[alsa-devel] Wyse Winterm CS5535 Driver

Darryl Bond dbond at nrggos.com.au
Wed Oct 31 02:08:06 CET 2007

I have a Wyse S50 terminal that I am booting diskless. I have been 
trying to get sound working. The box has a cs5535 chipset.

After much fiddling in the kernel source ( <> ) I 
have been able to make it work. I'm not sure if it is a cs5535 problem 
as the code that fixes it is in ac97_pcm.c.

It would appear that the card is getting passed an unexpected rate. The 
function sound/pci/ac97/ac97_pcm.c snd_ac97_set_rate()
has a section:
if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRA) == 0)      /* VRA */
                        if (rate != 48000 && rate != 96000)
                                 return -EINVAL;
If I use 'aplay wavfile' the rate passed to this function is 44100.
I I changethe code to:
if (rate != 48000 && rate != 96000 && rate != 44100)

it plays but at a slightly incorrect rate.

If I use the Citrix ICA client (which is what I really want to work) the 
rate passed in is 8000. If I add 8000 to the test, it works, but is far 
too fast.

Any hints as to what I should try?

Darryl Bond

The contents of this electronic message and any attachments are intended only
for the addressee and may contain legally privileged, personal, sensitive or
confidential information. If you are not the intended addressee, and have
received this email, any transmission, distribution, downloading, printing or
photocopying of the contents of this message or attachments is strictly
prohibited. Any legal privilege or confidentiality attached to this message and
attachments is not waived, lost or destroyed by reason of delivery to any
person other than intended addressee. If you have received this message and
are not the intended addressee you should notify the sender by return email and
destroy all copies of the message and any attachments.  Unless expressly
attributed, the views expressed in this email do not necessarily represent the
views of the company.

More information about the Alsa-devel mailing list