** Project changed: launchpad => linux (Ubuntu) -- 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/1386867
Title: radeon fence failure reduces screen resolution Status in “linux” package in Ubuntu: New Bug description: While using Kubuntu 14.10 sometimes the screen blacks out for a few seconds and then comes back to life, but often with highly reduced resolution. The resolution of the screen actually seems to be fine (as evident by taking a screenshot) but things seem to get rendered on a much too small buffer and then streched to fit the screen (terrible upscaling?). Sorry I'm having a hard time explaining it, but see the attached screenshot. This actually happened multiple times. One time it logged me out of KDE, another time KDE stayed active but the resolution was reduced (or whatever this is) Attached is the output of dmesg, the relevant error seems to start here: [12105.193052] radeon 0000:01:00.0: ring 0 stalled for more than 10140msec [12105.193058] radeon 0000:01:00.0: GPU lockup (waiting for 0x00000000000dec08 last fence id 0x00000000000dec03 on ring 0) [12105.674184] radeon 0000:01:00.0: Saved 592 dwords of commands on ring 0. [12105.674320] radeon 0000:01:00.0: GPU softreset: 0x0000006C To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1386867/+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