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
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https://bugs.launchpad.net/bugs/1791312
Title:
ubuntu 18.04 flickering screen with Radeon X1600
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