@Chris Van Hoof, looks like Dell omitted this 1024x576 resolution in the EDID they're providing with this hardware model. Is that something one of your kernel guys could easily quirk in? Then it'd work without all this cvt madness.
@John, Regarding why the --addmode is resulting in a black screen, I don't know. Best guess is something changed in the kernel modesetting support. If this is true then booting the maverick kernel should make cvt work as before. If it doesn't, then there may indeed have been some other change in X or -intel. I would suggest turning on KMS debugging (install xdiagnose and run 'sudo xdiagnose' to bring up the GUI, then turn on modesetting debugging - it's the first checkbox in the dialog). Reboot, repeat the bug resulting in the black screen, then ssh into the broken machine and collect 'dmesg' output and post here. Theoretically that should tell us what the kernel is trying to do. Also, presuming you find that with the maverick kernel you don't get the black screen, the next step would be to test out some of the intermediate kernels between .35 and .38 to narrow down when the fix went in. Builds of these kernels are available at http://kernel.ubuntu.com/~kernel-ppa/mainline/. I'd start by testing each of the -rc1 kernels and the newest point release in each series (e.g. .36-rc1, .36.4, .37-rc1, .37.6, etc.) You're looking for a pattern where the -rc1 does not work but the .N does; once you have that, then find the kernel within that series where the fix first appears. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/787587 Title: Cannot change screen resolution on Dell Duo in Natty _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp