Yes, I expected this. So this is definitively a kernel bug, reassigning.
As a workaround, you can use the "nomodeset" boot option for now.
Thanks for debugging! The kernel team will most likely have more
questions/tests for you, though.
** Summary changed:
- Computer freeze when removing power cable
+ [HP Presario CQ61] changing brightness freezes computer
** Summary changed:
- [HP Presario CQ61] changing brightness freezes computer
+ [HP Presario CQ61] changing brightness freezes computer with KMS
** Package changed: gnome-power-manager (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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[HP Presario CQ61] changing brightness freezes computer with KMS
https://bugs.launchpad.net/bugs/615803
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