[mythtv-users] Trouble with VFD

[Eric Yanush]

On 2010-03-25, at 4:44 PM, Eric Yanush wrote:

>> From: Jarod Wilson <jarod at wilsonet.com>
>> Date: March 22, 2010 3:15:23 PM CST
>> To: Discussion about mythtv <mythtv-users at mythtv.org>
>> Subject: Re: [mythtv-users] Trouble with VFD
>> Reply-To: Discussion about mythtv <mythtv-users at mythtv.org>
>> 
>> 
>> On Fri, Mar 19, 2010 at 9:41 PM, Eric Yanush <yanush2e at uregina.ca> wrote:
>>>> 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...
>>> 
>>> Sorry.. I do mean  sudo echo...
>>> I did try using sudo chmod 755 /dev/lcd0 and then sudo echo... and then I get the
>>> -bash: /dev/lcd0: Device or resource busy
>> 
>> In that case, your device would appear to be behaving identically to
>> mine for all the things listed as tried in this thread. If you spin up
>> both LCDd and lcdproc, does the device not function?
>> 
>> -- 
>> Jarod Wilson
>> jarod at wilsonet.com
>> 
> 
> 
> Sorry about the delay in replies, it has been an insane week at work, (built an in-ground swimming pool for a 3 day long trade show:D) 
> If I have the lirc_imon loaded and LCDd and lcdproc running I get nothing. 
> 
> But I got smart today and plugged the thing into my macbook pro, running karmic, installed lirc, and lcdproc, and bingo it worked...
> So now I am wondering if it has something to do with the chipset on the motherboard asus p7h55-m pro. I am running kernel 2.6.31-14.
> 
> Eric 



For the record, I just solved this one... it seems that there is a timing error, and the patch found here remedies that issue
https://bugs.launchpad.net/ubuntu/+source/lirc/+bug/517956

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