** Description changed: Acer SK20 computer (Intel 845G graphics), Acer AL1511 LCD panel. Karmic, kernels 2.6.31-17-generic and 2.6.31-19-generic tested. Both fail to set the panel to its native 1024x768 resolution automatically; 640x350 mode is chosen instead, which the panel really doesn't like (weird aspect ratio, letterboxing, inconsistent contrast and brightness). This is a clean install of Karmic, and the same issue occured with the live CD. It - doesn't happen with a Hardy live CD. + <strike>doesn't happen</strike> also happens with a Hardy live CD. - Two separate workarounds are required, one to set the console frame - buffer to 1024x768 and the other to make the GUI operate at that + Two separate workarounds are required for Karmic, one to set the console + frame buffer to 1024x768 and the other to make the GUI operate at that resolution by default (with no workaround, 1024x768 *is* available in Preferences->Display, it's just not the default). For the frame buffer: uninstall Grub 2, install Grub, and add the following boot options to the # kopt= and all kernel lines: nomodeset=1 vga=791 For the GUI: start in Recovery mode, drop to a root shell, and run X -configure mv xorg.conf.new /etc/X11/xorg.conf vi /etc/X11/xorg.conf and replace all the generated "Display" subsections with - SubSection "Display" - Modes "1024x768" - EndSubSection + SubSection "Display" + Modes "1024x768" + EndSubSection The attached zip file includes output from dmidecode, lspci -vnvn, /proc/version_signature and three versions of output from dmesg and xrandr --verbose. The -with-default-settings versions are from a boot with default settings (no extra kernel options, no xorg.conf). The -with-vga791 versions have the nomodeset=1 and vga=791 kernel options, but no xorg.conf. The -with-vga791-and-xorgconf versions have both the workarounds given above. Thanks to Bryce Harrington for the information at https://wiki.ubuntu.com/X/Troubleshooting/Resolution#Problem:%20%20Resolution%20with%20Intel%20graphics%20was%20correct%20in%20Intrepid%20or%20Jaunty%20%28with%20no%20xorg.conf%20configuration%29%20but%20is%20limited%20in%20Karmic Without it, I would still be tearing hair instead of looking at a working console frame buffer, and would not have known the right way to submit this bug report. Sorry if I've just submitted this report twice; got a Launchpad error on my first try.
-- Missing monitor quirk for Acer AL1511 results in reduced resolution https://bugs.launchpad.net/bugs/522488 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
