All
It's a brave soul that takes on these keyboard issues. Vincent DEDIEU's
contribution raises a question for me:
Why is the keyboard map held in Xvnc (where the frame buffer is), and
not in vncviewer (where the keyboard *IS*) ? I can connect to my Xvnc
session from several different machines, each with a different keyboard;
how can one keymap be correct for all of them?
I'm afraid this is an idle suggestion borne out of much head scratching
over the path of a keypress to an application. It occurs to me the X11
designers had great insight to introduce X_keysyms, and tragicly dim
sight to then also pass the keycode to the X client. I suspect a clean
answer would be for Xvnc and vncviewer to talk in terms of VNC_keysyms,
and these would have to be a superset of keysyms from the various
platforms: X11, MSwindows, Mac...
Vincent DEDIEU wrote:
>
> Hello,
>
> I noticed a very strange keyboard behavior with the Xvnc.
>
> I am using a French keyboard. When I press the key 'asterisk' (located at
> the left of <return> on a French keyboard), I get an '*'. OK. But if I run
> the xev utility to know keyboard events generated by this, I get the
> following:
> pressing <Shift Left>
> pressing <8> (above U and I)
> releasing <8>
> releasing <Shift Left>
>
> This very strange behavior is inherited from a US keyboard (to get an
> asterisk with an US keyboard, <Shift><8> is pressed).
>
> You can say, this behavior is not very important because in final when <*>
> is pressed, an <*> is got by an X application (xterm, kde ...).
>
> But some X applications take care to the real keyboard event (they use
> keycode instead of keysym). And in this case only a US keyboard can be
> correctly use with the VNC server.
>
> To solve this problem I modified the Xvnc source code (where a US keymap is
> hard coded). I added a French and a UK keymap. Furthermore I specificied
> keysyms use by the numpad. (Then the xmodmap table is entirely filled by the
> Xvnc daemon itself).
>
> To use this, one of the following compilation option must be set (in
> /config/cf/xfree86.cf, variable Xfree86ServerDefines):
> -DNEW_US_KEYBOARD
> -DNEW_FR_KEYBOARD
> -DNEW_UK_KEYBOARD
>
> But I am not an expert in C language. So I think my modification could be
> improved:
>
> 1 - I used a compilation option, but to make life easiest I think it will
> be more elegant to offer a run-time option (Xvnc :1 -kbd fr ...) to set the
> correct keymap.
>
> 2 - The main difference between a vncviewer and the Linux box (if Xvnc is
> used on linux) are the keycodes. And when an X application is based on
> keycodes (instead of keysym), nothing works. So it could be a good idea to
> simulate a PC keyboard with a correct kbdMap in kbdptr.c.
>
> Please see below my 2 patches.
>
> Vincent
>
> ============= patching hw/vnc/kbdptr.c =========
> --- kbdptr.c.orig Wed Feb 7 10:29:57 2001
> +++ kbdptr.c Fri Feb 9 14:56:53 2001
> @@ -79,10 +79,13 @@
> XK_Alt_R, NoSymbol,
> #define ALT_R_KEY_CODE (MIN_KEY_CODE + 7)
>
> - /* Standard US keyboard */
>
> XK_space, NoSymbol,
> - XK_0, XK_parenright,
> +
> +#ifdef NEW_US_KBD
> + /* Standard US keyboard */
> +
> + XK_grave, XK_asciitilde,
> XK_1, XK_exclam,
> XK_2, XK_at,
> XK_3, XK_numbersign,
> @@ -92,6 +95,7 @@
> XK_7, XK_ampersand,
> XK_8, XK_asterisk,
> XK_9, XK_parenleft,
> + XK_0, XK_parenright,
>
> XK_minus, XK_underscore,
> XK_equal, XK_plus,
> @@ -99,11 +103,85 @@
> XK_bracketright, XK_braceright,
> XK_semicolon, XK_colon,
