Bug 601097 - KMS:RV515 Periodic Screen distortion
KMS:RV515 Periodic Screen distortion
Product: Fedora
Classification: Fedora
Component: xorg-x11-drv-ati (Show other bugs)
x86_64 Linux
low Severity high
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Assigned To: Jérôme Glisse
Fedora Extras Quality Assurance
: Triaged
Depends On:
  Show dependency treegraph
Reported: 2010-06-07 04:25 EDT by Michael Lausch
Modified: 2018-04-11 14:07 EDT (History)
2 users (show)

See Also:
Fixed In Version: kernel-
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2010-11-02 08:39:05 EDT
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Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Screenshot of distorted screen (173.30 KB, image/jpeg)
2010-06-07 04:25 EDT, Michael Lausch
no flags Details
The X server log file (38.53 KB, text/plain)
2010-06-07 04:28 EDT, Michael Lausch
no flags Details
dmesg output (58.32 KB, text/plain)
2010-06-07 04:28 EDT, Michael Lausch
no flags Details

  None (edit)
Description Michael Lausch 2010-06-07 04:25:07 EDT
Created attachment 421746 [details]
Screenshot of distorted screen

Description of problem:
From time to time the screen is unreadable. See attached screenshot. The problem can be resolved by either:

- sometimes by scroll wildly up and down in a (browser) window

- sometimes just be patient and the problem will resolve itself (maybe this
  depends on playing a video)

- reliable Cycle through Suspend/Resume

Version-Release number of selected component (if applicable):

How reproducible:
sometimes it goes a working day without problems, sometimes it distorts the screen once an hour

Steps to Reproduce:
Sorry, I didn't find any usage patterns that reliable trigger this bug
I'll attach 
- a screenshot (poor quality, taken with mobile phone)
- the Xorg.0.log file
- a dmesg output (although this does not show anything when the bug happens)

I suspect that the kernel is influencing the probability of the bug. I discovered the behaviour in F12 after a kernel update (major version change) but no ati driver update.
but maybe this was just a coincidence.
Comment 1 Michael Lausch 2010-06-07 04:28:03 EDT
Created attachment 421747 [details]
The X server log file
Comment 2 Michael Lausch 2010-06-07 04:28:49 EDT
Created attachment 421748 [details]
dmesg output
Comment 3 Michael Lausch 2010-06-12 12:51:56 EDT
There are for sure interactions with the kernel. I've been running the system for the last few days with kernel modeset disables and tried to reproduce this bug, bit t didn't show.

So the kernel modeset seems to be necessary to reproduce the bug.
Comment 4 Michael Lausch 2010-11-02 08:06:41 EDT
The bug does not appear anymore witht he current fedora 13 kernel.
So this ticket could be closed.
Comment 5 Matěj Cepl 2010-11-02 08:39:05 EDT
Thank you for letting us know.

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