DeviceHostWindows.exe Crashing PC

[andrewj]

Hi All. I think I'm slowly peeling back multiple layers of issues here.

Channels now refreshed from scratch. All names look sensible and I know they are all currently available on my tuner. Apologies if I didn't understand the "copy" instruction first time round, but it worked for the secondary tuners.

I didn't get anything auto-mapped to SD, but I manually set all the channels I'm interested in. Doing the channel refresh and building the SD list from scratch has cleared an odd warning I was getting with the SD update, so that's all clean now.

I'm beginning to suspect that the crashes are due to faulty tuner hardware. After it crashed yesterday I unplugged Tuner 2 and noticed it was running a bit hot. Let's see if that improves the system stability.

Re channel sorting, this did work in the old version of the client, but it may have been an unintended and undocumented feature!   It might be one to put on the future improvements list. In the UK the channels of most interest (e.g. BBC1 HD) are all on channels with numbers above 100, so they are low down in the EPG compared with a lot I use less frequently. The ability to put them at the top (which did work, even if unintentionally) was great.

Thanks for all the help. I'll let you know if this has stabilised things.

[jimil]

sorting, this did work in the old version of the client, but it may have been an unintended and undocumented feature!   It might be one to put on the future improvements list. In the UK the channels of most interest (e.g. BBC1 HD) are all on channels with numbers above 100, so they are low down in the EPG compared with a lot I use less frequently. The ability to put them at the top (which did work, even if unintentionally) was great.

You can still sort the channels in any order you wish.
 If you go to Settings/Channels (Web App) you can set the order the channels display in by using the spanner icon to Edit Channel Details. 
By changing the number you can put the channels in any order you want (you can also rename then here) changing the channel order (or channel names) here also changes the channel order (or names) in any groups that the channel is or that you create.  It's a little clunky (drag/drop would be easier) especially if you have a lot of channels but it does work, previous version was the same. When I first set up NPVR about 18 months ago I used this method to put the channels in the same order as on my Topfield PVR

[mvallevand]

To clarify something I said earlier I did some testing with <SortChannelGroups> and I was wrong about how it works, it doesn't turn off sorting sorting in groups, it defines the order that groups are display. So you can get delete all your groups set the sort to false and maybe put your favourites in one group, add another for the channels over 100 you faster navigation. Switching groups is pretty fast in NextPVR.exe and UI cliients, Kodi etc.

Martin

[andrewj]

Hi All,
I've managed to stabilise my system, as follows:

• Moved recording to another PC. This is working fine, using the same Hauppage tuners & settings. One thing to note is that this system has only ever had NPVR 7.0 installed, and I made sure to only install the latest Hauppage drivers.
  
• Stopped and disabled NPVR on the original system
  
• Deleted the old tuner devices and their drivers. I had to do this twice until plugging one in got a "driver needed" alert
  
• Manually deleted C:\Windows\System32\Drivers\EMBDA64.sys, which was consistently reported as the faulting module in the crashes. That hasn't caused any problems, so it was only being used by the tuners
  

Noting that the problems on the original system persisted when I unplugged the tuners in turn, and that the problems haven't manifested on the other system, means it doesn't look like a tuner hardware fault.

Now I completely get what sub is saying about managed vs kernel code, and I'm not directly blaming NPVR, but it's clear that the "TV recording activity" was causing the problems. It might be worth reviewing whether we can get any clues to the underlying issue from the various logs and dumps.

I would like to return recording to the original system, but at the moment I can't afford to destabilise it again. I'm also waiting to see if recording on the other system has the same problem of intermittent glitches in the recordings, which has been a long-running nuisance on the main system.

When I do so I plan to:

• Completely delete NPVR
  
• Reboot and delete the NPVR data directories (I have the recordings etc. on the other system)
  
• Re-install NVPR 7.0
  
• Re-install the tuners with the new drivers
  
• Set up from scratch, copying recordings etc. across from the other system
  

Can anyone think of anything else I need to do?
Thanks, Andrew