I can confirm this issue exists in the DV5224nr which is an AMD based HP with an ATI video chipset. Brightness up / down do not produce keycodes. This is under both Edgy 6.10 and Feisty Herd 3.
** Summary changed: - HP Nvidia GeForce Go 7400 laptop increase LCD brightness cause X to crash in Edgy + HP Laptops crash when adjusting brightness -- HP Laptops crash when adjusting brightness https://launchpad.net/bugs/80512 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
