From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.5) Gecko/20041111 Firefox/1.0 Description of problem: On my HP TC1100 (Tablet PC) the ACPI power button is recognized but pressing it does not result in a proper button/power event which can be used by acpid to power down the machine. Running the kernel with ACPI debugging enabled shows some GPE activity when I press the button. BTW the button does not work with previous kernel versions either. Version-Release number of selected component (if applicable): kernel-2.6.10-1.741_FC3 How reproducible: Always Steps to Reproduce: 1. Press power button when booted in FC3 2. == nothing happens == 3. Actual Results: Nothing happens. /var/log/acpid does not show the expected event. Expected Results: Machine should power down via ACPI event. Additional info:
An update has been released for Fedora Core 3 (kernel-2.6.12-1.1372_FC3) which may contain a fix for your problem. Please update to this new kernel, and report whether or not it fixes your problem. If you have updated to Fedora Core 4 since this bug was opened, and the problem still occurs with the latest updates for that release, please change the version field of this bug to 'fc4'. Thank you.
I've updated to kernel 2.6.12-1.1372. Unfortunately pressing the power button does not result in a button/power ACPI event. I can only see battery events in /var/log/acpid.
More current kernels seem to detect the power button twice: ACPI: Power Button (FF) [PWRF] ACPI: Power Button (CM) [PWRB] Checking the acpid logs, the latter seems to be responsible for the now working power button..case closed!