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[Chris Bainbridge <chris.bainbridge@xxxxxxxxx>]

*** This bug is a duplicate of bug 1057769 ***
    https://bugs.launchpad.net/bugs/1057769

** This bug has been marked a duplicate of bug 1057769
   Firefox key up / down / page up / page down don't work in web page

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https://bugs.launchpad.net/bugs/1108185

Title:
  Page up/dn keys stop working on a page

Status in firefox package in Ubuntu:
  Confirmed

Bug description:
  Occasionally Firefox stops responding to my keyboard's page up/down
  keys. When this happens, it only affects a single page. Page up/down
  will keep working in other tabs. Reloading the page or navigating to a
  new page is enough to clear the problem. I can reproduce this most
  frequently with launchpad bug pages. When this happens, the scroll
  bars continue to function and so does the scroll wheel on my mouse;
  it's just the page up/dn keys that stop working. It's not a focus
  problem; clicking inside the browser window to ensure it has focus
  does not help.

  To reproduce:
  1) Open a few browser tabs
  2) In one tab, load a launchpad bug page like https://bugs.launchpad.net/ubuntu/+source/linux-lts-quantal/+bug/1088454
  3) Use page up/down on your keyboard to scroll the page up/down

  Expected results:
  The page up/down keys scroll the page up/down

  Actual results:
  The page up/down keys have no discernable effect on the affected browser tab

  
  If I had to guess I'd say this happens on about 0.1-0.5% of the web pages I load, which is enough to see it a few times a week.

  I observed the problem in FF 18 on 12.10. It happens in FF 19 on 13.04
  too

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: firefox 19.0~b2+build1-0ubuntu1
  ProcVersionSignature: Ubuntu 3.8.0-1.5-generic 3.8.0-rc4
  Uname: Linux 3.8.0-1-generic x86_64
  NonfreeKernelModules: nvidia
  AddonCompatCheckDisabled: False
  ApportVersion: 2.8-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  steve      2350 F.... pulseaudio
   /dev/snd/pcmC0D0p:   steve      2350 F...m pulseaudio
  BuildID: 20130117090125
  Channel: Unavailable
  Date: Mon Jan 28 14:47:57 2013
  ForcedLayersAccel: False
  IfupdownConfig:
   auto lo
   iface lo inet loopback
  InstallationDate: Installed on 2010-09-17 (864 days ago)
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Beta amd64 (20100901.1)
  IpRoute:
   default via 10.0.1.1 dev wlan0  proto static 
   10.0.1.0/24 dev wlan0  proto kernel  scope link  src 10.0.1.121  metric 9 
   169.254.0.0/16 dev wlan0  scope link  metric 1000
  MarkForUpload: True
  MostRecentCrashID: bp-f68bddea-16ef-4f42-bc63-916352121120
  Plugins:
   iTunes Application Detector - /usr/lib/mozilla/plugins/librhythmbox-itms-detection-plugin.so (rhythmbox-mozilla)
   Google Talk Plugin Video Accelerator - /opt/google/talkplugin/libnpgtpo3dautoplugin.so (google-talkplugin)
   Google Talk Plugin - /opt/google/talkplugin/libnpgoogletalk.so (google-talkplugin)
   Shockwave Flash - /usr/lib/mozilla/plugins/libflashplayer.so
   HP Virtual Rooms Plug-in - [HomeDir]/.mozilla/plugins/hpvirtualrooms-plugin.so
  PrefSources: prefs.js
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  Profiles: Profile0 (Default) - LastVersion=19.0/20130117090125 (In use)
  RelatedPackageVersions:
   rhythmbox-mozilla 2.98-0ubuntu3
   google-talkplugin 3.10.2.0-1
  RfKill:
   1: phy1: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  RunningIncompatibleAddons: False
  SourcePackage: firefox
  UpgradeStatus: Upgraded to raring on 2013-01-25 (3 days ago)
  dmi.bios.date: 03/05/08
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP31.88Z.0070.B07.0803051658
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Mac-F4238BC8
  dmi.board.vendor: Apple Inc.
  dmi.board.version: PVT
  dmi.chassis.asset.tag: Asset Tag#
  dmi.chassis.type: 2
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-F4238BC8
  dmi.modalias: dmi:bvnAppleInc.:bvrMBP31.88Z.0070.B07.0803051658:bd03/05/08:svnAppleInc.:pnMacBookPro3,1:pvr1.0:rvnAppleInc.:rnMac-F4238BC8:rvrPVT:cvnAppleInc.:ct2:cvrMac-F4238BC8:
  dmi.product.name: MacBookPro3,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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