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Recently, I have installed Ubuntu on my Acer Aspire Notebook. Everything works flawlessly, except for the graphics card. For example when I try to watch movies they run at a much lower frame rate than in Windows. I suspect the system is running in VGA mode.

Therefore I checked the boot options with cat /proc/cmdline, and it seems nomodeset is activated. However, if I try to remove that, the Display turns off.

user203053
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1 Answers1

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Finally I have found the problem, and solved it. The problem was apparently that the monitor backlight was completely switched off. Until now I have used the Bootoption nomodeset to prevent it. However, I just had to add the following boot options instead:

acpi_backlight=vendor acpi_osi=Linux video.use_bios_initial_backlight=0
user203053
  • 524