Re: [patch] fix magic sysrq on strange keyboards

[Andrew Morton <akpm@osdl.org>]

Pavel Machek <pavel@suse.cz> wrote:
>
> Magic sysrq fails to work on many keyboards, particulary most of
>  notebook keyboards. This should help...
> 
>  The idea is quite simple: Discard the SysRq break code if Alt is still
>  being held down. This way the broken keyboard can send the break code
>  (or the user with a normal keyboard can release the SysRq key) and the
>  kernel waits until the next key is pressed or the Alt key is released.
> 
>  From: Fredrik Roubert <roubert@df.lth.se>
>  Signed-off-by: Pavel Machek <pavel@suse.cz>
> 

What kernel are you patching here?


>  index 5d84839..4602cf3 100644
>  --- a/drivers/char/keyboard.c
>  +++ b/drivers/char/keyboard.c
>  @@ -149,7 +149,8 @@ unsigned char kbd_sysrq_xlate[KEY_MAX + 
>           "\206\207\210\211\212\000\000789-456+1"         /* 0x40 - 0x4f */
>           "230\177\000\000\213\214\000\000\000\000\000\000\000\000\000\000" /* 0x50 - 0x5f */
>           "\r\000/";                                      /* 0x60 - 0x6f */
>  -static int was_sysrq;
>  +static int sysrq_down;
>  +static int sysrq_alt_use;

bix:/usr/src/linux-2.6.17-rc4> grep was_sysrq drivers/char/sysrq.c
bix:/usr/src/linux-2.6.17-rc4>