Re: Re: i686 hang on boot in userspace

From: gmu 2k6
Date: Wed Jul 19 2006 - 06:24:28 EST

On 7/18/06, gmu 2k6 <gmu2006@xxxxxxxxx> wrote:
On 7/17/06, gmu 2k6 <gmu2006@xxxxxxxxx> wrote:
> On 7/17/06, Roman Zippel <zippel@xxxxxxxxxxxxxx> wrote:
> > Hi,
> >
> > On Mon, 17 Jul 2006, gmu 2k6 wrote:
> >
> > > either I'm too dumb or there is an undocumented way to enable SysRq on
> > > bootup or the machine is really hanging hard. I'm not able use
> > > Alt+Print as nothing happens besides console showing the typed in
> > > characters ^[t.
> >
> > It might be a keyboard problem, try releasing Print, but keeping Alt
> > pressed and then try another key.
> maybe the problem is HP's Integrated Lights Out Java Applet. I will
> try tomorrow morning in the server room.

yep that Java Applet was the problem. it worked when I was physically
connected by keyboard. I got the following by pressing Alt+SysRq+p but
I'm not sure it helps as being in cpu_idle looks normal to me:
Pid: 0, comm: swapper
EIP: 0060 [<c0101a57>] CPU: 0
EIP: isat mwait_idle+0x2a/0x34
EAX: 00000000 EBX: c0414008 ECX: 00000000 EDX: 00000000
ESI: c0414000 EDI: c33984e4 EPP: 00004864 DS: 007b ES: 007b
CR0: 8005003b CR2: b7f818cc CR3: 375e73c0 CR4: 000006f0
[<c0101a175>] cpu_idle+0x63/0x79
[<c041a6cf>] start_kernel+0x262/0x393
[<c041a1c3>] unknown_bootoption+0x0/0x25a

Alt+SysRq+s seems to sync and write the logs to kern.log/messages but
the logs vanish after reboot. Therefore for the time being I had to
write it down by hand but I'm sure there's an elegant way like saving
the logfiles before booting up again via a second system or livecd.
Maybe there's a better way than that?

same boot problem with 2.6.18-rc1-mm2 btw, did not SysRq for that though.
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