Messages in this thread | | | Date | Wed, 04 Sep 2002 09:05:05 +0200 | From | Jens Wiesecke <> | Subject | Re: P4 with i845E not booting with 2.4.19 / 3.5.31 |
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Justin Heesemann wrote: >>I tested: >>2.4.19-pre6 -> boots with mem=512M parameter >>2.4.19-pre7 -> didn't boot at all >>2.4.19-pre7 with arch/i386/kernel/setup.c from 2.4.19-pre6 -> boots with >>mem=512M parameter > > > I have another update: > some might know the memtest86 utility. > > it has three ways of detecting the memory size "BIOS - Std", "BIOS - All" and > "Probe" > > on my Athlon Mainboard (which has no Problems with 2.4.19 or later kernels) > all methods show the same (or nearly same) ammount of memory. > > on my Epox 4G4A+ i845g Mainboard, which has all the Problems Jens Wiesecke > has, it's different: > BIOS - Std : 640k (!!) > BIOS - All : 4091M (!!!!) > Probe: 511M (which seems correct as I have 512 MB Ram and 1 MB is shared > graphics ram)
ok. I tested my Chaintech 9EJL i845E mainboard the same way and I have exactly the same output with memtest86
BIOS - Std : 640k BIOS - All : 4091M (memtest stops working afterwards) Probe: 512M (since I have no shared graphics ram)
so the problem seems to be BIOS related. But what I don't understand is that since I tell the kernel to use 512 MByte of RAM (mem=512M) and kernels up to 2.4.19pre6 can handle this:
What changed and is there a workaround for kernels newer than 2.4.19pre6 (for example telling the kernel not to rely on the memory information of the BIOS e820 procedure) ?
I tried to compile 2.4.20pre5-(ac) with the arch/i386/kernel/setup.c from 2.4.19pre6 but that didn't work.
Best regards -- Jens Wiesecke Institute for Macromolecular Chemistry Darmstadt - Germany e-mail: j_wiese@hrzpub.tu-darmstadt.de
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