[mythtv-users] hdpvr rmmod hanging

Sun Oct 19 15:28:40 UTC 2014

On 10/19/2014 09:11 AM, Ken Truesdale wrote:
> On Oct 19, 2014, at 1:51 AM, Martin Compton wrote:
>
>> On 10/18/2014 03:19 PM, Ken Truesdale wrote:
>>>
>>> I’m new to the HD-PVR and have recently installed it on my working 
>>> backend.  It is mostly working now – I can tune live TV using it and 
>>> recordings fire off a channel change.  I’ve got a problem with my 
>>> channel change script when starting a recording (which doesn’t 
>>> happen with live TV) but I should be able to figure that out on my 
>>> own.  But I also see that the HD-PVR sometimes doesn’t stop 
>>> recording.  The show it tried to record (but recorded a different 
>>> program instead due to the aforementioned script issue) lasted a 
>>> half hour and MythTV seems to have correctly stopped recording at 
>>> the half hour mark even though the HD-PVR didn’t get the 
>>> notification to stop recording.
>>>
>>> To try and debug it, I thought about looking into a script to reload 
>>> the hdpvr module.  Seemed simple enough and there are script 
>>> examples out there.  But when I try typing the following in the 
>>> command line:
>>>
>>>      sudo modprobe -r -v hdpvr
>>>
>>> the command just hangs there indefinitely showing:
>>>
>>>     rmmod hdpvr
>>>
>>> I can kill the sudo process that kicked off the modprobe but I can’t 
>>> kill the modprobe process.  The only way I have found to clear the 
>>> problem is a reboot and even then, during shutdown, the process 
>>> won’t die and hangs the computer on the waiting for processes to end 
>>> step requiring me to push and hold the power button.  Nasty.  
>>> Clearly something is very wrong somewhere.
>>>
>>> This is what I see in dmesg before trying the modprobe –r:
>>>
>>>     [   15.456135] hdpvr 1-3:1.0: firmware version 0x1e dated Mar  7 
>>> 2012 08:25:15
>>>
>>>     [   15.966780] hdpvr 1-3:1.0: device now attached to video0
>>>
>>>     [   15.966841] usbcore: registered new interface driver hdpvr
>>>
>>> And this is what I see from dmesg after the modprobe –r starts (and 
>>> then hangs):
>>>
>>>     [   15.456135] hdpvr 1-3:1.0: firmware version 0x1e dated Mar  7 
>>> 2012 08:25:15
>>>
>>>     [   15.966780] hdpvr 1-3:1.0: device now attached to video0
>>>
>>>     [   15.966841] usbcore: registered new interface driver hdpvr
>>>
>>>     [  846.134280] usbcore: deregistering interface driver hdpvr
>>>
>>>     [  846.134308] hdpvr 1-3:1.0: device video0 disconnected
>>>
>>> If I don’t plug in the USB connection to the HD-PVR when I boot up, 
>>> the hdpvr module doesn’t get loaded, of course.  So I can modprobe 
>>> hdpvr and it loads fine.  Then I can modprobe –r no problem.  The 
>>> inability to remove the hdpvr module could be related to the way the 
>>> device keeps recording sometimes.  So I’m hopeful that fixing one 
>>> will fix the other.  But I’m out of ideas about what to check or 
>>> what could be the source of the problem.
>>>
>>> I am running Mythbuntu so my setup for the HD-PVR was pretty easy.  
>>> Mostly just plugged it in and set it up in the Backend setup.  A few 
>>> extra steps to enable the IR flashing.  And I did start with 
>>> updating the firmware to the latest using a Windows computer.
>>>
>>> I have checked my BIOS settings for USB settings.  I don’t have much 
>>> in there for options (6 year-old ASUS BYO) and what is there seems 
>>> to things set appropriately, at least as far I can tell.
>>>
>>> Anybody have suggestions on where to look to chase down a problem 
>>> like this (or these, as the case may be)?  Thanks!!
>>>
>>
>>
>> Occasionally one of my 2 HD-PVRs look like they are still recording 
>> when they aren't, but the recording itself is valid.
>> In those cases, cycling the on/off button with a 10 second delay 
>> corrects the problem.
>> If you are using the HD-PVR IR blaster, a reset does require a reload 
>> of a lirc daemon if needed.
>>
>> I am using MythTV 0.27.3 on Ubuntu 12, and HD-PVR firmware 0x1e, the 
>> most recent and preferred firmware as it corrects some issues.  I 
>> would definitely not mess with your firmware.
>>
>> Check your computer's USB port: should be rev2.
>
>
> Martin, when you say USB port should be rev2, you mean the USB port 
> should be a USB 2.0 connector, right?  I don't have USB 3.0 on this 
> Mobo (P5N7A-VM) so that shouldn't be an issue here.  And I have 
> confirmed that I have the USB 2.0 enabled in the BIOS and with 
> "HiSpeed (480Mbps)".  The BIOS also has a choice for "Legacy USB 
> Support" which I have tried disabling but that's had no impact on the 
> HD-PVR situation.
>
> Also, Martin, you may be seeing something similar to me when you 
> describe that the HD-PVR looks like it is still recording.  In other 
> words, the HD-PVR is still streaming the data through USB but Myth has 
> just stopped storing the stream.  My concern is that this behavior 
> would cause a recording failure on a future recording and that I 
> wouldn't be aware of the problem to do the power cycling.  Martin, can 
> you try doing the "sudo modprobe -r -v hdpvr" and see if you can 
> unload it successfully?
>
> From Greg, it seems that an older firmware is working for him (Greg, 
> what Myth version and what distro and kernel version?).  But for 
> Martin, the newest firmware (which is the one I have - see above dmesg 
> output) is working for him with Ubuntu 12.  I am using Ubuntu 14 (with 
> the same version of Myth, 0.27.3, but I don't think the Myth version 
> has much to do with this issue).  Is there anybody reading this using 
> Ubuntu 14.04 (kernel 3.13.0-35) and HD-PVR firmware 0x1e?  And if so, 
> how are things working for you?  Or perhaps, more generically, how is 
> the HD-PVR working for people with Ubuntu 14?
>
>
> Ken.
>
>
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I am using pre 0.28 and Ubuntu 14.04 with kernel version 
3.13.0-37-generic..     I have been using a HD-PVR since they first came 
on the scene,and never had any issues except for one driver version 
caused the video to wash out..
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