-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Jeff Moyer wrote:
==> Regarding Re: [Wlug] HOWTO debug hard lockups; Andy Stewart <andystewart@comcast.net> adds:
andystewart> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
andystewart> Eric Martin wrote:
In reguards to seeing messages on minicom, what logger do you have installed? Can you just shovel kernel messages over to ttyS01? eg sudo tailf /var/log/kernel ttyS01
andystewart> I did that per your suggestion and it works just fine.
Umm, it works just fine so long as the system is up and running. You really want the kernel to be printing directly to the console. Otherwise, when the system locks up and the NMI fires, you still won't get your messages over the serial console.
Andy, it looked to me like you had things configured properly. Indeed, I use a very similar setup all of the time. The only difference is it works for me. (I hate that phrase).
I'm not sure what to suggest at this point. If you do an alt-sysrq-h, does that at least print out over the serial console?
-Jeff
HI Jeff, If I do an alt-sysrq-h, I get the one line help on the serial console. If I do alt-sysrq-m to show memory, I see "SysRq : Show Memory" ont the serial console, but nothing more (unless I use Eric's trick). If I go to runlevel 1, alt-sysrq-m has the entire output on the serial console. Later, Andy - -- Andy Stewart, Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCuI64Hl0iXDssISsRAgYoAJwO2tnZkw6ox+URA61Lh16lyUhE4wCeOedC wQJZTh9CV8pUFPfEHkDYjw8= =H2Yg -----END PGP SIGNATURE-----