Public bug reported: Hardware : ASUS K401L (K401LB5200) kernel: Linux biscuit 3.19.0-30-generic #34~14.04.1-Ubuntu SMP Fri Oct 2 22:09:39 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
When the system startup, the touchpad works well, but after it resumed from a suspend, the touchpad hardware will disappear from xinput and cat /proc/bus/input/devices. Before suspend, xinput output ⎡ Virtual core pointer id=2 [master pointer (3)] ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)] ⎜ ↳ USB OPTICAL MOUSE id=10 [slave pointer (2)] ⎜ ↳ ETPS/2 Elantech Touchpad id=14 [slave pointer (2)] ⎣ Virtual core keyboard id=3 [master keyboard (2)] ↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)] ↳ Power Button id=6 [slave keyboard (3)] ↳ Video Bus id=7 [slave keyboard (3)] ↳ Video Bus id=8 [slave keyboard (3)] ↳ Sleep Button id=9 [slave keyboard (3)] ↳ USB2.0 VGA UVC WebCam id=11 [slave keyboard (3)] ↳ Asus WMI hotkeys id=12 [slave keyboard (3)] ↳ AT Translated Set 2 keyboard id=13 [slave keyboard (3)] after suspend, the output ⎡ Virtual core pointer id=2 [master pointer (3)] ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)] ⎜ ↳ USB OPTICAL MOUSE id=10 [slave pointer (2)] ⎣ Virtual core keyboard id=3 [master keyboard (2)] ↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)] ↳ Power Button id=6 [slave keyboard (3)] ↳ Video Bus id=7 [slave keyboard (3)] ↳ Video Bus id=8 [slave keyboard (3)] ↳ Sleep Button id=9 [slave keyboard (3)] ↳ USB2.0 VGA UVC WebCam id=11 [slave keyboard (3)] ↳ Asus WMI hotkeys id=12 [slave keyboard (3)] ↳ AT Translated Set 2 keyboard id=13 [slave keyboard (3)] And you can find that the " ETPS/2 Elantech Touchpad" is missing After a reboot, everything works well again. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.19.0-30-generic 3.19.0-30.34~14.04.1 ProcVersionSignature: Ubuntu 3.19.0-30.34~14.04.1-generic 3.19.8-ckt6 Uname: Linux 3.19.0-30-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.15 Architecture: amd64 CurrentDesktop: Unity Date: Thu Oct 15 15:54:20 2015 InstallationDate: Installed on 2015-10-14 (0 days ago) InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805) SourcePackage: linux-lts-vivid UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: linux-lts-vivid (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug trusty ** Attachment added: "futher info before and after suspend" https://bugs.launchpad.net/bugs/1506363/+attachment/4495416/+files/k401l_touchpad_die.tar.gz -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1506363 Title: Touchpad die after resume from suspend(s2ram) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-vivid/+bug/1506363/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs