Using 12.04 (64bit) and Acer Aspire TG 3820. After waking up, I see a black screen, and then it turns off, then again the black screen, and then again turn-off.
I think the problem is my graphic card (I have two: - AMD Mobility Radeon HD 5400 and - Intel HD). In BIOS I have GRAFIC CARD "discrete" (it used to be "switchable", but then it didn't even boot)
If I update my graphic card, I can't use Unity 3d, so this is no option for me. My graphics (sudo lshw -c video) is:
*-display description: VGA compatible controller product: Manhattan [Mobility Radeon HD 5400 Series] vendor: Hynix Semiconductor (Hyundai Electronics) physical id: 0 bus info: pci@0000:02:00.0 version: 00 width: 64 bits clock: 33MHz capabilities: pm pciexpress msi vga_controller bus_master cap_list rom configuration: driver=radeon latency=0 resources: irq:46 memory:b0000000-bfffffff memory:afee0000-afefffff ioport:2000(size=256) memory:afe00000-afe1ffff *-display description: VGA compatible controller product: Core Processor Integrated Graphics Controller vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 12 width: 64 bits clock: 33MHz capabilities: msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:43 memory:f0000000-f03fffff memory:d0000000-dfffffff ioport:1800(size=8)