hvr950q stopped working: read of drv0 never returns

hvr950q stopped working: read of drv0 never returns

[Brian J. Murrell]

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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.


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Re: hvr950q stopped working: read of drv0 never returns

[Devin Heitmueller]

On Mon, Aug 23, 2010 at 12:32 AM, Brian J. Murrell
<brian@interlinx.bc.ca> wrote:
> 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 ]

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

Re: hvr950q stopped working: read of drv0 never returns

[Brian J. Murrell]

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On Mon, 2010-08-23 at 07:19 -0400, Devin Heitmueller wrote: 
> 
> Hi Brian,

Hi Devin,

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

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.


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