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[Bug 1471123] Re: suddenly tabulator-key stops working normally

To: desktop-packages@xxxxxxxxxxxxxxxxxxx
From: Aapo Rantalainen <1471123@xxxxxxxxxxxxxxxxxx>
Date: Fri, 03 Jul 2015 07:26:37 -0000
Reply-to: Bug 1471123 <1471123@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
** Description changed:

  Ubuntu 14.04
  xserver-xorg: 1:7.7+1ubuntu8.1
  
  I don't know how to trigger this bug, but I have seen it now more than
  ten times.
  
  "Suddenly" = I can't figure pattern how this triggers. Sometimes it
  happens when computer just idles
  
  'stops working normally' = tab-key alone doesn't do anything.
  
  --
  When tab-key is working normally, xev reports:
  
  KeyPress event, serial 37, synthetic NO, window 0x2400001,
-     root 0x290, subw 0x0, time 2088488, (164,-6), root:(1515,797),
-     state 0x0, keycode 23 (keysym 0xff09, Tab), same_screen YES,
-     XLookupString gives 1 bytes: (09) " "
-     XmbLookupString gives 1 bytes: (09) " "
-     XFilterEvent returns: False
+     root 0x290, subw 0x0, time 2088488, (164,-6), root:(1515,797),
+     state 0x0, keycode 23 (keysym 0xff09, Tab), same_screen YES,
+     XLookupString gives 1 bytes: (09) " "
+     XmbLookupString gives 1 bytes: (09) " "
+     XFilterEvent returns: False
  
  KeyRelease event, serial 37, synthetic NO, window 0x2400001,
-     root 0x290, subw 0x0, time 2088509, (164,-6), root:(1515,797),
-     state 0x0, keycode 23 (keysym 0xff09, Tab), same_screen YES,
-     XLookupString gives 1 bytes: (09) " "
-     XFilterEvent returns: False
+     root 0x290, subw 0x0, time 2088509, (164,-6), root:(1515,797),
+     state 0x0, keycode 23 (keysym 0xff09, Tab), same_screen YES,
+     XLookupString gives 1 bytes: (09) " "
+     XFilterEvent returns: False
  
  --
  When this bug triggers, xev reports (when tab-key pressed and released):
  
  FocusOut event, serial 37, synthetic NO, window 0x5600001,
-     mode NotifyGrab, detail NotifyAncestor
+     mode NotifyGrab, detail NotifyAncestor
  
  FocusIn event, serial 37, synthetic NO, window 0x5600001,
-     mode NotifyUngrab, detail NotifyAncestor
+     mode NotifyUngrab, detail NotifyAncestor
  
  KeymapNotify event, serial 37, synthetic NO, window 0x0,
-     keys: 4294967184 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-            0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
+     keys: 4294967184 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
+            0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  
  --
  When this bug triggers, xev reports (when holding CTRL and tab-key pressed and released):
  
  KeyPress event, serial 37, synthetic NO, window 0x5600001,
-     root 0x290, subw 0x0, time 261350060, (172,-19), root:(1523,784),
-     state 0x0, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
-     XLookupString gives 0 bytes:
-     XmbLookupString gives 0 bytes:
-     XFilterEvent returns: False
+     root 0x290, subw 0x0, time 261350060, (172,-19), root:(1523,784),
+     state 0x0, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
+     XLookupString gives 0 bytes:
+     XmbLookupString gives 0 bytes:
+     XFilterEvent returns: False
  
  KeyPress event, serial 37, synthetic NO, window 0x5600001,
-     root 0x290, subw 0x0, time 261350228, (172,-19), root:(1523,784),
-     state 0x4, keycode 23 (keysym 0xff09, Tab), same_screen YES,
-     XLookupString gives 1 bytes: (09) " "
-     XmbLookupString gives 1 bytes: (09) " "
-     XFilterEvent returns: False
+     root 0x290, subw 0x0, time 261350228, (172,-19), root:(1523,784),
+     state 0x4, keycode 23 (keysym 0xff09, Tab), same_screen YES,
+     XLookupString gives 1 bytes: (09) " "
+     XmbLookupString gives 1 bytes: (09) " "
+     XFilterEvent returns: False
  
  KeyRelease event, serial 37, synthetic NO, window 0x5600001,
-     root 0x290, subw 0x0, time 261350276, (172,-19), root:(1523,784),
-     state 0x4, keycode 23 (keysym 0xff09, Tab), same_screen YES,
-     XLookupString gives 1 bytes: (09) " "
-     XFilterEvent returns: False
+     root 0x290, subw 0x0, time 261350276, (172,-19), root:(1523,784),
+     state 0x4, keycode 23 (keysym 0xff09, Tab), same_screen YES,
+     XLookupString gives 1 bytes: (09) " "
+     XFilterEvent returns: False
  
