Public bug reported:
I was very excited to try out the new beta but couldn't get it to boot
without the nomodeset option. This problem also comes up If I upgrade
the kernel to 3.4 or 3.5 in 12.4. I think it might be a problem with
some trinity chips. I have tried using the discrete gpu (7490) disabled
enabled I have no idea why lenovo chose to put a weaker discrete chip
than the integrated one.
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: black screen trinity
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https://bugs.launchpad.net/bugs/1050350
Title:
a-10 4600m boots to black screen unless nomodeset option in grub with
kernel newer than 3.2
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