unable to detect LG 1520 LCD properly

[Paul Sharp]

I have used Ubuntu since 5.10, and really enjoyed 5.10. When 6.06 came out, I attempted to use it as well. I had no problems with video on my desktop computer, however, 6.06 & higher won't detect the proper monitor on my Gateway Solo 9500.
I have not found any places to change the monitor in Ubuntu - only option is to change the screen resolution and frequency. The monitor is a fairly common LG (LG 1520). If I install 5.10 on this laptop, it works flawlessly. If I fresh install 6.06 (and now 6.10) it doesn't work - it has a split screen and no way to correct it. Ubuntu needs a way to select the monitor like other flavors of Linux have, or allow the installer to select a monitor on installation. Safe graphics mode doesn't work either. If I use newer than 5.10, I have to install 5.10, and then upgrade it. It then seems to work.

Note: the original reporter indicated the bug was in package 'x-display-manager'; however, that package was not published in Ubuntu.

[Paul Sharp (paul5082)]

Just to add here, it's really difficult to determine exactly which part of "x" this is from, but the laptop display just isn't recognized. Again 5.10 correctly recognizes it, but 6.06 or higher with a clean install won't. Upgrading from 5.10 will retain the monitor settings.

I've also noticed Kubuntu 5.10 is the same, and 6.06 versions won't correctly install either, but, Kubuntu allows you to select a monitor. Would this be too difficult to add to Ubuntu?

[Andrew Ash (ash211)]

Can you please provide the output of `cat /etc/X11/xorg.conf` on the working installation and on a nonworking livecd from 6.06 or 6.10? Thanks for the bug report.

[Paul Sharp (paul5082)]

This is a copy of xorg.conf with 6.10 Live cd - Next is getting it to work after an installation:

[Paul Sharp (paul5082)]

Ubuntu 6.10 will not configure display, even after installation. It gives two screen resolutions in Preferences - 800x600 and 640x480 @ 60 or 56Hz. I slid in the hard drive that has Kubuntu 6.10 on it, copied the xorg.conf file to a thumb drive, booted back to Ubuntu 6.10, copied the xorg.conf file from Kubuntu 6.10 to Ubuntu 6.10, and it almost worked. After I changed the screen resolution to 1280x1024, it works flawlessly. Lower resolutions will not work, however 800x600, 1024x768 both work on this laptop with Ubuntu 5.10 the first time. Attached is a copy of the xorg.conf from Kubuntu 6.10. I haven't compared notes on the two as of yet.