Messages in this thread | | | Date | Fri, 9 Feb 2001 22:44:00 +0100 | From | Vojtech Pavlik <> | Subject | Re: [RESOLVED]: kernel hangs on CD-R HP8100i if compiled w/ VIA IDE |
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On Fri, Feb 09, 2001 at 10:18:05PM +0100, Henryk Paluch wrote:
> Shortly: kernel (2.2.x, 2.4.x) hangs on CD-R HP8100i, VIA KT133 chipset > (w/ ATA100 support) if kernel is compiled with VIA IDE chipset support. > Please, see my previous post from 21 Jan 2001 for full description. > > After little tweaking via82cxxx.c driver I found, that the cause is > 'Prefetch Buffer: ' (/proc/ide/via) - if disabled for appropriate IDE > channel, everything works well. It also explains, why the kernel works > properly if VIA IDE support is not compiled in - BIOS leaves Prefetch > disabled (I hacked that driver a bit more to show chipset configuration > either before and after modification). > > So I have a little question: What could be a clean way, to make a kernel > option to disable prefetch for VIA (use something like 'ide1=noprefetch'?) > Any idea?
Since version 2.30 of the VIA driver (2.4.2-pre2), the driver leaves prefetch as is set by BIOS. It seems that ATAPI devices need this set to off at least on some of the VIA chips.
-- Vojtech Pavlik SuSE Labs - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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