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I can confirm that Ubuntu 12.10 is NOT WORKING with HP Compaq 6820s anymore.

12.04.1 LTS works fine.

I tried boot from USB and DVD, just cursor blinking after loading initrd.

Something is broken, i suspect that KMS is causing the problem, it already causes some minor problems on previous versions on the Ubuntu ( USB mouse stuttering and freezing ).

EDIT: I just have tried boot Ubuntu 12.10 with "nomodeset" option enabled, and it worked ! You can try "radeon.modeset=0" also, it should do the same as "nomodeset" option. Sad thing is, that HW Accel 3D is completely disabled with that option, just 2D works.

So, if anyone can fix this. Thx !

Cheers !

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closed as off-topic by bain, Luis Alvarado Jul 24 '14 at 23:38

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Bug reports and problems specific to development version of Ubuntu should be reported on Launchpad so that developers can see, track and fix these issues." – bain, Luis Alvarado
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