Re: Keyboard problems: magic key + h stuck, and keyboard errors,stuck keys with 2.6.0-test5-bk3

[Herbert Poetzl <herbert@13thfloor.at>]

On Mon, Sep 15, 2003 at 02:12:21AM -0400, Shawn Starr wrote:
> I have two systems, When I turn the system next to me on the machine thats
> currently powered on spews out this each time, why is the magic key
> (alt+sysrq h) being dumped?
> 
> They are both connected via serial.

on a serial line, a break is ALT-SYSRQ, maybe
some process is restarted and then outputs
some characters, including a 'h' ...

HTH,
Herbert

> SysRq : HELP : loglevel0-8 reBoot Dumpmsgs tErm kIll saK showMem powerOff
> showPc unRaw Sync showTasks Unmount
> SysRq : HELP : loglevel0-8 reBoot Dumpmsgs tErm kIll saK showMem powerOff
> showPc unRaw Sync showTasks Unmount
> SysRq : HELP : loglevel0-8 reBoot Dumpmsgs tErm kIll saK showMem powerOff
> showPc unRaw Sync showTasks Unmount
> SysRq : HELP : loglevel0-8 reBoot Dumpmsgs tErm kIll saK showMem powerOff
> showPc unRaw Sync showTasks Unmount
> SysRq : HELP : loglevel0-8 reBoot Dumpmsgs tErm kIll saK showMem powerOff
> showPc unRaw Sync showTasks Unmount
> SysRq : HELP : loglevel0-8 reBoot Dumpmsgs tErm kIll saK showMem powerOff
> showPc unRaw Sync showTasks Unmount
> SysRq : HELP : loglevel0-8 reBoot Dumpmsgs tErm kIll saK showMem powerOff
> showPc unRaw Sync showTasks Unmount
> 
> I have run into race conditions with the two machines and serial
> connectivity in the past (see previous emails on that).
> 
> What would be the best way to determine why my systems cause so much
> problems wrt to serial connectivity?
> 
> Also, what is the best way to debug a kernel over serial when the system
> on the other end is completely locked?
> 
> The other issue is:
> 
> Dec  8 17:56:45 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0xb8, on isa0060/serio0) pressed.
> Dec  8 17:56:45 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0x9d, on isa0060/serio0) pressed.
> Feb 12 23:25:29 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0xae, on isa0060/serio0) pressed.
> Feb 17 02:09:26 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0xb8, on isa0060/serio0) pressed.
> Feb 20 23:06:04 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0x9d, on isa0060/serio0) pressed.Feb 22 01:45:55 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0x9d, on isa0060/serio0) pressed.
> Feb 24 18:33:37 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0xa0, on isa0060/serio0) pressed.
> Feb 27 00:09:52 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0x9d, on isa0060/serio0) pressed.
> Mar  5 00:49:59 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0xb8, on isa0060/serio0) pressed.
> Mar  5 00:49:59 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0x9d, on isa0060/serio0) pressed.
> ..........................
> 
> Sep  1 23:38:58 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0xc0, on isa0060/serio0) pressed.
> Sep  1 23:38:59 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0x9d, on isa0060/serio0) pressed.
> Sep  1 23:39:04 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0xc0, on isa0060/serio0) pressed.
> Sep  1 23:39:35 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0x9d, on isa0060/serio0) pressed.
> Sep 10 20:25:57 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0xa0, on isa0060/serio0) pressed.
> Sep 10 21:50:22 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0x9d, on isa0060/serio0) pressed.
> Sep 11 22:57:07 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0x9d, on isa0060/serio0) pressed.
> Sep 13 16:16:24 coredump kernel: atkbd.c: Unknown key (set 2, scancode 0x9c, on isa0060/serio0) pressed.
> 
> I have a small 4 port KVM switch from Startech, Is this KVM causing
> keyboard issues that the keyboard driver cannot interpret properly?
> 
> Why is this occuring so often? I can usually trigger this if I start using
> certain key combinations.
> 
> What also happens is a key will get 'stuck' and then repeat itself until I
> stop it from repeating the letter.
> 
> The keyboard is a Microsoft Internet keyboard PS/2 style plugged into the
> KVM.
> 
> If you want me to catch any debug output let me know and I will do this.
> 
> Thanks,
> 
> Shawn S.
> 
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