  KeyRelease event, serial 37, synthetic NO, window 0x5600001,
-     root 0x290, subw 0x0, time 261350572, (172,-19), root:(1523,784),
-     state 0x4, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
-     XLookupString gives 0 bytes:
-     XFilterEvent returns: False
+     root 0x290, subw 0x0, time 261350572, (172,-19), root:(1523,784),
+     state 0x4, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
+     XLookupString gives 0 bytes:
+     XFilterEvent returns: False
  ---
  And behaviour is like xev reports: tab pressed alone doesn't do anything, but with any modifier it works as expected:
  alt+tab = change window
  shift+tab = previous element (e.g. fields in browser)
  ctrl+tab = change tab (e.g. in firefox)
  
  -----
  I have ~/.Xmodmap and it contains line:
  keycode 23 = Tab ISO_Left_Tab Tab ISO_Left_Tab Tab ISO_Left_Tab
  
  Running xmodmap ~/.Xmodmap will not fix.
  
  ---
  Attaching new usb-keyboard doesn't help.
  ---
  Reboot helps.
- 
+ Restarting xorg helps.
  ---
  Changing to virtual terminal -> tab is working. But after returning to xorg, tab is still broken.

-- 
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Packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1471123

Title:
  suddenly tabulator-key stops working normally

Status in xorg package in Ubuntu:
  New

Bug description:
  Ubuntu 14.04
  xserver-xorg: 1:7.7+1ubuntu8.1

  I don't know how to trigger this bug, but I have seen it now more than
  ten times.

  "Suddenly" = I can't figure pattern how this triggers. Sometimes it
  happens when computer just idles

  'stops working normally' = tab-key alone doesn't do anything.

  --
  When tab-key is working normally, xev reports:

  KeyPress event, serial 37, synthetic NO, window 0x2400001,
      root 0x290, subw 0x0, time 2088488, (164,-6), root:(1515,797),
      state 0x0, keycode 23 (keysym 0xff09, Tab), same_screen YES,
      XLookupString gives 1 bytes: (09) " "
      XmbLookupString gives 1 bytes: (09) " "
      XFilterEvent returns: False

  KeyRelease event, serial 37, synthetic NO, window 0x2400001,
      root 0x290, subw 0x0, time 2088509, (164,-6), root:(1515,797),
      state 0x0, keycode 23 (keysym 0xff09, Tab), same_screen YES,
      XLookupString gives 1 bytes: (09) " "
      XFilterEvent returns: False

  --
  When this bug triggers, xev reports (when tab-key pressed and released):

  FocusOut event, serial 37, synthetic NO, window 0x5600001,
      mode NotifyGrab, detail NotifyAncestor

  FocusIn event, serial 37, synthetic NO, window 0x5600001,
      mode NotifyUngrab, detail NotifyAncestor

  KeymapNotify event, serial 37, synthetic NO, window 0x0,
      keys: 4294967184 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
             0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

  --
  When this bug triggers, xev reports (when holding CTRL and tab-key pressed and released):

  KeyPress event, serial 37, synthetic NO, window 0x5600001,
      root 0x290, subw 0x0, time 261350060, (172,-19), root:(1523,784),
      state 0x0, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
      XLookupString gives 0 bytes:
      XmbLookupString gives 0 bytes:
      XFilterEvent returns: False

  KeyPress event, serial 37, synthetic NO, window 0x5600001,
      root 0x290, subw 0x0, time 261350228, (172,-19), root:(1523,784),
      state 0x4, keycode 23 (keysym 0xff09, Tab), same_screen YES,
      XLookupString gives 1 bytes: (09) " "
      XmbLookupString gives 1 bytes: (09) " "
      XFilterEvent returns: False

  KeyRelease event, serial 37, synthetic NO, window 0x5600001,
      root 0x290, subw 0x0, time 261350276, (172,-19), root:(1523,784),
      state 0x4, keycode 23 (keysym 0xff09, Tab), same_screen YES,
      XLookupString gives 1 bytes: (09) " "
      XFilterEvent returns: False

  KeyRelease event, serial 37, synthetic NO, window 0x5600001,
      root 0x290, subw 0x0, time 261350572, (172,-19), root:(1523,784),
      state 0x4, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
      XLookupString gives 0 bytes:
      XFilterEvent returns: False
  ---
  And behaviour is like xev reports: tab pressed alone doesn't do anything, but with any modifier it works as expected:
  alt+tab = change window
  shift+tab = previous element (e.g. fields in browser)
  ctrl+tab = change tab (e.g. in firefox)

  -----
  I have ~/.Xmodmap and it contains line:
  keycode 23 = Tab ISO_Left_Tab Tab ISO_Left_Tab Tab ISO_Left_Tab

  Running xmodmap ~/.Xmodmap will not fix.

  ---
  Attaching new usb-keyboard doesn't help.
  ---
  Reboot helps.
  Restarting xorg helps.
  ---
  Changing to virtual terminal -> tab is working. But after returning to xorg, tab is still broken.

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References

[Bug 1471123] [NEW] suddenly tabulator-key stops working normally
From: Aapo Rantalainen, 2015-07-03