I've tested with 3.2.0rc4. It still freezes, but not the same way. It freezes "more slowly" (reproduced 3 times). At first, I can move the mouse, but the clicks and the keystrokes fail. Some background applications still operate (I could see a blinking cursor on a gnome-terminal), but there is no way to interact with them.
However I can switch to the text mode consoles (Alt+Ctrl+F1 or F2...). Sometimes I can type in, but I does not last long (just the time to type my login, no chance to type the password - If I ever get the password prompt). At this point, I could use SysRq. You find 3 files attached. I noticed that both Cpu stacks are at: cpuidle_idle_call+0xab/0x1d0 Before that, I noticed that (may its normal): When I put the laptop on battery [ 116.498481] Monitor-Mwait will be used to enter C-3 state [ 116.861874] EXT4-fs (sda3): re-mounted. Opts: errors=remount-ro,commit=600 [ 116.866674] EXT4-fs (sda6): re-mounted. Opts: commit=600 I've let the laptop alone for a few seconds and I got that. [ 151.580090] CE: hpet increased min_delta_ns to 20113 nsec ** Attachment added: "backtrace of all active CPUs" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/898852/+attachment/2618088/+files/backtrace%20of%20all%20active%20CPUs -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/898852 Title: Kernel freeze when on battery - Compaq nc6400 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/898852/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
