** Description changed: From kernel-3.6 there is in-kernel support for suspend to both (AKA hybrid suspend). Working patches can be found at https://bugs.freedesktop.org/show_bug.cgi?id=52572 (or links). + + + [Impact] + + * Ubuntu 12.04 implements hybrid suspend differently. It suspends first and wakes up + the computer for hibernation 15 minutes later. This is risky since the computer may be + carried when the wakeup happens. The hard disk may experience physical shocks and get + damaged. + + * Thus, it is desirable to have a real hybrid suspend implementation. In-kernel hybrid + suspend has been supported since kernel 3.6+. pm-utils only needs a small patch to + enable this feature. + + + [Test Case] + + * Ensure all Ubuntu 12.04 packages are up-to-date in the test environment. + Install pm-utils 1.4.1-9ubuntu1 + Install linux-image-lts-raring + + * Reboot the computer with lts-raring kernel. Run the command: 'pm-suspend-hybrid' from a + terminal. After the computer suspends, press the power button. It should be able to + resume from suspension correctly. + + * Run the command above again. After it suspends, remove and reconnect its power supply + (or its battery). Press the power button. It should be able to resume from hibernation + correctly. + + * Reboot with the default 3.2 kernel, Run the command above. + The computer should be able to suspend and then wake up for hibernation 15 minutes + later. + + + [Regression Potential] + + * This patch won't affect users who still use 3.2 kernel. It only enables in-kernel + hybrid suspend if the option 'suspend' is available from /sys/power/disk.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1172692 Title: Please implement in-kernel suspend to both To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1172692/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
