The Acer Extensa 5630Z is also affected by this bug. The i915.powersave=0 workaround solves the problem.
VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) Subsystem: Acer Incorporated [ALI] Device [1025:013c]
The Acer Extensa 5630Z is also affected by this bug. The i915.powersave=0 workaround solves the problem.
VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
Subsystem: Acer Incorporated [ALI] Device [1025:013c]