Re: [iPAQ] Ipaq Pcmcia 2fast4you ?

My PCMCIA is also flaky and does not initialize properly most of the
time unless I scale down the speed first. No problems like this with the
compaq distributions up to .19, but when I switched to familiar I
started having these problems. So I don't think this is just an isolated
problem, although it doesn't seem to affect most people's units.

-Holly Gates

tytso@thunk.org wrote:

> On Tue, Apr 17, 2001 at 09:08:55AM +0200, Gerd Prillwitz wrote:
>
>> I have a Pcmcia jacket now for a while and I have made the experience that
>> in standard mode a lot of cards will only be detected by accident.
>> My experience is that the Pcmcia IF is maybe too fast for most of the cards.
>> (System bus on most notebooks is < 100Mhz!) we have 206 Mhz.
>> I need to scale the Cpu down to less than 100Mhz to detect most of the
>> cards.
>> So most of the time it works to "echo 7 > /proc/scale" or use the menu from
>> familar v04. There is a way to configure the Pcmcia speed through an option
>> in /etc/sysconfig/pcmcia but familiar does not have this file !
>
>
> Hey, thanks!!
>
> This solved my PCMCIA problems that I had reported earlier.
>
> Specifically, the Linksys card which hung the system until I ejected
> it now works with after I do "echo 7 > /proc/scale", and the problem
> reappears if I reset /proc/scale with "echo 10 > /proc/scale".
>
> Similarly, the WaveLan cards which failed to work before now work
> only if I've run the command "echo 7 > /proc/scale".
>
> So was this a bit of lore that everyone else knew? Was I just
> unlucky? Also, does this work by actually slowing down the CPU? If
> so, it seems kinda a lose that I'm going to have to slow down the
> (already not-terribly-blazing-fast) ARM processor just to keep the
> PCMCIA card happy.
>
> Also, I tried looking in the stock Linux 2.4.3 kernel sources and
> couldn't find where /proc/scale is getting set up. I assume this is
> an arm/iPAQ kernel special?
>
> - Ted
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Received on Thu Apr 19 11:24:06 2001