[K12OSN] More feedback on Fedora 10 + LTSP

"Terrell Prudé Jr." microman at cmosnetworks.com
Wed Apr 22 17:30:59 UTC 2009

Terrell Prudé Jr. wrote:
> David Hopkins wrote:
>> On Tue, Apr 21, 2009 at 5:50 PM, "Terrell Prudé Jr."
>> <microman at cmosnetworks.com> wrote:
>>> I know you're at your wits' end here, and so is that teacher.  This is not
>>> good.
>>> Remind us what sound card is in these thin clients, would you?
>>> --TP
>> Actually, the systems are Dell GX150's with either 256Mb or 512Mb of
>> memory..  http://support.dell.com/support/edocs/systems/opgx150/en/ug/specs.htm#audio
>> Though, does that mean I might have the i810 video issue?  For
>> whatever reason, I thought the card was detected as an ati.  I have to
>> check this.
> That sound card (looks like it's built-in) says it has SoundBlaster 
> emulation, so when you were running it w/ K12LTSP 5EL, did you by 
> chance try turning on "SOUND=Y" in /opt/ltsp/i386/etc/lts.conf, and 
> also the setting from here?
>   http://www.k12ltsp.org/mediawiki/index.php/Technical:Sound
> Something along these lines....
>   SMODULE_01 = "sb io=0x220 irq=5 dma=1"
> That sort of thing always worked for me with cards that supported SB 
> emulation, including (especially!) the SoundBlaster 16 and the 
> SoundBlaster AWE32/64 cards themselves.
> --TP

Just did some more Googling.  Looks like the "sb" driver won't work, so 
try changing the "sb" in that SMODULE_01 line to "i810_audio".

If that doesn't work (let's hope that it does!), then here's why.  You 
know about "Winmodems" and "Winprinters"?  Well, it appears that the 
AD1885 sound chip is a "WinSound" chip that implements its brains in 
software like a Winmodem does.  I don't know if that's been remedied in 
recent times, i. e. there's now support in Linux 2.6.  Given that 
K12Linux's Fedora 10 kernel set supports these chips, the answer is 
"probably", but the RHEL/CentOS kernel is, remember, tried-and-tested 
v2.6.18.  Here's a link explaining the situation with that chip.


One possible option would be to copy the newer LTSP kernel tree (it's in 
/tftpboot) from a K12Linux box over to a K12LTSP 5EL box and adjust your 
DHCP server's settings accordingly.  It's not too hard if you watch your 

That said, if you want sound to "Just Work," I'd seriously look into 
getting some Ensoniq AudioPCI cards, since these Dell GX150's appear to 
have only PCI slots (otherwise I'd suggest SoundBlaster 16 or AWE's).  
Creative bought Ensoniq a while back and marketed a slightly updated 
version as "Creative Ensoniq AudioPCI".  All such cards work GREAT and 
should be pretty doggone cheap to pick up.  They're what I use, with 
both K12LTSP 4.2EL and 5EL, and I love 'em.

Here's a Google-search "shopping results" link.  Note that it's a long 
link and may word-wrap.  My search terms were as follows.

  "creative ensoniq" audiopci


Also check eBay.  They're pretty cheap there as well.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/k12osn/attachments/20090422/45cda3ac/attachment.htm>

More information about the K12OSN mailing list