I've been experiencing this bug too, on an integrated Radeon HD 2100:
01:05.0 VGA compatible controller: ATI Technologies Inc Radeon 2100
The fix from proposed seems to have solved it.
I've been experiencing this bug too, on an integrated Radeon HD 2100:
01:05.0 VGA compatible controller: ATI Technologies Inc Radeon 2100
The fix from proposed seems to have solved it.