[alsa-devel] (no subject)

[Philippe CARRIERE]

Hi,

following is a report of some tests of alsa.1.0.18rc3 in view of support of Tascam US-122L, which might be of interest for you. As a preliminary information, note that I patched my own Fedora kernel and alsa-plugins with Karsten Wiese'patches a few month ago and use regularly Tascam US-122L under Linux which works very fine; I also provide (experimental) packages for Fedora 9 from june 2008 on my web page.

Test 1: succeeded

    - replacement of my own  alsa-plugins-usb_stream-1.0.16-4.us122lv05.fc9 by alsa-plugins-usbstream-1.0.18-1.rc3.fc10 on Fedora 9 (using my own patched kernel 2.6.26 including the snd-usb-us122l module). Everything works.

Test 2: succeeded

    - replacement of previous alsa-1.0.16 by alsa.1.0.18-1.rc3 (Fedora packages; thus alsa-driver-1.0.18rc3 not included). Everything works, including Tascam US-122L when using my patched kernel (which includes the snd-usb-us122l module).

Test 3: failed

    - installation of alsa-driver-1.0.18rc3 (succeeded) on Fedora 9 (as weel, I tested with new Fedora 10 beta which includes kernel 2.6.27.rc3); plug in the US-122L leads to error messages from snd-usb-us122l:

# cat /var/log/messages
...
Oct 11 09:21:51 pollux kernel: usb 2-6: new high speed USB device using ehci_hcd and address 3
Oct 11 09:21:51 pollux kernel: usb 2-6: config 1 interface 1 altsetting 1 bulk endpoint 0x83 has invalid maxpacket 9
Oct 11 09:21:51 pollux kernel: usb 2-6: configuration #1 chosen from 1 choice
Oct 11 09:21:51 pollux kernel: usb 2-6: New USB device found, idVendor=0644, idProduct=800e
Oct 11 09:21:51 pollux kernel: usb 2-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Oct 11 09:21:51 pollux kernel: usb 2-6: Product: US-122L
Oct 11 09:21:51 pollux kernel: usb 2-6: Manufacturer: TASCAM
Oct 11 09:21:51 pollux kernel: usb 2-6: SerialNumber: no serial number
Oct 11 09:21:51 pollux kernel: ALSA /home/Test/alsa-driver-1.0.18rc3/usb/usx2y/../../alsa-kernel/usb/usx2y/usb_stream.c:618: 0
Oct 11 09:21:55 pollux kernel: ALSA /home/Test/alsa-driver-1.0.18rc3/usb/usx2y/../../alsa-kernel/usb/usx2y/us122l.c:329: us122l_start error -14 
Oct 11 09:21:55 pollux kernel: snd-usb-us122l: probe of 2-6:1.1 failed with error -5

Oct 11 09:21:55 pollux kernel: usbcore: registered new interface driver snd-usb-us122l

and

# cat /proc/asound/cards
0 [Intel          ]: HDA-Intel - HDA Intel
                      HDA Intel at 0xfebfc000 irq 21

US-122L finally not being recognized.

Test 4: succeded

    - same than test 3 for Fedora 9, but using a patched ehci-hcd module (the patch adding some features from the original one by Karsten Wiese not - yet ? - included in kernel 2.6.26). Everything works including of course the US-122L.

Question:

Thus, a patched ehci-hcd module is required. Is the patch scheduled to appear in kernel 2.6.27 or would it be useful to  work for providing a kind of kmod ?

Regards

Phil.
-- 
Philippe Carriere <philippe-f.carriere at wanadoo.fr>