hvr950q stopped working: read of drv0 never returns

Hi,

I have an HVR 950Q on my Ubuntu 2.6.32 kernel. I have in fact tried several kernel versions on a couple of different machines with the same behaviour.

What seems to be happening is that /dev/dvb/adapter0/dvr0 can be opened:

open("/dev/dvb/adapter0/dvr0", O_RDONLY|O_LARGEFILE) = 0

but a read from it never seems to return any data:

read(0,
[ process blocks waiting ]

Nothing abnormal in dmesg:

[916870.612154] usb 1-2: new high speed USB device using ehci_hcd and address 27
[916870.772818] usb 1-2: configuration #1 chosen from 1 choice
[916876.064150] au0828 driver loaded
[916876.424163] au0828: i2c bus registered
[916876.747481] tveeprom 4-0050: Hauppauge model 72001, rev B3F0, serial# 6922999
[916876.747487] tveeprom 4-0050: MAC address is 00-0D-FE-69-A2-F7
[916876.747490] tveeprom 4-0050: tuner model is Xceive XC5000 (idx 150, type 76)
[916876.747494] tveeprom 4-0050: TV standards NTSC(M) ATSC/DVB Digital (eeprom 0x88)
[916876.747497] tveeprom 4-0050: audio processor is AU8522 (idx 44)
[916876.747500] tveeprom 4-0050: decoder processor is AU8522 (idx 42)
[916876.747503] tveeprom 4-0050: has no radio, has IR receiver, has no IR transmitter
[916876.747506] hauppauge_eeprom: hauppauge eeprom: model=72001
[916876.798021] au8522 4-0047: creating new instance
[916876.798025] au8522_decoder creating new instance...
[916877.127635] tuner 4-0061: chip found @ 0xc2 (au0828)
[916877.282505] xc5000 4-0061: creating new instance
[916877.287331] xc5000: Successfully identified at address 0x61
[916877.287336] xc5000: Firmware has not been loaded previously
[916877.287791] au8522 4-0047: attaching existing instance
[916877.296083] xc5000 4-0061: attaching existing instance
[916877.300826] xc5000: Successfully identified at address 0x61
[916877.300830] xc5000: Firmware has not been loaded previously
[916877.300835] DVB: registering new adapter (au0828)
[916877.300840] DVB: registering adapter 0 frontend 0 (Auvitek AU8522 QAM/8VSB Frontend)...
[916877.301421] Registered device AU0828 [Hauppauge HVR950Q]
[916877.302825] usbcore: registered new interface driver au0828
[916925.988585] xc5000: waiting for firmware upload (dvb-fe-xc5000-1.6.114.fw)...
[916925.988595] usb 1-2: firmware: requesting dvb-fe-xc5000-1.6.114.fw
[916926.076234] xc5000: firmware read 12401 bytes.
[916926.076238] xc5000: firmware uploading...
[916934.265042] xc5000: firmware upload complete...
[916934.972117] xc5000: waiting for firmware upload (dvb-fe-xc5000-1.6.114.fw)...
[916934.972128] usb 1-2: firmware: requesting dvb-fe-xc5000-1.6.114.fw
[916934.994581] xc5000: firmware read 12401 bytes.
[916934.994586] xc5000: firmware uploading...
[916943.981063] xc5000: firmware upload complete...
[917101.354372] xc5000: waiting for firmware upload (dvb-fe-xc5000-1.6.114.fw)...
[917101.354388] usb 1-2: firmware: requesting dvb-fe-xc5000-1.6.114.fw
[917101.394161] xc5000: firmware read 12401 bytes.
[917101.394165] xc5000: firmware uploading...
[917110.813119] xc5000: firmware upload complete...

This device was working just fine until I rebooted the machine it's usually connected to earlier today. Now I can't seem to get it working anywhere.

I'm at a loss where to go from here in debugging. Any hints?

Thanx,
b.

Hi Brian,

What command are you using to control the frontend? If it's "azap", did you remember to specify the "-r" argument?

Devin

Devin J. Heitmueller - Kernel Labs
http://www.kernellabs.com

Hi Devin,

Uh-oh. Here comes a grand display of my ignorance for the manual workings of this device. :-/

Primarily I use this device with Mythtv but have been forced into trying to debug this as it's not working in Myth. I thought that using this device was as simple as one of the PVR-{50,{1.2}5}0 devices and I could just "cat < /dev/dvb/adapter0/dvr0 > file.mpg".

Your reference to azap gave me something to research. Subsequently I have done the following:

$ brian@pc:~$ w_scan -c US -x -A2 > /tmp/initial-tuning-data.txt
$ mkdir ~/.azap
$ scan -A2 initial-tuning-data.txt > ~/.azap/channels.conf

But now I can't get azap to do anything useful:

$ azap -r 291
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
ERROR: could not find channel '291' in channel list
$ azap -r 145
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
ERROR: error while parsing modulation (syntax error)

Not sure what to try next.

b.