Comment # 1 on bug 75917 from Yuanjie

I have the same problem with radeon/intel laptop:

00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated
Graphics Controller (rev 18)
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Madison [Mobility Radeon HD 5650/5750 / 6530M/6550M] (rev ff)