Happens for me on Utopic with an Acer Extensa 5230E (Intel 4500M) using Kubuntu Plasma 5.1.1. Usually everything works fine until I start a new lightdm/sddm (tried both, doesn't matter) session on VT8 and switching back to the old session (VT7). VT8 is also corrupted if I switch there.
I did not experience this bug until I switch from 14.04 x86 (KDE 4.14.1) to Kubuntu 14.10 x64 by complete reinstall. Also I upgraded RAM to 3GB and tested it well with MemoryTest (no errors), but could it be some sort of corruption in graphics memory, because this laptop allocates graphics memory when needed (At least it seems to do this). -- 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/659434 Title: Font/image corruption after resume from hibernate Status in linux package in Ubuntu: Incomplete Bug description: Binary package hint: xorg Since updating to Maverick I've noticed that the display becomes somewhat corrupted after resuming from hibernate on my laptop. It looks like the X server's cached images have become corrupt (guess!). It starts out small, but after a few cycles text becomes totally unreadable. * It's mostly text which is corrupt, and each instance of the same character looks similarly garbled * All applications are affected - eg terminal, Firefox, chromium, apport-gtk, the GNOME menus * Changing the font (eg by changing to "Monochrome" from "Best shapes" in the Appearance Settings->Font makes many things look better, but revert to being unreadable after switching back * Changing the font size in the application (terminal, Firefox) also temporarily fixes the issue * Some images in Firefox also become garbled, but recover after a forced reload. I can confirm that the issue still happens with the mainline kernel (linux-image-3.4.0-999-generic_3.4.0-999.201204170501_amd64.deb). ProblemType: Bug DistroRelease: Ubuntu 10.10 Package: xorg 1:7.5+6ubuntu3 ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4 Uname: Linux 2.6.35-22-generic x86_64 Architecture: amd64 DRM.card0.LVDS.1: status: connected enabled: enabled dpms: On modes: 1280x800 edid-base64: AP///////wBMozM2AAAAAAAPAQOAIRV4Cof1lFdPjCcnUFQAAAABAQEBAQEBAQEBAQEBAQEB7hoAgFAgEDAQMBMAS88QAAAZAAAADwAAAAAAAAAAACOHAmQCAAAA/gBTQU1TVU5HCiAgICAgAAAA/gBMVE4xNTRYMy1MMDYKAHA= DRM.card0.VGA.1: status: disconnected enabled: disabled dpms: Off modes: edid-base64: Date: Tue Oct 12 19:52:02 2010 MachineType: LENOVO 0769BMG ProcCmdLine: root=UUID=1fdf1f18-3ca9-447c-a9b5-9b40d4c276bd ro resume=/dev/sda4 resume2=/dev/sda4 quiet splash ProcEnviron: PATH=(custom, user) LANG=en_GB.utf8 SHELL=/bin/bash SourcePackage: xorg Symptom: display dmi.bios.date: 04/16/2008 dmi.bios.vendor: LENOVO dmi.bios.version: 68ET35WW dmi.board.name: IEL10 dmi.board.vendor: LENOVO dmi.board.version: REFERENCE dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: No Enclosure dmi.chassis.version: N/A dmi.modalias: dmi:bvnLENOVO:bvr68ET35WW:bd04/16/2008:svnLENOVO:pn0769BMG:pvr3000N200:rvnLENOVO:rnIEL10:rvrREFERENCE:cvnNoEnclosure:ct10:cvrN/A: dmi.product.name: 0769BMG dmi.product.version: 3000 N200 dmi.sys.vendor: LENOVO system: distro: Ubuntu codename: maverick architecture: x86_64 kernel: 2.6.35-22-generic [lspci] 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller [8086:2a02] (rev 0c) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:383e] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/659434/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
