16 Aug
2005
16 Aug
'05
10:35 a.m.
Hi all,
I'm trying to get an Echo Indigo IO working under Gentoo 2.6.12 kernel.
The card's recognized correctly by ALSA and I can play through it but
all output is badly distorted.
I had the same problem on this laptop under Windows and fixed it using a
utility from Echo to disable prefetch for the cardbus chipset (ENE
CB1410). Does anyone know how to disable prefetch under Linux? I've
had a go at hacking the cardbus driver source but I've not got the right
result yet.
If there are any other good places I could ask about this that'd be
useful as well.
Cheers,
Jon Stutters
www.jeremah.co.uk
16 Aug
16 Aug
10:50 a.m.
On Tue, 2005-08-16 at 13:34 +0100, Jon Stutters wrote:
Hi all,
I'm trying to get an Echo Indigo IO working under Gentoo 2.6.12 kernel.
The card's recognized correctly by ALSA and I can play through it but
all output is badly distorted.
I had the same problem on this laptop under Windows and fixed it using a
utility from Echo to disable prefetch for the cardbus chipset (ENE
CB1410). Does anyone know how to disable prefetch under Linux? I've
had a go at hacking the cardbus driver source but I've not got the right
result yet.
i would have thought that this was susceptible to the same kind of
solution that Ico used to solve a similar problem with the RME HDSP
pcmcia card. rather than hack the driver, use setpci and its cousins to
investigate and modify the state of the PCI device registers. you will
need to find out how to get the state in windows before and after that
utility runs, and then take the information on what it changed and apply
it to setpci.
--p
12:15 p.m.
Paul Davis wrote:
On Tue, 2005-08-16 at 13:34 +0100, Jon Stutters
wrote:
You're a lifesaver Paul thanks very much.
For the record:
To disable prefetch on the ENE CB1410 and fix playback with the Echo
Indigo IO change C8h to 0200h. For example:
setpci -s 02:04.0 c8.W=2,0
(where 02:04.0 is the cardbus controller address)
Cheers,
Jon Stutters
Hi all,
I'm trying to get an Echo Indigo IO working under Gentoo 2.6.12 kernel.
The card's recognized correctly by ALSA and I can play through it but
all output is badly distorted.
I had the same problem on this laptop under Windows and fixed it using a
utility from Echo to disable prefetch for the cardbus chipset (ENE
CB1410). Does anyone know how to disable prefetch under Linux? I've
had a go at hacking the cardbus driver source but I've not got the right
result yet.
i would have thought that this was susceptible to the same kind of
solution that Ico used to solve a similar problem with the RME HDSP
pcmcia card. rather than hack the driver, use setpci and its cousins to
investigate and modify the state of the PCI device registers. you will
need to find out how to get the state in windows before and after that
utility runs, and then take the information on what it changed and apply
it to setpci. 
7:55 p.m.
You're a lifesaver Paul thanks very much.
For the record:
To disable prefetch on the ENE CB1410 and fix playback with the Echo
Indigo IO change C8h to 0200h. For example:
setpci -s 02:04.0 c8.W=2,0
(where 02:04.0 is the cardbus controller address)
please send a detailed
description to Daniel Ritz <daniel.ritz(a)gmx.ch>ch>.
he helped ico and me with our hdsp problems and submitted a kernel patch
for the o2 and ene cardbus bridges ...
cheers ... tim
--
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3 comments
3 participants
participants (3)
-
Jon Stutters -
Paul Davis -
Tim Blechmann