kernel-packages team mailing list archive
-
kernel-packages team
-
Mailing list archive
-
Message #164049
[Bug 1532746] Re: SHIFT, ALT and CTRL problem with HP pavilion 15 ab062nl
I saved a dump of some seconds of the raw keyboard events doing:
cat /dev/input/event3 > /tmp/dump.bin
the result file can be downloaded from http://92.222.39.93/paolo/dump.bin (1.7 kb)
According to the kernel page at https://www.kernel.org/doc/Documentation/input/input.txt (see Event Interface chapter) I created a small C program to analyze the dump structure (can be found here: http://pastebin.com/RkMv0qJr).
An excerpt of the dump is this:
Time: 1456787793.748976 Type: 4 - Code: 4 - Value: 29
Time: 1456787793.748976 Type: 0 - Code: 0 - Value: 0
Time: 1456787793.750908 Type: 4 - Code: 4 - Value: 56
Time: 1456787793.750908 Type: 0 - Code: 0 - Value: 0
Time: 1456787793.754067 Type: 4 - Code: 4 - Value: 157
Time: 1456787793.754067 Type: 0 - Code: 0 - Value: 0
Time: 1456787793.756200 Type: 4 - Code: 4 - Value: 54
Time: 1456787793.756200 Type: 0 - Code: 0 - Value: 0
Time: 1456787793.759107 Type: 4 - Code: 4 - Value: 184
Time: 1456787793.759107 Type: 0 - Code: 0 - Value: 0
Time: 1456787795.307134 Type: 4 - Code: 4 - Value: 29
Time: 1456787795.307134 Type: 0 - Code: 0 - Value: 0
Time: 1456787795.308748 Type: 4 - Code: 4 - Value: 56
Time: 1456787795.308748 Type: 0 - Code: 0 - Value: 0
Time: 1456787795.311980 Type: 4 - Code: 4 - Value: 157
Time: 1456787795.311980 Type: 0 - Code: 0 - Value: 0
Time: 1456787795.313908 Type: 4 - Code: 4 - Value: 54
Time: 1456787795.313908 Type: 0 - Code: 0 - Value: 0
Time: 1456787795.317267 Type: 4 - Code: 4 - Value: 184
Time: 1456787795.317267 Type: 0 - Code: 0 - Value: 0
As I said, the computer was idling in the meantime the dump was taken.
As you see, every 1-2 seconds there is a pattern that repeats itself (the sequence repeats always in the same order).
In particular, Type 4 events are EV_MSC (see kernel docs at https://www.kernel.org/doc/Documentation/input/event-codes.txt) meaning "Miscellaneous events", and Code 4 subtype means MSC_SCAN (according to /usr/include/linux/input.h kernel file), which someway is used to "redefine" or map keyboard keys.
Values in the dump also are interesting, because apparently they are keystroke numbers and still according to /usr/include/linux/input.h they are:
29 -> KEY_LEFTCTRL
56 -> KEY_LEFTALT
157 -> KEY_COMPUTER
54 -> KEY_RIGHTSHIFT
184 -> KEY_F14
Curiously they are followed by a reserved event (type: 0), which is of
unknown usage to me.
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1532746
Title:
SHIFT, ALT and CTRL problem with HP pavilion 15 ab062nl
Status in linux package in Ubuntu:
Triaged
Bug description:
I've a problem with the keyboard of notebook HP Pavilion 15 ab062nl.
the problem is with SHIFT ALT and CTRL buttons of the keyboard.
for example when i use ALT-TAB shortcut, after few seconds, the ALT-TAB menu disappear as if i release ALT key, but isn't so.
another example is when i navigate on web, when i scroll page with mouse wheel, sometimes the page start to resize, as if i'm pressing CTRL command while scroll, or if i'm writing a text, sometimes, borwser launch shortcut, as if i'm pressing CTRL while i type text, for exaple if i'm typing "b" letter, opens bookmarks...
another example is while i'm typing text, if i press SHIFT key and
start typing, begins to write uppercase letters and after a while,
writes lowercase like I released shift, but i'm still pressing shift.
for example if i press SHIFT+s, the result is this:
SSSSSSSSSSSSSSsssssssssssssssssssssssssssssssss
some letters are uppercase, but others are lowercase.
i haven't found a solution.
the only way to solve momentarily the problem, is pressing for some seconds the only SHIFT key, after that, the problems disappears indefinitely, or until the next restart.
This problem occurs with all ubuntu version (x86 and x86_64), now i'm
using Ubuntu 15.10, but i've also tried ubuntu 15.04, ubuntu 14.04,
ubuntu 12.04, ubuntu 10.04.
furthermore i've this problem also with other GNU/Linux Distributions (i've tried Fedora, OpenSuse, ArchLinux, Antergos, Debian, SteamOS).
but isn't and hardware problem, because on Windows 8.1 and Windows 10 i haven't these problems.
i've also tried to plug in an externa USB keyboard, and if i use
external USB keybaord i haven't problems.
i think is a problem of compatibility, with integrated keyboard of
this notebook.
i've tried to monitor these problems using XEV, and the results is
that also if i'm not using notebook, sometimes XEV reads an INPUT of
one of these 3 key (SHIFT, ALT, CTRL), and while i'm pressing one of
these 3 key, XEV see also if i release and immedialty after press
again the key.
this is an example of the input while i press Left_ALT key for a while
KeyPress event, serial 37, synthetic NO, window 0x3e00001,
root 0x498, subw 0x0, time 129987, (-142,152), root:(452,476),
state 0x10, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyRelease event, serial 37, synthetic NO, window 0x3e00001,
root 0x498, subw 0x0, time 130147, (-142,152), root:(452,476),
state 0x18, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
KeyPress event, serial 37, synthetic NO, window 0x3e00001,
root 0x498, subw 0x0, time 130391, (-142,152), root:(452,476),
state 0x10, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
whole log here http://pastebin.com/CPGz40aw
and this is the output of xev, leaving the notebook on a few hours
without using it http://pastebin.com/sYSHAbGy
this is "xinput" output
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ Logitech USB Laser Mouse id=11 [slave pointer (2)]
⎜ ↳ SynPS/2 Synaptics TouchPad id=13 [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)]
↳ Power Button id=9 [slave keyboard (3)]
↳ HP Truevision HD id=10 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=12 [slave keyboard (3)]
↳ HP WMI hotkeys id=14 [slave keyboard (3)]
↳ HP Wireless hotkeys id=15 [slave keyboard (3)]
i hope that this bug can be solved
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-16-generic 4.2.0-16.19
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
ApportVersion: 2.19.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: ubuntu 1980 F.... pulseaudio
/dev/snd/controlC0: ubuntu 1980 F.... pulseaudio
CasperVersion: 1.365
CurrentDesktop: Unity
Date: Mon Jan 11 10:08:12 2016
LiveMediaBuild: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: Hewlett-Packard HP Pavilion Notebook
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/username.seed boot=casper quiet splash ---
RelatedPackageVersions:
linux-restricted-modules-4.2.0-16-generic N/A
linux-backports-modules-4.2.0-16-generic N/A
linux-firmware 1.149
SourcePackage: linux
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: 80B5
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 81.28
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF.13:bd08/06/2015:svnHewlett-Packard:pnHPPavilionNotebook:pvr:rvnHewlett-Packard:rn80B5:rvr81.28:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion Notebook
dmi.sys.vendor: Hewlett-Packard
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1532746/+subscriptions
References
