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SubjectRe: very strange (semi-)lockups in 2.4.5
Date
Pozsar Balazs writes:

> I'm having ~2 lockups a day. The following happens:
> If I was under X, i only can use the magic-key, but no other keyboard (eg
> numlock) or mouse response, the screen freezes, processes stop.
> If i was using textmode:
> numlock still works
> cursor blinks
> processess stop (eg, gpm doesn't work, outputs freeze)
> i can still switch vt's.
> BUT, i can only type into a few vt's, last time into 3,5,6,7,8, but not
> into 1,2 or 4!
>
> I cannot give you any traces, as i dont have any.
>
> Also note that magic-key works, and it says that it umounts filesystems if
> i press magic-u, but next time at mount i see that reiserfs is replaying
> transactions.
>
>
> Any ideas?
>
> The machine is a P3-750, 512M ram, abit vp6 mb. No overclocking, and it
> passes memtest86.

I think I'm getting the same thing, but I don't have the magic-key
compiled in. I'm going to hook up a VT510 to the serial port, in case
this is just XFree86 crashing. For anyone collecting statistics:

kernels 2.4.4-pre6 (?) and now 2.4.6-pre3
plain Pentium MMX @ 200 MHz
Intel motherboard -- see below
stable since 1996, on a UPS, dust-free, and the fan works
one lockup per day with desktop usage

In case the serial console doesn't work, could someone post plans
for a safe NMI board? (both ISA and PCI) The best I found:
http://www.sandelman.ottawa.on.ca/linux-ipsec/html/2000/02/msg00425.html
http://www.sandelman.ottawa.on.ca/linux-ipsec/html/2000/02/msg00391.html
(for PCI you're supposed to assert SERR# on the clock -- how?)

00:00.0 Host bridge: Intel Corporation 430TX - 82439TX MTXC (rev 01)
00:07.0 ISA bridge: Intel Corporation 82371AB PIIX4 ISA (rev 01)
00:07.1 IDE interface: Intel Corporation 82371AB PIIX4 IDE (rev 01)
00:07.2 USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 01)
00:07.3 Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev 01)
00:11.0 Ethernet controller: Digital Equipment Corporation DECchip 21040 [Tulip] (rev 23)
00:13.0 Ethernet controller: Lite-On Communications Inc LNE100TX Fast Ethernet Adapter (rev 25)
00:14.0 VGA compatible controller: ATI Technologies Inc 3D Rage Pro 215GP (rev 5c)
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