https://bugzilla.novell.com/show_bug.cgi?id=668348 https://bugzilla.novell.com/show_bug.cgi?id=668348#c1 --- Comment #1 from Thomas Renninger 2011-01-31 15:18:32 UTC --- Created an attachment (id=411285) --> (http://bugzilla.novell.com/attachment.cgi?id=411285) serial console log -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=668348 https://bugzilla.novell.com/show_bug.cgi?id=668348#c4 Brandon Philips changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |NEEDINFO InfoProvider| |trenn@novell.com --- Comment #4 from Brandon Philips 2011-01-31 23:10:15 UTC --- Strange. What machine is this happening on? I can't reproduce this on my laptop. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=668348 https://bugzilla.novell.com/show_bug.cgi?id=668348#c6 --- Comment #6 from Thomas Renninger 2011-01-31 23:50:00 UTC --- Best you use sysrq to reboot it, serial console is exported through the service processor which gets switched off as well by the power switch (power switching will be done by service processor as well soon). sysrq works by: ENTER ~~Bb (case sensitive!) -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=668348 https://bugzilla.novell.com/show_bug.cgi?id=668348#c8 Thomas Renninger changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |NEW InfoProvider|trenn@novell.com | --- Comment #8 from Thomas Renninger 2011-02-01 21:36:37 UTC --- You can reboot it as you wish. My first thought was it may be grub, but going up the serial console, it may be the 2.6.38-rc2 kernel you installed hanging that early that it needs early_printk? I try to find out something for half an hour, otherwise I reserved the machine on my user, but for this bug. Go a ahead rebooting..., whatever you need. If you get stuck, I can start a bisect, but I won't be able to do that the next days... -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=668348 https://bugzilla.novell.com/show_bug.cgi?id=668348#c10 --- Comment #10 from Thomas Renninger 2011-02-02 09:09:05 UTC --- I double checked that we did not backport something bad, latest SLE11 SP1 kernel still can do: echo -ne "HELLO 0.0.0\nREGENERATE MOTD krommer.arch.suse.de"

/dev/tcp/music.arch.suse.de/5555 and kdump still works as expected as well.

We might have two problems: Above command triggering a crash which seem to not get logged through serial console (irqs disabled?) and kdump not working which throws the __ioremap when trying to build up the elf header. This echo xy >/dev/tcp/... is a weird feature. I've heard it's bash driven/interpreted and Ubuntu does not have this feature compiled in? Even on SLE11 SP1 above command triggers quite some (unnecessary?) file system activity. Every time I use it I get this logged: EXT2-fs warning: mounting unchecked fs, running e2fsck is recommended REISERFS (device sda5): found reiserfs format "3.6" with standard journal REISERFS (device sda5): using ordered data mode reiserfs: using flush barriers REISERFS (device sda5): journal params: device sda5, size 8192, journal first block 18, max trans len 1024, max batch 900, max commit age 30, max trans age 30 REISERFS (device sda5): checking transaction log (sda5) REISERFS (device sda5): Using r5 hash to sort names EXT4-fs (sda7): mounted filesystem with ordered data mode kjournald starting. Commit interval 15 seconds EXT3 FS on sda8, internal journal EXT3-fs: mounted filesystem with ordered data mode. On 11.4 even more file systems show up. Any chance we could get rid of this broken feature, if Ubuntu does not have it compiled (into bash?) there shouldn't be much important projects using it. If I find the time I try a bit with mainline kernels and try to get things bisected a bit. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.