Public bug reported: my laptop: HP Compaq nx9420 my grafic card: 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV530/M56-P [Mobility Radeon X1600] (prog-if 00 [VGA controller])
attachment: the bug-apport-file Description: I start ubuntu 18.04 LTS (Kernel 4.15.0.33) in textmode; -> as soon as the kernel-module radeon.ko is loaded the screen starts flickering when starting the grafic-mode the flickering continues; so the screen is unusable. when setting the option "radeon.modeset=0" (thus: not use radeon drivers) the screen does not flicker but the resolution is limited to 1400x1050 (instead of natural 1680x1050) so I can not use this as work-around when using the old ubuntu 14.04.05 LTS (Kernel 3.13.0-157) the screen is o.k. NO flickering in textmode, nice grafic, NO flickering xrandr tells: 1680x1050 60.1 so I must stay on old ubuntu 14.04.05 ??? ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: 18.04 flicker radeon ubuntu ** Attachment added: "apport.linux-image-4.15.0-33-generic.s5j_wb2y.apport" https://bugs.launchpad.net/bugs/1791312/+attachment/5186052/+files/apport.linux-image-4.15.0-33-generic.s5j_wb2y.apport -- 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/1791312 Title: ubuntu 18.04 flickering screen with Radeon X1600 Status in linux package in Ubuntu: New Bug description: my laptop: HP Compaq nx9420 my grafic card: 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV530/M56-P [Mobility Radeon X1600] (prog-if 00 [VGA controller]) attachment: the bug-apport-file Description: I start ubuntu 18.04 LTS (Kernel 4.15.0.33) in textmode; -> as soon as the kernel-module radeon.ko is loaded the screen starts flickering when starting the grafic-mode the flickering continues; so the screen is unusable. when setting the option "radeon.modeset=0" (thus: not use radeon drivers) the screen does not flicker but the resolution is limited to 1400x1050 (instead of natural 1680x1050) so I can not use this as work-around when using the old ubuntu 14.04.05 LTS (Kernel 3.13.0-157) the screen is o.k. NO flickering in textmode, nice grafic, NO flickering xrandr tells: 1680x1050 60.1 so I must stay on old ubuntu 14.04.05 ??? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/+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