Display errors with Radeon driver

[Geoff Teale]

When running unity-system-compositor I see the following effect both in lightdm and in unity itself. My screen display as a series of vertical bars wish black bars of roughly equal width between them. It's possible to make out pretty much everything on the screen, and interact with it, but text is illegible.

If I plug in a second screen to the HDMI port on my laptop then Iightdm renders as a predominantly black screen with a little garbage in the middle.

My system is a Thinkpad Edge E525 with an AMD A8-3500m APU with an onboard Radeon HD6620G. I'm using the open source radeon driver - which is stable under Xorg+Compiz in Saucy.

[Kai Mast (kai-mast)]

I can confirm this. I also have a ThinkPad Edge, although not the same model.

I think this is related to the radeon graphics drivers.

[Alexander Kubashin (kubashin-a)]

Confirm.
GPU: Radeon HD 7660D (integrated in processor AMD A10-5800K).

[Alex Montplaisir (alexandre-montplaisir)]

Having the same problem here (fuzzed display with vertical black bars), with a HD6870 desktop card. That is using today's unity-system-compositor (0.0.1+13.10.20130926.1-0ubuntu1)

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1218815, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.