Messages in this thread | | | Date | Wed, 28 Jul 1999 13:40:52 -0700 | From | merblich <> | Subject | Re: how to determine the cause of kernel lock ups |
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If you don't mind writing hardware dependent code...
To determine whether you have a bad SIMM I would suggest before the OS boots. Try writing a set of bits to the address to each SIMM and then reading them back. Normal sets would be something like: "0000", "0001", .... "1111". This can take anywhere from a few minutes to close to an hour depending on the amount of physical memory in your system.
I hate to say this, but basicly this is what Sun does on all of their systems with the OpenBootProm code in C for hardware verification and Forth before you even see the prompt depending on what is set...
Mitchell Erblich ===================
Hirling Endre wrote: > > On Tue, 13 Jul 1999, Petru Paler wrote: > > > On Mon, Jul 12, 1999 at 01:40:14PM -0400, Jon 'tex' Boone wrote: > > > > > I tried looking through the kernel messages that klogd puts in > > > syslog, but when the machine locks up, nothing is logged. Rebooting > > > is enough to start the system working again, although heavy use will > > > cause it to lock up again. > > > > > > Any thoughts? > > > > I had the same problem and it was caused by a bad DIMM. > > And how do you determine whether your DIMM is bad? I have the above > problem too - except that it only shows in X -, and I've tried running > md5sum-s several times or compiling kernel, but those showed no error. > > How can one determine _if_ the lockup is caused by bad hardware, and > if it is, _which_ piece of hardware is bad? > > (I have an old Trident 9680, a K6-2/300, 128M RAM, an SMC Ultra ISA > and an NE2k PCI Ethernet card, two IDE disks and an IDE cd-rom. Nearly > the same hw worked fine with a 486 dx4-100 w/64M RAM) > > greetings > endre > > -- > ..all in all it's just another rule in the firewall. > > /Ping Flood/ > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.rutgers.edu > Please read the FAQ at http://www.tux.org/lkml/
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
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