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How to fix “The system is running in low-graphics mode” error?

My problem came after doing a normal packages update in 12.04 and then reboot to never been able to boot normally, it appear the "The system is running in low-graphics mode" window and then I tried to fix the problem reinstalling the gmd.

Now I'm reinstalling the whole system, from the USB boot it went everything as usual before that update. I just want to never have to reinstall Ubuntu in this way again. Any thoughts?

I'm using Ubuntu 12.04 LTS on an Acer Aspire One D255

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marked as duplicate by jokerdino, Amith KK, stephenmyall, con-f-use, hexafraction Oct 26 '12 at 11:58

This question was marked as an exact duplicate of an existing question.

Similar problem here! – Greg Jul 24 '12 at 9:19
This question should instead be filed as a bug report, and as such is off-topic, thanks! Instructions on filing a bug report are here. – Jorge Castro Aug 5 '12 at 19:11

On my Acer Aspire One 722, I observed the X-server freezing after a minor update to kernel:

3.2.0-27-generic-pae #43-Ubuntu SMP Fri Jul 6 15:06:05 UTC 2012 i686 athlon i386 GNU/Linux

This seems to be connected to the WLAN driver.

The X server restarts correctly after changing to the console (Ctrl+Alt+F1) and killing the hanging X server. However this is only a workaround, and not a fix. As another suggestion: switching off WLAN before booting might work as well.

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