Bug 21383 - X1200 screen flicker problem
Summary: X1200 screen flicker problem
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/radeonhd (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium critical
Assignee: Luc Verhaegen
QA Contact: Xorg Project Team
Depends on:
Reported: 2009-04-24 06:00 UTC by priikone
Modified: 2011-11-07 15:29 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

X logs (36.55 KB, text/x-log)
2009-04-24 06:01 UTC, priikone
no flags Details
xorg.conf (1.15 KB, application/octet-stream)
2009-04-24 06:01 UTC, priikone
no flags Details
Option "UseAtomBIOS" "true" (41.37 KB, text/x-log)
2009-04-24 07:55 UTC, priikone
no flags Details
Option "AtomBIOS" "pll=on" (36.91 KB, text/x-log)
2009-04-24 07:55 UTC, priikone
no flags Details

Description priikone 2009-04-24 06:00:43 UTC
Since fglrx that supports ubuntu 9.04 doesn't anymore support X1200 I had to start using radeonhd but it has some serious flickering problems.  Whenever there is enough movement in the screen the screen flickers, white lines, random garbage, and various displacements going on quite often.  Best example is a website which triggers the most sever problems with flash animations:


Depending on what flash animations is running there the screen is either flickering a little bit a quite a lot.  This site reproduces the problem every time.  (The site shows local weather in Helsinki area)

It can also be reproduced by for example giving dmesg;dmesg in gnome-terminal and then constantly doing Page Up and Page Down (with xset r rate 200 to get away the keyboard delay) and the screen will flicker.  With this I can also reproduce the problem every time.

Attached xorg.conf and X logs.

Whatever else data you need to get let me know.
Comment 1 priikone 2009-04-24 06:01:21 UTC
Created attachment 25099 [details]
X logs
Comment 2 priikone 2009-04-24 06:01:44 UTC
Created attachment 25100 [details]
Comment 3 Matthias Hopf 2009-04-24 07:01:46 UTC
Could you please test

  Option "UseAtomBIOS" "true"

in the device section? If that one works, please test

  Option "AtomBIOS" "pll=on"

instead, and *please* tell us the outcome.
Comment 4 priikone 2009-04-24 07:54:30 UTC
No difference with either option.  Attached X logs for both cases.
Comment 5 priikone 2009-04-24 07:55:11 UTC
Created attachment 25105 [details]
Option  "UseAtomBIOS" "true"
Comment 6 priikone 2009-04-24 07:55:34 UTC
Created attachment 25106 [details]
Option  "AtomBIOS" "pll=on"
Comment 7 Matthias Hopf 2009-04-24 08:25:49 UTC
As Luc indicated on IRC, this is more likely a watermark issue. We will hopefully get docs about that in the near future (fingers crossed)...
Comment 8 priikone 2009-04-24 08:33:07 UTC
I just installed the driver from Git but with same problems.  However, if you want to get out some debugs or anything else just let me know.
Comment 9 Maciej Cencora 2009-04-24 08:45:20 UTC
Could you check if the problems exists under heavy CPU load?

Some users report that when the CPU freq is scaled below e.g. 1GHz, they're seeing screen flickering.
Comment 10 priikone 2009-04-24 08:57:12 UTC
Hmm... Some improvement after setting the highest CPU frequency:

# cpufreq-selector -f 190000

It still happens with both the website and the gnome-terminal but less, quite a lot less actually.  Too bad though that the CPU fan just became audible :)
Comment 11 Jeremy Huddleston Sequoia 2011-10-16 15:57:17 UTC
Does this issue occur with the preferred ati driver (xf86-vide-ati)?  If so, please move this to the Driver/Radeon component.  

Development of radeonhd has pretty much halted and development focus is on the ati driver.  Please see http://www.x.org/wiki/radeonhd

If the issue does not exist in the ati driver (or if there is no response to this message), this bug will be closed as WONTFIX unless someone contributes a patch.
Comment 12 Jeremy Huddleston Sequoia 2011-11-07 15:29:28 UTC
Closing due to lack of response.  Please reopen and move to the Driver/Radeon 
component if this issue persists with xf86-video-ati

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