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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)

PLEASE help

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CORRECTION: its the Radeon HD 5400 –  refle Apr 6 '13 at 22:10
    
Welcome to Ask Ubuntu! Please provide additional information only by editing your question and not within a comment. Comments might/will eventually be deleted and so your information would get lost. –  Basharat Sial Apr 6 '13 at 23:41
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