Re: IBM Thinkpad G41 PCMCIA problems

From: David Härdeman
Date: Sun Feb 20 2005 - 04:54:19 EST


On Sun, Feb 20, 2005 at 09:26:59AM +0000, Russell King wrote:
On Sun, Feb 20, 2005 at 10:22:09AM +0100, David Härdeman wrote:
I see the same problem with an IBM Thinkpad G40, and only when there is 1Gb of memory or more in the machine.

Check to see if your e820 map has a hole in it, and whether any of
your Cardbus bridge memory / region 0 resources appear in it.

If your e820 map contains a hole, I'd suspect another buggy bios.

e820 map:
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 000000000009f000 (usable)
BIOS-e820: 000000000009f000 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000ce000 - 00000000000d0000 (reserved)
BIOS-e820: 00000000000dc000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 000000000f6f0000 (usable)
BIOS-e820: 000000000f6f0000 - 000000000f700000 (reserved)
BIOS-e820: 000000000f700000 - 000000003f6f0000 (usable)
BIOS-e820: 000000003f6f0000 - 000000003f6f8000 (ACPI data)
BIOS-e820: 000000003f6f8000 - 000000003f6fa000 (ACPI NVS)
BIOS-e820: 000000003f700000 - 0000000040000000 (reserved)
BIOS-e820: 00000000ff800000 - 0000000100000000 (reserved)
118MB HIGHMEM available.
896MB LOWMEM available.

Is the hole between 0x36f6fa000 and 0x3f700000?

And what would be the proper way of fixing it (assuming that IBM won't issue a fixed BIOS)?

Re,
David
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