[lkml]   [2002]   [Sep]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectSummary of kt333a woes, with happy ALi ending
Also FYI: the Soyo Dragon Ultra Platinum m/b never did give me proper
DMA performance on my ATAPI devices. I tried:

stock RH 7.3 kernel

The stock kernel might not have had proper DMA support at all; I
upgraded to 2.4.19 quickly for other reasons. The most obvious problem
with 2.4.19 and 2.4.20-pre5-ac1 was that my IDE DVD-R/RAM/ROM device
did not do DMA, ever, and when forced to attempt DMA the machine eventually
locked, with no error messages that I ever saw. It works fine with
my new Iwill m/b:

[joseph@dhcppc5 ticket]# hdparm -I /dev/hdd


ATAPI CD-ROM, with removable media
Serial Number:
Firmware Revision: A123
DRQ response: 50us.
Packet size: 12 bytes
LBA, IORDY(can be disabled)
DMA: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2 udma0 udma1 *udma2
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=180ns IORDY flow control=120ns

Nor did other ATAPI devices do DMA--I tried a generic CDROM and
an ASUS CDR/RW/ROM. I saw the same behavior when the ATAPI devices
were plugged into the Highpoint controller.

Also HD access seemed slow at times, and there would occasionally be
mysteriously long pauses of a few sec during kernel compiles etc. where
it seemed that some sort of I/O blocking was going on.

I observed similar behavior in Win2k but ... I don't know that I ever
got a proper set of drivers installed. All I know is that with the
IWill m/b (ALi chipset) everything is working OK. I did not get
proper DVD playback on Win2k--it seemed exactly the same slowness
as with Linux.

OTOH my DVDs play fine off the drive from mplayer now, and I can read
and write at appropriate speeds.

I would like to get the kt333a m/b working eventually, because I don't
think my IWill m/b will support the new core Athlons. I suspect that
the board "works" but there must be a BIOS or chipset issue that isn't


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:28    [W:0.022 / U:3.520 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site