or leave it open (one could argue that it should have been detected and set up automatically).

Thanks!

On Tue, Mar 31, 2009 at 10:51:21AM -0000, Jane Silber wrote:
> Yep, manually editing xorg.conf as suggested worked. Will leave it to
> you whether to close the bug or leave it open

I guess we can close it. The problem is a pretty well known issue.
We've several bug reports about both the core issue and the side-effect
usability issues caused by the workarounds.

> (one could argue that it should have been detected and set up
> automatically).

Agreed. Today we've pretty much eliminated 99% of the need for manual
xorg.conf editing, this virtual thing is one of the last 1% bits still
remaining. There is work in progress upstream that will finally solve
it, but it requires pretty significant architectural changes (including
kernel mode-setting), which will take time to be completed and
stabilized sufficiently for us.

Bryce

Architecture: amd64
DistroRelease: Ubuntu 9.04
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
Uname: Linux 2.6.28-11-generic x86_64
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

Architecture: i386
DistroRelease: Ubuntu 9.04
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.UTF-8
Uname: Linux 2.6.27-7-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare vboxusers www-data