radeon driver on lubuntu 14.04-15.10 displays white flickering scan lines and occasionally parts of the windows on external monitor
Submitted by Guilhermino
Assigned to xf86-video-ati maintainers
Description
Created attachment 118802
Small video describing the problem
This bug was reported on Ubuntu Launchpad at: https://bugs.launchpad.net/bugs/1442378
On a Compaq Presario 2500 laptop with an Ati IGP 345M graphics card,
when connected to an external monitor ( SAMSUNG P2470HD - FullHD
monitor/tv ) through a VGA analog connection, and using the latest
open radeon driver on Lubuntu 14.04.2 with all the latest updates,
when using the native resolution ( 1920x1080@60 ) of the monitor, and
even at lower ones, except the lowest, there are small white lines
flickering all over the display especially when there is movement in
the windows or menus, and sometimes even small fragments of the window
contents appear momentarily across different parts of the monitor.
This does not happen when using a Windows XP installation on the same
laptop with the same monitor and with the same D-Sub cable.
I've also noticed recently that there is some banding noise only discernible
on a solid background, as in a noisy cable transmission.
I've tried to install the fglrx driver, but there seems to be none
available for this card either on the AMD website nor on the
additional drivers repository of lubuntu. Installing the fglrx driver,
the card was never recognized. The command "sudo amdconfig --initial"
returns the error message: "amdconfig: No supported adapters
detected".
Attachment 118802, "Small video describing the problem":
20151009_151223_small