Re: [Qemu-devel] Keysymbol interpretation missing in QEMU's VNC server?

[Gonglei (Arei)]

Hi,
Would you give me some advice. Thanks!

I thank we can only need reserve four Qemu console,
Ctrl +1 for graphic show, Ctrl+2 for monitor console,
Ctrl + 3 for serial, Ctrl+4 for parallel. And then will not conflict with "de" 
keymay.

Best regards,
-Gonglei


> -----Original Message-----
> From: Gonglei (Arei)
> Sent: Tuesday, January 14, 2014 4:45 PM
> To: 'address@hidden'; 'Anthony Liguori'; 'Gerd Hoffmann'
> Cc: Luonengjun; Huangweidong (Hardware); address@hidden
> Subject: Re: [Qemu-devel] Keysymbol interpretation missing in QEMU's VNC
> server?
> 
> Hi,
> 
> > Just a small addition: The AltGr Keys are not routed correctly through VNC!
> > I had a look at the "de" keymap, it looks as if they are described (e.g.
> > backslash \) which is placed on the german keyboard on the key right to the
> > 0 key (german key ssharp) and accessed via AltGr + this key. Same with }
> > which is at the 0 key position accessed via AltGr + 0. The shifted keys and
> > the Windows standard functions Ctrl + C / Ctrl + V works as well.
> > They are not lost completely but the AltGr press gets lost! So when
> > pressing AltGr + 0, I get only a 0 on the guest instead of a "}".
> >
> > Any ideas?
> 
> By googled, I found the topic. and I encountered the same probleam.
> I am convinced that the AltGr key conflicted with the QEMU console switch.
> On the German keyboard, the AltGr as same with Ctrl + Alt on the US keyborad.
> Same as you said, the { accessed via AltGr + 7. But at present, the Ctrl + 
> Alt +
> 1..9
> are reserved as QEMU console switch. When we push down the AltGr + 7,
> do_key_event function will reset key and enter console_select for AltGr (Ctrl 
> +
> Alt),
> and finally we get the last key "7" instead of a "{".
> 
> the Qemu code(qemu/ui/vnc.c):
> static void do_key_event(VncState *vs, int down, int keycode, int sym)
> {
>     /* QEMU console switch */
>     switch(keycode) {
>     case 0x2a:                          /* Left Shift */
>     case 0x36:                          /* Right Shift */
>     case 0x1d:                          /* Left CTRL */
>     case 0x9d:                          /* Right CTRL */
>     case 0x38:                          /* Left ALT */
>     case 0xb8:                          /* Right ALT */
>         if (down)
>             vs->modifiers_state[keycode] = 1;
>         else
>             vs->modifiers_state[keycode] = 0;
>         break;
>     case 0x02 ... 0x0a: /* '1' to '9' keys */
>         if (down && vs->modifiers_state[0x1d] && vs->modifiers_state[0x38])
> {
>             /* Reset the modifiers sent to the current console */
>             reset_keys(vs);
>             console_select(keycode - 0x02);
>             return;
>         }
>         break;
>     ... ...
> }
> 
> Best regards,
> -Gonglei
>