[LG Electronics LW25-B7HV] Keyboard not working

[Joonas Saarinen]

Keyboard on an LG LW25 laptop is not functional anymore on Ubuntu 13.10. Any 3.8.x Ubuntu kernel works fine. Starting with 3.9.0, the keyboard breaks. External keyboards are still fine. A kernel bisect suggests that the first bad commit is:
be2d7e4233a4fe439125b825470020cef83407d5
Input: atkbd - fix multi-byte scancode handling on reconnect

WORKAROUND: Use kernel parameter i8042.dumbkbd=1

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: linux-image-3.11.0-13-generic 3.11.0-13.20
ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6
Uname: Linux 3.11.0-13-generic i686
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: joonas 1557 F.... pulseaudio
CurrentDmesg: [ 36.874560] init: cups-browsed main process ended, respawning
Date: Mon Dec 2 06:53:57 2013
HibernationDevice: RESUME=UUID=07de3f8c-11e5-4fa3-a097-47cee4c8a90f
InstallationDate: Installed on 2013-11-25 (6 days ago)
InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Release i386 (20131016)
MachineType: LG Electronics LW25-B7HV
MarkForUpload: True
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-13-generic root=UUID=db674b31-c58d-4cc7-b622-9e3a17baf01c ro quiet splash i8042.dumbkbd=1 vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.11.0-13-generic N/A
 linux-backports-modules-3.11.0-13-generic N/A
 linux-firmware 1.116
SourcePackage: linux
StagingDrivers: et131x
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/25/2006
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: WRRESF03
dmi.board.name: WindRiver NAPA
dmi.board.vendor: LG Electronics
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LG Electronics
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrWRRESF03:bd03/25/2006:svnLGElectronics:pnLW25-B7HV:pvrNotApplicable:rvnLGElectronics:rnWindRiverNAPA:rvrNotApplicable:cvnLGElectronics:ct10:cvrN/A:
dmi.product.name: LW25-B7HV
dmi.product.version: Not Applicable
dmi.sys.vendor: LG Electronics

[Brad Figg (brad-figg)]

This change was made by a bot.

[Dave Gilbert (ubuntu-treblig)]

I'd like to suggest something;
   It should be possible to build a ppa'd kernel with just that change reverted, then that kernel could be used to see if other apparently similar bugs (like bug 1243904) are actually the same issue without other users having to do the same bisect (especially if they're not technically comfortable doing them).

I'd note that I triaged 1243904 to 'high' on the basis of the bugs/importance entry of 'A problem with an essential hardware component (disk controller, built-in networking, video card, keyboard, mouse)'

[Joonas Saarinen (jza)]

A tested patch for this bug for this laptop was made in bug 1243904, so I am marking this as a duplicate. We should continue the discussion there.

[penalvch (penalvch)]

Joonas Saarinen, it wouldn't be considered a duplicate as the original reporter of bug 1243904 hasn't advised if the patch has addressed their issue.