[syslinux] PXELINUX and memtest86p weirdness

H. Peter Anvin hpa at zytor.com
Tue Feb 8 00:29:47 PST 2011

On 02/07/2011 11:18 PM, Marius Eikenes wrote:
> Hi,
> I'm having a strange problem with Memtest86+ (4.10 and 4.20 tried) from
> PXELINUX on a specific type of motherboard.
> When running memtest86+ 4.10 from the newest "Ultimate Boot CD"
> (isolinux i reckon?) the memtest runs without errors for several passes.
> But when loaded from PXELINUX it shows several hundred memory errors in
> just a few minutes.
> I double checked by copying the memtest-binary from the CD to the
> tftproot, but when started from PXE errors still occurred.
> My next try was updating pxelinux to 4.03, but this showed no change.
> Then the next try was 4.04-pre7, still the same.
> The motherboards are all Asus M4A89GTD/PRO USB3.
> and this is consistent on 5 different machines with the exact same
> hardware and BIOS-versions.
> Anyone got a clue? I don't even know where to start looking.

Sounds like the PXE BIOS is broken and scribbling on memory it doesn't own.


H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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