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Bug 65163 - KP_Fx keysyms generate wrong escape sequence
KP_Fx keysyms generate wrong escape sequence
Product: Red Hat Linux
Classification: Retired
Component: vte (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Nalin Dahyabhai
Depends On:
Blocks: 67218 79579
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Reported: 2002-05-18 17:49 EDT by Kenn Humborg
Modified: 2008-05-01 11:38 EDT (History)
1 user (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Last Closed: 2003-01-13 23:21:02 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Kenn Humborg 2002-05-18 17:49:28 EDT
Description of Problem:

Wrong escape sequences generated for KP_F1..KP_F4 keysyms

Version-Release number of selected component (if applicable):


How Reproducible:


Steps to Reproduce:
1. Open a gnome-terminal
2. At the shell prompt do 

    xmodmap -e "keycode 0x4D = KP_F1"

   This makes the Num Lock generate the KP_F1 keysym

3. At the shell prompt, hit Ctrl-V, NumLock.  You will


This should be ^[OP if the correct escape sequence was generated.

Actual Results:

   ESC [11~  to ESC [14~ are generated for KP_F1 to KP_F4

Expected Results:

   ESC OP  to ESC OS should be generated for KP_F1 to KP_F4

Additional Information:
   Keysyms KP_F1 to KP_F4 are never generated by the standard
   PC keyboard.  They correspond to the top row of the numeric
   keypad on DEC keyboards (like the LK201, LK401).  DEC terminals
   such as the VT100, VT220 label these keys as PF1 to PF4.

   They certainly have no connection with the F1 to F4 keysyms
   which correspond to the PC keyboard's F1 to F4 keys.

   For various reasons, I remap the top row of my PC's numeric
   keypad to KP_F1 to KP_F4.  In an xterm, these keys will then
   generate ESC OP, etc.

   However, as part of a RedHat-specific patch to gnome-libs
   (gnome-libs-1.2.13-zvthomeend.patch), the KP_Fx keysyms
   are mishandled.

   In fact, the standard GNOME-supplied zvtterm.c doesn't 
   quite get it right either, because it treats F1 to F4
   the same as KP_F1 to KP_F4, while it should really be
   treating them the way you guys treat KP_Fx.  Confused?
   No matter - that's something I can take up with the
   GNOME guys myself.

   In the meantime, there is a problem with gnome-libs in 
   that libzvt doesn't act like a VT100.  And your patch
   actually makes it worse...

   You should modify your patch to leave KP_F1/2/3/4 always
   generating ESC OP/Q/R/S.  This should be safe, because
   the standard PC keymaps will never generate KP_F1/2/3/4
   keysyms, so no other users will be affected by it.

   And it will mean that I don't need to patch gnome-libs
   every time you update it.
Comment 1 Havoc Pennington 2002-05-18 19:31:51 EDT
Most likely we're just dumping libzvt in favor of a new widget in the next
release. cc'ing Nalin so he's aware of this issue when working on that.
Comment 2 Kenn Humborg 2002-05-18 22:26:18 EDT
Hmm, interesting...

Got any more info on that?  What are they going to
use instead?
Comment 3 Havoc Pennington 2002-05-19 10:49:57 EDT
It's another widget called "vte", it's in GNOME CVS. Requires GNOME 2 version of 
gnome-terminal built configure --with-widget=vte.
Comment 4 Havoc Pennington 2002-07-06 22:41:08 EDT
Needs testing with VTE.
Comment 5 Jens Petersen 2002-08-29 08:15:06 EDT
FWIW the right sequence still doesn't seem to be generated with vte-0.8.10-1.
Comment 6 Nalin Dahyabhai 2003-01-13 23:21:02 EST
We should be properly emulating the various different function key modes of
XTerm in vte 0.9.2 and later.  Please reopen if you continue to see problems
with the version in Raw Hide or in gnome.org's CVS.
Comment 7 Kenn Humborg 2003-01-14 17:43:01 EST
Will vte 0.9.2 ship with Red Hat 8.1?

I don't have a recent enough Red Hat box to test Raw Hide
stuff on (yet).  Sorry.

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