Red Hat Bugzilla – Bug 193869
Unloading button.ko before S3 sleep makes notebook reboot on resume
Last modified: 2015-03-04 20:17:05 EST
Description of problem: Unloading the button.ko module shortly before suspending the notebook to RAM results in it cold-booting the next time the button is pressed. If button.ko is kept in memory, the problem is not seen. Version-Release number of selected component (if applicable): kernel 2.6.16-1.2111_FC4 How reproducible: Unload the button ACPI module before S3 (suspend-to-RAM) sleep (e.g., with the line SUSPEND_MODULES="... button ..." in /etc/sysconfig/pm), and initiate sleep. Steps to Reproduce: 1. Have button unloaded before sleep. 2. Sleep. 3. Wake up with Power button. Actual results: Machine cold boots (i.e., POSTs, goes to GRUB, system comes back up). Expected results: System springs back to original state.
[This comment added as part of a mass-update to all open FC4 kernel bugs] FC4 has now transitioned to the Fedora legacy project, which will continue to release security related updates for the kernel. As this bug is not security related, it is unlikely to be fixed in an update for FC4, and has been migrated to FC5. Please retest with Fedora Core 5. Thank you.
Still there in 2.6.17-1.2187_FC5. Maybe an EC quirk... is it really necessary to remove button.ko before suspending, or is there a better way to avoid processing spurious power button events on resume (e.g. fix the user-space utilities or have the kernel not pass up button events to user space if they were generated before complete resume)? (I've removed it, but occasionally see the "logout" box on resume, as if the event has been processed.)
A new kernel update has been released (Version: 2.6.18-1.2200.fc5) based upon a new upstream kernel release. Please retest against this new kernel, as a large number of patches go into each upstream release, possibly including changes that may address this problem. This bug has been placed in NEEDINFO state. Due to the large volume of inactive bugs in bugzilla, if this bug is still in this state in two weeks time, it will be closed. Should this bug still be relevant after this period, the reporter can reopen the bug at any time. Any other users on the Cc: list of this bug can request that the bug be reopened by adding a comment to the bug. In the last few updates, some users upgrading from FC4->FC5 have reported that installing a kernel update has left their systems unbootable. If you have been affected by this problem please check you only have one version of device-mapper & lvm2 installed. See bug 207474 for further details. If this bug is a problem preventing you from installing the release this version is filed against, please see bug 169613. If this bug has been fixed, but you are now experiencing a different problem, please file a separate bug for the new problem. Thank you.
Still there in kernel-2.6.18-1.2200.fc5.
With current kernels we shouldn't need to be unloading 'button' any more.