Olaf Meeuwissen <[EMAIL PROTECTED]> writes:
Yup, following up on my own post! Please bear along with the long
quotes. I left them in because I'm now also cross-posting this to
debian-laptop.
> "Karsten M. Self" <[EMAIL PROTECTED]> writes:
>
> > on Fri, Jun 15, 2001 at 04:51:35PM +0900, Olaf Meeuwissen ([EMAIL PROTECTED])
>wrote:
> > > Dear all,
> > >
> > > I'm running mostly testing with some unstable under linux 2.2.19 (hand
> > > rolled, of course) on an IBM ThinkPad i1476 (Type 2611). Since a few
> > > weeks, my machine completely locks up at unpredictable moments. The
> > > screen is no longer updated, I can't switch to a virtual terminal,
> > > even the three finger salute doesn't do a thing. Pinging from another
> > > machine results in 100% lost packets but the PCMCIA network card keeps
> > > signalling traffic. Just about the only thing that keeps on going is
> > > CD audio.
> >
> > CD audio is not mediated by the OS, [...]
>
> > > I regularly 'apt-get -t testing upgrade' and the problem hasn't gone
> > > away. I've tried other kernels, including the Debian vanilla ones,
> > > but to no avail. I've run memtest86 and found errors in one of my
> > > DIMMs but the problem remains even after lobotomy. That is, even when
> > > I only use the DIMM that is okay (memtest86, 20+ passes, tests 1-7) my
> > > machine randomly locks up.
> > >
> > > I've checked the logs but apart from occasional blocks of nulls just
> > > before a lock up, I haven't seen anything out of the ordinary. Note,
> > > those null blocks only appear before _some_ lock ups, not all.
> >
> > Look for power-change events under apmd.
>
> I doubt that has anything to do with it because the machine is on AC
> 99% of the time. [Goes checking the logs now ...] No correlation
> between power change events and crash times.
Okay, so I compiled a kernel without any APM support, installed and
tried it. My system froze within half an hour :-(
> > > Because I haven't experienced any lock up when using the console, I'm
> > > wondering if my graphics card (probed as Neomagic NM2200 according to
> > > XFree86 log, NeoMagic MagicMedia 256AV according to hardware spec) has
> > > gone bad. Are there any tools a la memtest to test my graphics card?
> >
> > Possible, but the card's pretty well supported in recent XF86 v.3 and
> > v.4 drivers.
> >
> > It's not clear how long you're leaving your system in console mode to
> > establish whether or not this is a problem. Might make a practice of
> > doing this on long breaks (lunch, overnight), and seeing what the
> > results are.
>
> Sorry, should have mentioned that; somewhere around 5, 6 hours. Have
> only done that once though. Could try leaving it in console mode
> overnight.
Left if sitting at the console and gdm login prompts overnight as
well. No crash. Bad news is that as soon as I logged in through
gdm, my machine froze. Actually, it locked up three times in ten
minutes or so :-(
> > > Before you suggest, I have already tried both Gnome (with several
> > > window managers) and KDE. It doesn't matter. The machine even locks
> > > up when running (x|k)screensaver during lunch :-(
> > >
> > > If you have other ideas as to what could be the matter, I'm open to
> > > suggestions.
> >
> > I had similar problems associated with apmd and Speedstep (aka
> > Geyserville) on my TuxTops Amethyst 20U, exacerbated by a flaky onboard
> > power port (it breaks circuit when jiggled, resulting in APM mode
> > changes). In system BIOS, I disabled speedstep functionality -- my CPU
> > is always running in full-speed mode (600 MHz), resulting in shorter
> > battery life, but longer uptime ;-). I've had no problems since
> > changing this setting about two months ago.
>
> I believe I've disabled BIOS power savings settings but will double
> check at the next crash, er, reboot.
Disabled all power management settings (there's not much to be set
with this BIOS) to no avail.
> > I'd made a more complete report to debian-laptop, should be in
> > archives.
>
> That box gave you a bit of troubles, eh? My symptoms seem very much
> like yours. I'll be going over my kernel APM configuration as well.
See above, that wasn't much use.
> > You might isolate video card issues by running in console mode, by
> > switching to a version 3 XF86 driver, or by switching from an
> > accelerated driver to SVGA or VGA16.
>
> I've been thinking about running X on the frame buffer device myself.
This morning, after three lock ups in ten minutes, I compiled frame
buffer support in, fiddled my XF86Config-4 to use it and I've been up
for 5(!) hours. I think I'll lock my session with xscreensaver (to
guarantee some Xserver activity (eh, at least until APM kicks in and
blanks the screen)) before I go home and if my machine hasn't crashed
by tomorrow morning I'm ready to believe my problem is fixed. I might
even get bold and start using that broken DIMM again ;-)
Problem then is where to put the blame: graphics card or X driver?
I'm using xserver-xfree86 4.0.3-4.
--
Olaf Meeuwissen Epson Kowa Corporation, Research and Development
Free Software: `No walls, no windows! No fences, no gates!'
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