T23 lock up after enter KDB either on 6-STABLE or 7-CURRENT

[Robert Watson]

On Sun, 2 Jul 2006, Ren Zhen wrote:

> After I login, press Ctrl+Alt+ESC, kernel says:
> KDB: enter: manual escape to debugger
> [thread pid 16 tid 100014 ]
> Stopped at       kdb_enter+0x2b: nop
> db>
>
> Then, my T23 lock up. I can only switch off the computer.
>
> But, I use "boot -d" at booting kdb will work fine. I press c it continue. 
> When "login:" displayed on the screen, I enter the KDB, it lock up again.
>
> Both 6-STABLE and 7-CURRENT have this problem.
>
> My T23's model is 2647-4NC. Piii 1.13 256M*2 SDR. I have uninstalled one 
> DIMM, but it seems to have no help to this problem.

Try compiling out device kbdmux and see if that fixes things? There are 
reported problems regarding kbdmux's interaction with the debugger.

Robert N M Watson
Computer Laboratory
University of Cambridge

>
> My kernel configuration file is GENERIC with following debug options:
> options KDB
> options DDB
> options GDB
> options INVARIANTS
> options INVARIANT_SUPPORT
> options WITNESS
> options WITNESS_SKIPSPIN
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