panic on powermac when enabling standard serial port support

From: Gwyn Judd (b.judd@xtra.co.nz)
Date: Sat May 20 2000 - 22:04:55 EST

I kept getting a kernel panic on boot just after pppd started up.
EVentually I fugured out it was because I had enabled "Standard/generic
(dumb) serial support" in the character devices menu as well as "Support
for PowerMac serial ports" in the "General Setup" menu. Perhaps these
two items should be mutually exclusive?

May 21 14:41:59 thislove kernel: PPP: version 2.3.7 (demand dialling)
May 21 14:41:59 thislove kernel: PPP line discipline registered.
May 21 14:41:59 thislove kernel: registered device ppp0
May 21 14:41:59 thislove pppd[765]: pppd 2.3.10 started by root, uid 0
May 21 14:42:00 thislove kernel: Serial driver version 4.27 with no
serial options enabled
May 21 14:42:00 thislove kernel: Machine check in kernel mode. (regs at
c0aafc30)
May 21 14:42:00 thislove kernel: Caused by (from srr1): Unknown values
in srr1
May 21 14:42:00 thislove kernel: NIP: C884A344 XER: 20000000 LR:
C884A330 REGS: c0aafc30 TRAP: 0200
May 21 14:42:00 thislove kernel: MSR: 00001030 [IRDRME]
May 21 14:42:00 thislove kernel: TASK = c0aae000[769] 'insmod' mm->pgd
c0ba0000 Last syscall: 128
May 21 14:42:00 thislove kernel: last math c0aae000
May 21 14:42:00 thislove kernel: GPR00: 000000FF C0AAFCE0 C0AAE000
00000001 00008000 000003FF C884B908 15000000
May 21 14:42:01 thislove kernel: GPR08: C00F0000 000003F9 00000DA0
FE000000 42244484 1001F2F0 C8849DAC C8849500
May 21 14:42:01 thislove kernel: GPR16: C8848A18 C8849620 C88460D8
C884604C C88490BC C8847F04 C8847FF4 C8847F3C
May 21 14:42:01 thislove kernel: GPR24: C8848AD4 C8847E54 C8847E48
00000000 00000000 00009032 C884B884 C0AAFCE8
May 21 14:42:01 thislove kernel: Call backtrace:
May 21 14:42:01 thislove kernel: C00F0000 C884AB48 C884AF5C C0019FEC
C0003928 10010000 100033F0
May 21 14:42:01 thislove kernel: 10003AB4 0FF0B69C 00000000
May 21 14:42:02 thislove kernel: Kernel panic: machine check
May 21 14:42:02 thislove sshd[770]: log: Server listening on port 22.

The weird thing was that after the panic the machine continued to boot
for a bit (as you can see from the tail of the log that sshd started up
followed by a login prompt appearing) before I got the "Rebooting in 180
seconds..." message. 

-- 
Gwyn Judd (b.judd@xtra.co.nz)
The best way to preserve a right is to exercise it, and the right to
smoke is a right worth dying for.

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This archive was generated by hypermail 2b29 : Tue May 23 2000 - 21:00:18 EST