Public bug reported: my laptop: HP Compaq nx9420 grafic card: [AMD/ATI] RV530/M56-P [Mobility Radeon X1600] system: UBUNTU 16.04 LTS
1. I boot into textmode (multi-user.target) with the boot-option "radeon.modeset=0" so the radeon kernel-driver is disabled. 2. the login appears as usual and I can login. Text-screen is o.k. 3. as soon as I load the radeon kernel-moduel (modprobe -v radeon modeset=1) the screen (still in textmode) starts flickering and is unreadable. the radeon module is: /lib/modules/4.10.0-42-generic/kernel/drivers/gpu/drm/radeon/radeon.ko the same flickering happens when when I use boot-option "radeon.modeset=1" and when booting into graphical.target. I tried some recommended work-arounds, e.g. /usr/share/X11/xorg.conf.d/20-radeon.conf; set Option "AccelMethod" "glamor" but without success Any idea how to use the radeon-driver with a Mobility Radeon X1600 and UBUNTU 16.04? B.t.w.: when using KNOPPIX V7.2 I have no problem with the grafic-card some more tests with differnt systems: - Ubuntu 14.04.5 LTS; kernel: 3.13.0-147-generic -> screen is o.k.; - Ubuntu 14.04.5 LTS; but: kernel: 4.2.0-42-generic -> screen flickers (unusable!) - Ubuntu 14.04.5 LTS; but: kernel: 4.4.0 -> screen flickers - Ubuntu 16.04 LTS and Ubuntu 18.04 LTS -> screen flickers - SO: the problem seems to start with Ubuntu kernel-versions >= 4.2.0 .... and the included radeon.ko kernel-driver ** Affects: ubuntu Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1772234 Title: Ubuntu 16.04 Radeon X1600 screen flickering To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1772234/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs