Public bug reported:
I noticed strange behavior from my Ubuntu system. While left idle, the
screensaver would shut off with no interaction with the machine. While
using the machine, webpages would zoom in or out when trying to scroll,
and command windows would open while typing.
Using xev, I found that these events corresponded with ALt_L, Control_L
and Shift_R events, even though those buttons were not being pressed.
I'm attaching a xev log, searching for _L will show the events.
((Shift_R events are, for some reason, much rarer and do not occur in
the particular log I'm adding.) In many (but not all) incidents, the
KeyRelease event occurs without a preceding KeyPress event. This
problem starts a variable period of time after booting the machine;
generally within 4 hours. Once it starts, it persists until a reboot.
Disabling the trackpad with xinput will stop the problem for several
hours, but eventually something re-enables the trackpad and the problem
reappears.
Running memtest on the box generates an error when one specific core
runs one specific test, but I cannot rule out that being related to
memtest's problems with UEFI systems. (See
passmark.com/forum/showthread.php?5638 for info on my memtest results
and the UEFI issues.) I returned the machine to HP for service. They
replaced the keyboard, trackpad and memory. This did not resolve the
problem.
I've recreated the problem in UbuntuMate, Ubuntu, and Debian, on both
3.x and 4.x kernels. I cannot reliably reproduce the issue on the
Windows partition on the same box; I think I might have seen it once or
twice while working on the machine, but can't rule out accidental
keypresses by me at those times. Leaving a keylogger running for over
24 hours on the Windows partition did not show any unexpected keyboard
events.
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: xorg 1:7.7+7ubuntu4
ProcVersionSignature: Ubuntu 3.19.0-43.49-generic 3.19.8-ckt10
Uname: Linux 3.19.0-43-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.17.2-0ubuntu1.8
Architecture: amd64
CompizPlugins: No value set for
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: MATE
Date: Fri Jan 22 21:36:14 2016
DistUpgraded: Fresh install
DistroCodename: vivid
DistroVariant: ubuntu
DkmsStatus:
fglrx-core, 15.200, 3.19.0-32-generic, x86_64: installed
fglrx-core, 15.200, 3.19.0-33-generic, x86_64: installed
fglrx-core, 15.200, 3.19.0-42-generic, x86_64: installed
fglrx-core, 15.200, 3.19.0-43-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
Advanced Micro Devices, Inc. [AMD/ATI] Device [1002:9874] (rev c5) (prog-if 00
[VGA controller])
Subsystem: Hewlett-Packard Company Device [103c:80af]
InstallationDate: Installed on 2015-10-30 (84 days ago)
InstallationMedia: Ubuntu-MATE 15.04 "Vivid Vervet" - Release amd64 (20150422.1)
LightdmGreeterLog:
** (lightdm-gtk-greeter:938): WARNING **: [PIDs] Failed to execute command:
upstart
** (lightdm-gtk-greeter:938): WARNING **: Failed to load user image: Failed to
open file '/home/jbhelfrich/.face': No such file or directory
LightdmGreeterLogOld:
** (lightdm-gtk-greeter:1191): WARNING **: [PIDs] Failed to execute command:
upstart
** (lightdm-gtk-greeter:1191): WARNING **: Failed to load user image: Failed
to open file '/home/jbhelfrich/.face': No such file or directory
MachineType: HP HP Pavilion Notebook
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-43-generic.efi.signed
root=UUID=613f6223-b665-4289-9dfa-7b003124dfdf ro quiet splash vt.handoff=7
SourcePackage: xorg
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/06/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F.13
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 80AF
dmi.board.vendor: HP
dmi.board.version: 81.28
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrF.13:bd08/06/2015:svnHP:pnHPPavilionNotebook:pvr:rvnHP:rn80AF:rvr81.28:cvnHP:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion Notebook
dmi.sys.vendor: HP
version.compiz: compiz 1:0.9.12.1+15.04.20150922-0ubuntu1
version.fglrx-installer: fglrx-installer N/A
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.60-2
version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.9-2ubuntu1~vivid2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.9-2ubuntu1~vivid2
version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917-1~exp1ubuntu2.3
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:1.0.11-1ubuntu2build1
xserver.bootTime: Thu
