Ian Bruntlett: >"BTW, the PC in question was originally running (32 bit) Windows XP. As we are experiencing problem with graphics when running 64 bit software, perhaps I should install Lubuntu 15.10 i386 and see if that works?"
While you are welcome to do that as a test (as the release and architecture are supported downstream via the L/Ubuntu Community), it wouldn't be recommended to use a i386 architecture going forward as it is deprecated upstream. Despite this, Could you please test the latest upstream kernel available from the very top line at the top of the page from http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D (the release names are irrelevant for testing, and please do not test the daily folder)? Install instructions are available at https://wiki.ubuntu.com/Kernel/MainlineBuilds . This will allow additional upstream developers to examine the issue. If the latest kernel did not allow you to test to the issue (ex. you couldn't boot into the OS) please make a comment in your report about this, and continue to test the next most recent kernel version until you can test to the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this issue is fixed in the mainline kernel, please add the following tags by clicking on the yellow circle with a black pencil icon, next to the word Tags, located at the bottom of the report description: kernel-fixed-upstream kernel-fixed-upstream-X.Y-rcZ Where X, Y, and Z are numbers corresponding to the kernel version. If the mainline kernel does not fix the issue, please add the following tags: kernel-bug-exists-upstream kernel-bug-exists-upstream-X.Y-rcZ Please note, an error to install the kernel does not fit the criteria of kernel-bug-exists-upstream. Once testing of the latest upstream kernel is complete, please mark this report's Status as Confirmed. Please let us know your results. Thank you for your understanding. ** Package changed: xorg (Ubuntu) => linux (Ubuntu) ** Changed in: linux (Ubuntu) Importance: Low => Medium -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1514102 Title: Intermittent graphics corruption Status in linux package in Ubuntu: Incomplete Bug description: Every so often the screen would be corrupted with horizontal lines of junk. WORKAROUND: Add to /etc/default/grub GRUB_CMDLINE_LINUX nomodeset: sudo update-grub reboot Now the system will only allow VGA 640x480 graphics. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: xorg 1:7.7+7ubuntu4 ProcVersionSignature: Ubuntu 4.2.0-17.21-generic 4.2.3 Uname: Linux 4.2.0-17-generic x86_64 ApportVersion: 2.19.1-0ubuntu4 Architecture: amd64 CurrentDesktop: LXDE Date: Sat Nov 7 18:44:01 2015 InstallationDate: Installed on 2015-11-07 (0 days ago) InstallationMedia: Lubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1514102/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
