From: Matt Mackall <mpm@selenic.com>
To: Pat LaVarre <p.lavarre@ieee.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: console lost to Ctrl+Alt+F$n in 2.6.0-test5
Date: Fri, 12 Sep 2003 20:57:47 -0500 [thread overview]
Message-ID: <20030913015747.GC4489@waste.org> (raw)
In-Reply-To: <1063414148.2892.26.camel@patehci2>
On Fri, Sep 12, 2003 at 06:49:08PM -0600, Pat LaVarre wrote:
>
> > I'm working on this, it's rather messy. Your lockup might be caused by
> > printk spew during console switch, see if it still locks up with the
> > sleep debugging turned off.
>
> Yes, thank you, Ctrl+Alt+F$n now works if only I
> CONFIG_DEBUG_SPINLOCK_SLEEP=n.
>
> Also `sudo cat /proc/kmsg | tee ...` also suddenly starts working.
>
> I wonder if somehow /proc/kmsg now working is a clue? Back with =y, my
> `dmesg` was clean but via /proc/kmsg I was seeing garbage like
>
> mmae t itbl
>
> or:
>
> mmae t itle
What video are you using? I'm guessing you've got a framebuffer console?
VESA by any chance?
> for what now again is such reassuring chatter as:
>
> <6>scsi2 : SCSI emulation for USB Mass Storage devices
> <5> Vendor: Iomega Model: RRD Rev: 23.D
> <5> Type: CD-ROM ANSI SCSI revision: 02
> <7>WARNING: USB Mass Storage data integrity not assured
> <7>USB Mass Storage device found at 3
> <4>sr1: scsi3-mmc drive: 125x/125x caddy
> <4>sr1: scsi3-mmc maybe not writeable
> <4>sr1: scsi3-mmc writable profile: 0x0002
> <7>Attached scsi CD-ROM sr1 at scsi2, channel 0, id 0, lun 0
>
> Pat LaVarre
>
> P.S. I could easily check to see if =y kills an ssh session or just the
> display, if that helps.
That might help track down a bug in the console, sure. Not sure what's
going on with /proc/kmsg though.
> P.P.S.
>
> Tentatively I conclude "sleep debugging ... off" meant this .config
> change because I see:
Yep, that's the one.
--
Matt Mackall : http://www.selenic.com : of or relating to the moon
next prev parent reply other threads:[~2003-09-13 1:57 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-12 14:57 oops if unplug dd of=/dev/scd$n Pat LaVarre
2003-09-12 18:19 ` console lost to Ctrl+Alt+F$n in 2.6.0-test5 Pat LaVarre
2003-09-12 23:06 ` Matt Mackall
2003-09-13 0:49 ` Pat LaVarre
2003-09-13 1:57 ` Matt Mackall [this message]
2003-09-13 13:38 ` Pat LaVarre
2003-09-13 14:49 ` Michael Frank
2003-09-13 15:47 ` Michael Frank
2003-09-13 23:12 ` Pat LaVarre
2003-09-14 9:32 ` console lost to Ctrl+Alt+F_n " Pavel Machek
2003-09-14 0:24 ` 2.6.0-test5: intermittent crash on chvt to X; was console lost to Ctrl+Alt+F$n " Michael Frank
2003-09-14 23:04 ` Pat LaVarre
2003-09-12 19:44 ` oops if unplug dd of=/dev/scd$n Pat LaVarre
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