Ubuntu 11.04 with HP Pavilion can't shutdown or reboot.
I am old linux user, been using linux for years, this is the first time in encounter this issue ever with many Linux distros on the same machine.
I tried many distro but mainly Ubuntu ( 10.04 , 10.10 , 10.04 ) , the system can't reboot or shutdown with. Other than that everything works fine. Same issue happened with Linux Mint ....
Well I have seen many questions with the same problem and no real answers yet, or accurate replies from Ubuntu or even HP.
My Machine is : HP Pavilion dv6 , Core i7 Processor , 4 GB Rams , ATI Radeon .... etc.