Hi Andre,
I tried the patch 2.1.131.ide.update.25.gz that you sent me. It didn't
solve my problem with occasional lockups and VIA VP2/97 with DMA. I
followed your suggestion for enabling CONFIG_IDEDMA_AUTO with the patch.
It had the following effects:
- CD-ROM on /dev/hdc completely broken.
Device is detected, but reads indicate it is 0 bytes long.
Mounting a CD-ROM fails for this reason. Didn't try audio.
- With the patch and CONFIG_IDEDMA_AUTO, lockup without about 30
seconds of disk activity guaranteed. Every time. Can't get
past fsck with this problem. This is much faster than without
the patch, which locked up occasionally but would get past a
5 minute fsck about half the time.
- With the patch but no CONFIG_IDEDMA_AUTO, I can safely enable
DMA with `hdparm -d1 -X34' later. That turns on DMA without lockups.
It works fine, just as without the patch.
- Throughput is about the same. Maybe 0.6% faster.
- Still no UDMA (the chipset claims it can support it; the BIOS
doesn't mention anything; the disk definitely does UDMA).
- I haven't done a BIOS upgrade because I haven't figured out which
new BIOS applies to my particular motherboard! (FIC's site offers
two!). Oh yeah, and the upgrade requires DOS which I might not
have; not sure.
- Whoops! Forgot to get output of /proc/ide/via while I was still
using the patch. Will perhaps send later.
-- Jamie
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