> XK_apostrophe, XK_quotedbl,
> - XK_grave, XK_asciitilde,
> XK_comma, XK_less,
> XK_period, XK_greater,
> XK_slash, XK_question,
> XK_backslash, XK_bar,
> +#endif
> +
> +#ifdef NEW_UK_KBD
> + /* UK keyboard */
> +
> + XK_grave, XK_notsign,
> + XK_1, XK_exclam,
> + XK_2, XK_quotedbl,
> + XK_3, XK_sterling,
> + XK_4, XK_dollar,
> + XK_5, XK_percent,
> + XK_6, XK_asciicircum,
> + XK_7, XK_ampersand,
> + XK_8, XK_asterisk,
> + XK_9, XK_parenleft,
> + XK_0, XK_parenright,
> +
> + XK_minus, XK_underscore,
> + XK_equal, XK_plus,
> +
> + XK_bracketleft, XK_braceleft,
> + XK_bracketright, XK_braceright,
> +
> + XK_semicolon, XK_colon,
> + XK_apostrophe, XK_at,
> + XK_comma, XK_less,
> + XK_period, XK_greater,
> + XK_slash, XK_question,
> + XK_backslash, XK_bar,
> + XK_numbersign, XK_asciitilde,
> +#endif
> +
> +#ifdef NEW_FR_KBD
> + /* French Keyboard */
> +
> + XK_twosuperior, NoSymbol,
> + XK_ampersand, XK_1,
> + XK_eacute, XK_2,
> + XK_quotedbl, XK_3,
> + XK_apostrophe, XK_4,
> + XK_parenleft, XK_5,
> + XK_minus, XK_6,
> + XK_egrave, XK_7,
> + XK_underscore, XK_8,
> + XK_ccedilla, XK_9,
> + XK_agrave, XK_0,
> + XK_parenright, XK_degree,
> + XK_equal, XK_plus,
> +
> + XK_dead_circumflex, XK_diaeresis,
> + XK_dollar, XK_sterling,
> +
> + XK_ugrave, XK_percent,
> + XK_asterisk, XK_mu,
> +
> + XK_less, XK_greater,
> + XK_comma, XK_question,
> + XK_semicolon, XK_period,
> + XK_colon, XK_slash,
> + XK_exclam, XK_section,
> +
> +/* special symbol accessed by AltGr */
> + XK_asciitilde, NoSymbol,
> + XK_numbersign, NoSymbol,
> + XK_braceleft, NoSymbol,
> + XK_bracketleft, NoSymbol,
> + XK_bar, NoSymbol,
> + XK_grave, NoSymbol,
> + XK_backslash, NoSymbol,
> + XK_asciicircum, NoSymbol,
> + XK_at, NoSymbol,
> + XK_bracketright, NoSymbol,
> + XK_braceright, NoSymbol,
> + XK_currency, NoSymbol,
> +#endif
>
> XK_a, XK_A,
> XK_b, XK_B,
> @@ -162,6 +240,37 @@
> XK_F11, NoSymbol,
> XK_F12, NoSymbol,
>
> +/* Num Pad */
> +
> + XK_Num_Lock, NoSymbol,
> + XK_KP_Divide, NoSymbol,
> + XK_KP_Multiply, NoSymbol,
> + XK_KP_Subtract, NoSymbol,
> + XK_KP_Home, NoSymbol,
> + XK_KP_Up, NoSymbol,
> + XK_KP_Page_Up, NoSymbol,
> + XK_KP_Add, NoSymbol,
> + XK_KP_Left, NoSymbol,
> + XK_KP_Begin, NoSymbol,
> + XK_KP_Right, NoSymbol,
> + XK_KP_End, NoSymbol,
> + XK_KP_Down, NoSymbol,
> + XK_KP_Page_Down, NoSymbol,
> + XK_KP_Enter, NoSymbol,
> + XK_KP_Insert, NoSymbol,
> + XK_KP_Delete, NoSymbol,
> + XK_KP_7, NoSymbol,
> + XK_KP_8, NoSymbol,
> + XK_KP_9, NoSymbol,
> + XK_KP_4, NoSymbol,
> + XK_KP_5, NoSymbol,
> + XK_KP_6, NoSymbol,
> + XK_KP_1, NoSymbol,
> + XK_KP_2, NoSymbol,
> + XK_KP_3, NoSymbol,
> + XK_KP_0, NoSymbol,
> + XK_KP_Decimal, NoSymbol,
> +
> /* Plus blank ones which can be filled in using xmodmap */
>
> };
>
> ============= patching hw/vnc/init.c =========
>
> --- init.c.orig Thu Feb 8 17:29:47 2001
> +++ init.c Thu Feb 8 17:31:19 2001
> @@ -858,6 +858,18 @@
> "instead)\n");
> ErrorF("-localhost only allow connections from
> localhost\n");
> ErrorF("-inetd Xvnc is launched by inetd\n");
> +#if defined (NEW_US_KBD) || defined (NEW_UK_KBD) || defined (NEW_FR_KBD)
> + ErrorF("\nNote: embedded keyboard mapping: ");
> +#if defined (NEW_US_KBD)
> + ErrorF("US\n");
> +#endif
> +#if defined (NEW_UK_KBD)
> + ErrorF("UK\n");
> +#endif
> +#if defined (NEW_FR_KBD)
> + ErrorF("FR\n");
> +#endif
> +#endif
> exit(1);
> }
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--
Regards, Mark.
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