[mythtv-users] hdpvr rmmod hanging

[Ken Truesdale]

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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