It seems to be related to the /etc/rc.local script after all. I forgot to disable the execution bits the last time; but now I've run chmod -x, the problem really seems to be gone. I've done a fresh install and rebooted over 20 times, but I haven't seen anything weird anymore.
So I think it's safe to say that running something from /etc/rc.local breaks the X session; something that didn't happen in earlier versions. ** Summary changed: - After X update, tty7 is very glitchy + After the latest X update, /etc/rc.local breaks the X session ** Description changed: - Since last night's updates, automatically logging in with LightDM causes - the screen to be blank with only a cursor shown. The desktop does appear - to be rendered on the background, because moving icons and clicking - menus (after guessing where they are) does work. The only way to get - things normal again is by restarting the lightdm service. + Since last night's updates, after booting, the screen is blank with only + a cursor shown. The desktop does appear to be rendered on the + background, because moving icons and clicking menus (after guessing + where they are) does work. The only way to get things normal again is by + restarting the lightdm service, which essentially restarts the X server. It doesn't seem to happen every time, but it does happen a lot. I have - also noticed that when manually logging in, the dmesg output on tty7 - sometimes blends in with the desktop; for instance, a black box with a - blinking cursor is shown, or when plugging in a USB thumb drive, the - output from 'mount' will be displayed, until I move my cursor over that - area. + also noticed that the dmesg output on tty7 sometimes blends in with the + desktop; for instance, a black box with a blinking cursor is shown, or + when plugging in a USB thumb drive, the output from 'mount' will be + displayed, until I move my cursor over that area. I'm running fully up-to-date Xubuntu 12.10 (no proposed packages though) on a laptop with Intel graphics (xserver-xorg-video-intel driver). + + The problem appears to be caused by /etc/rc.local, which contains a line + to set my initial brightness. Removing everything from /etc/rc.local and + disabling the execution bit, seems to fix everything. + + In previous versions, as well as in earlier Ubuntu and Debian installs, + having this script did not cause any trouble. ProblemType: Bug ApportVersion: 2.6.1-0ubuntu2 Architecture: amd64 Date: Wed Oct 10 09:49:02 2012 DistroRelease: Ubuntu 12.10 Package: xserver-xorg 1:7.7+1ubuntu4 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 3.5.0-17.27-generic 3.5.5 SourcePackage: xorg Tags: quantal Uname: Linux 3.5.0-17-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) ** Tags removed: autologin blank lightdm screen -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1064878 Title: After the latest X update, /etc/rc.local breaks the X session To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1064878/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
