[mythtv-users] Trouble with VFD

[Jarod Wilson]

On Fri, Mar 19, 2010 at 1:07 AM, Eric Yanush <yanush2e at uregina.ca> wrote:
>>>> Hi,
>>>>
>>>> I having alot of trouble getting an antec veris elite vfd/ir combo to
>>>> work
>>>> under ubuntu karmic.
>>>> I can get the ir portion to function with no problems, but cannot get
>>>> any
>>>> sign of life from the vfd.
>>>> it has a device id of 0x0044
>>>>
>>>> After configuring lirc and lcdproc I end up with a dmesg output of :
>>>>
>>>> [   21.408199] lirc_imon: send_packet: packet tx failed (-32)
>>>> [   21.408203] lirc_imon: vfd_write: send packet failed for packet #2
>>>> [   21.656487] lirc_imon: send_packet: packet tx failed (-32)
>>>> [   21.656490] lirc_imon: vfd_write: send packet failed for packet #1
>>>> [   22.279698] lirc_imon: send_packet: packet tx failed (-32)
>>>> [   22.279701] lirc_imon: vfd_write: send packet failed for packet #1
>>>> [   22.520654] eth0: no IPv6 routers present
>>>> [   22.780632] lirc_imon: send_packet: packet tx failed (-32)
>>>> [   22.780635] lirc_imon: vfd_write: send packet failed for packet #5
>>>> [   22.903530] lirc_imon: send_packet: packet tx failed (-32)
>>>> [   22.903532] lirc_imon: vfd_write: send packet failed for packet #2
>>>> [   23.277822] lirc_imon: send_packet: packet tx failed (-32)
>>>> [   23.277826] lirc_imon: vfd_write: send packet failed for packet #2
>>>> [   23.778395] lirc_imon: send_packet: packet tx failed (-32)
>>>> [   23.778399] lirc_imon: vfd_write: send packet failed for packet #5
>
>>>>
>
>>>>
>
>>>> if I try the echo 'Hello mythtv... command with any combination of
>>>> lcdproc
>>>> and lirc running, with the lirc_imon driver loaded i get:
>>>>
>>>> -bash: /dev/lcd0: Permission denied
>>>>
>>>> run either as user or as root.
>>>>
>>>> Any ideas?
>>>
>>> -32 is -EPIPE... No clue wtf would trigger that. I have the exact same
>>> hardware in my own myth frontend box, works perfectly. What lcdproc
>>> driver are you trying to use to drive it?
>>>
>>> I have tried both lcdproc 0.5.2 and 0.5.3, with the imon driver, and the
>>> lirc modules lirc_imon and lirc_dev
>
>>I got nothin' then, that combo works perfectly here. Can you verify
>>the device isn't faulty by spinning it up under Windows?
>
> Works just fine under windows 7.

The 'permission denied' trying to write to /dev/lcd0 even as root
sounds highly suspicious. Not sure what the fix would be though.

Just tried something... As a normal user, I get similar behavior. As
root, I get:

# echo foo > /dev/lcd0
-bash: /dev/lcd0: Device or resource busy

When you say "as root", you don't mean "sudo echo foo > /dev/lcd0", do
you? Because that's *not* the same...

-- 
Jarod Wilson
jarod at wilsonet.com