Bug 92419

Summary: radeon driver on lubuntu 14.04-15.10 displays white flickering scan lines and occasionally parts of the windows on external monitor
Product: xorg Reporter: Guilhermino <guilherminocorreia>
Component: Driver/RadeonAssignee: xf86-video-ati maintainers <xorg-driver-ati>
Status: RESOLVED MOVED QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: unspecified   
Hardware: x86 (IA32)   
OS: Linux (All)   
URL: https://bugs.launchpad.net/bugs/1442378
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
Small video describing the problem
none
small video describing the problem.
none
attachment-19527-0.html
none
xorg.0.log file
none
dmesg output file
none
glxinfo output file none

Description Guilhermino 2015-10-10 21:40:48 UTC
Created attachment 118802 [details]
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".
Comment 1 Guilhermino 2015-10-10 21:44:02 UTC
Created attachment 118803 [details]
small video describing the problem.
Comment 2 Alex Deucher 2015-10-12 14:49:16 UTC
Does setting radeon.disp_priority=2 on the kernel command line in grub help?
Comment 3 Guilhermino 2015-10-12 15:47:35 UTC
Created attachment 118843 [details]
attachment-19527-0.html

No it doesn’t. Thanks.

 

De: bugzilla-daemon@freedesktop.org [mailto:bugzilla-daemon@freedesktop.org] 
Enviada: segunda-feira, 12 de Outubro de 2015 15:49
Para: guilherminocorreia@gmail.com
Assunto: [Bug 92419] radeon driver on lubuntu 14.04-15.10 displays white flickering scan lines and occasionally parts of the windows on external monitor

 

Comment # 2 <https://bugs.freedesktop.org/show_bug.cgi?id=92419#c2>  on bug 92419 <https://bugs.freedesktop.org/show_bug.cgi?id=92419>  from  <mailto:alexdeucher@gmail.com> Alex Deucher 

Does setting radeon.disp_priority=2 on the kernel command line in grub help?
  _____  


You are receiving this mail because: 

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Comment 4 Michel Dänzer 2015-10-13 03:42:09 UTC
Please attach the Xorg.0.log file and the output of dmesg and glxinfo corresponding to the problem.
Comment 5 Guilhermino 2015-10-13 13:40:47 UTC
Created attachment 118854 [details]
xorg.0.log file
Comment 6 Guilhermino 2015-10-13 13:41:16 UTC
Created attachment 118855 [details]
dmesg output file
Comment 7 Guilhermino 2015-10-13 13:41:53 UTC
Created attachment 118856 [details]
glxinfo output file
Comment 8 Guilhermino 2015-10-13 13:49:38 UTC
Here are the files. I should add, though, that I was incorrect when I said that setting radeon.disp_priority=2 did not change anything as it actually made the problem worse, instead of just a few scan lines there were entire blocks of the screen and the small scan lines garbled up in the background whenever there was any action on screen.
Comment 9 Martin Peres 2019-11-19 07:53:00 UTC
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

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