I have the same problem on HP DV7-1260ew, sometimes when i boot Jaunty or Karmic the keyboard and mouse freezes at gdm login.
In Jaunty the power button rebooted computer but in Karmic power button is opening shutdown menu where i cant do anythink just force restart...
I can give all logs whih will be needed to solve this problem.
I have the same problem on HP DV7-1260ew, sometimes when i boot Jaunty or Karmic the keyboard and mouse freezes at gdm login.
In Jaunty the power button rebooted computer but in Karmic power button is opening shutdown menu where i cant do anythink just force restart...
I can give all logs whih will be needed to solve this problem.