Messages in this thread | | | Date | Fri, 15 Nov 2002 12:26:10 -0500 (EST) | From | Ken Witherow <> | Subject | Re: Dual athlon XP 1800 problems |
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> 1. When I first put it together, it would consistenly run OK for a > period of 4-5 minutes, quite precisely - no less than 4, no more than 5 > and then just lock up HARD - no Ctrl-Alt-Del, no kernel panics, nothing. > Once or twice it seemed like it stuttered - as if the load was like > 10.00 or higher, the keystroke echo would take 2-3 seconds. > > 2. First try - I pulled the Tekram (it's ancient and has bootable BIOS) > - no difference > > 3. Tried some BIOS settings (e.g. SMP 1.1 mode) - it DOES NOT like this; > any BIOS changes AT ALL (even seemingly harmless ones like Num Lock) > appear to mess it up totally, and LILO hangs at "LI" when trying to > start. Restored factory defaults.
I have a S2460 with dual 1800MPs using BIOS rev 1.04. I had very similar problems (random hangs, sometimes after 2 minutes, sometimes after 36 hours). Here's what I did to solve them:
1) Turn off power management in the BIOS. I still have power management enabled in linux and all is fine.
2) (this is the most important one) Make sure you have a minimum of a 500 watt power supply. Each CPU alone is rated for 66 watts of consumption.
3) I still get random hangs at boot (usually after rebooting linux) and I believe this is due to some ACPI problem. A hard reboot (turn the power supply off and on) fixes it for me.
4) There are a couple bugs with the 760MP chipset and APICs. To see if they're affecting you, add "mem=nopentium noapic" to your kernel parameters (I can run fine without them).
> 4. Then I noticed that the CPU1 heatsink was quite warm (maybe 70C > feeling around the thick bit of the aluminium) whereas CPU0 heatsink is > just above room temp. > > 5. Checking the Winbond monitoring in the BIOS** menu, it comes up > showing both CPU's at 77C, then as you hit keys it takes proper > readings, and claims both CPUs within 1-2 degrees of each other (??). It > seems accurate on fan speeds though. Both fans running pretty fast, > 5500-6200 RPM.
My BIOS reports the right temps but lm_sensors didn't. I too was getting temps in the 75C+ range. To fix lm_sensors, do the following:
echo "2" > /proc/sys/dev/sensors/w83782d-i2c-0-2d/sensor1 echo "2" > /proc/sys/dev/sensors/w83782d-i2c-0-2d/sensor2 echo "2" > /proc/sys/dev/sensors/w83782d-i2c-0-2d/sensor3
> 7. Brought it up to single user mode console, to see if it was video > card etc. - did some testing of just letting it mostly idle (while true > - uptime - sleep 1 - etc.) and locked up 1-2 more times.
I thought it was my video card too... so I went out and spent $90 on a new one only to find it does the same thing.
> 8. Rebooted again, now it's up and running and appears stable (still 1 > CPU), so I took it up to full init 5 and it stayed up (and so I'm > writing this email :-) Once or twice seemed to stall again for 1-2 > seconds (interrupt storm ???) but recovered.
I notice this sometimes too... I chalk it up to some SMP locking somewhere. Currently up 6 days, 3:53 with the maximum around 40 days (rebooted to upgrade kernel).
> Other observation, possibly unrelated: the unpacking of the kernel seems > very slow for an otherwise pretty quick machine - the dots when it says > "Loading xxx..." tick at about 1 per second, much like a laptop with > PC-66 memory, compared with 4-5 per second for the Pentium III > 800/PC-133 motherboard I just hauled out.
When mine hasn't reset right (the aforementioned ACPI lockup), mine does this. It was especially prevalent before I upgraded my power supply from 400 to 550 watts
> ** The temperature sensor driver stuff didn't seem to come with the > kernel ??
pick up the lm_sensors package
-- Ken Witherow <phantoml AT rochester.rr.com> ICQ: 21840670 AIM: phantomlordken http://www.krwtech.com/ken
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