859501 - Artefacts when hardware acceleration is active

Status: RESOLVED DUPLICATE of bug 837489

(Firefox :: Untriaged, defect)

Description

[bigd]

Attachment: artefacts.jpg

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:20.0) Gecko/20100101 Firefox/20.0
Build ID: 20130326150557

Steps to reproduce:

Normal Firefox usage, for example on youtube, nothing special. Firefox Version was 19.0.2 first, but also after updating to 20 same problem.


Actual results:

Firefox started a few days ago giving artefacts in navigation-bar and that beige information-bar below (see image) when hardware acceleration is active. Sometimes also images on websites show artefacts, but that appeared just once. 

When hardware acceleration is turned off, only sometimes the box in the lower left corner showing the URL of a currently with the cursor howerd link turns black instead of disappearing. So it helps a lot, but not completly.

No specific website produces that error. Even currently my navigation-bar looks like a mosaic.

I got the idea of turning off the hardware acceleration from a post in a german forum (cant find it currently) and all of them had the same error, so its not just me. We all have ATI Radeon grafics.


Expected results:

Nothing! I expect Firefox to work without artefacts ;-)