<div dir="ltr"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
<br>
> I've just got a new Rasberry Pi 4 as a Frontend only. The wiki has been a<br>
> useful source of information and I've had mixed success.<br>
><br>
> Im currently running an up to date Rasberry Pi OS lite with the Myth TV<br>
> Light packages.<br>
><br>
> I'm getting lots of segfaults. Running myth frontend with -v all doesn't<br>
> yield anything that useful. It seems to be just after EDID exchange. It<br>
> segfaults loading mythfrontend 9 times out of 10. No idea why sometimes it<br>
> works and sometimes it doesn't. Any suggestions welcome on how to resolve<br>
> this?<br>
<br>
I am using a Raspberry Pi 400 with 4 GB as a Frontend and have a few <br>
things to suggest. The current Raspbian and MythTV Lite work fine.<br>
<br>
<br>
As for the segfault try decreaing your GPU memory (gpu_mem) ? to me <br>
sounds counter-intuitive but the ARM CPU and GPU apparently share 1GB of <br>
memory ? check /vcgencmd get_mem gpu/ and /vcgencmd get_mem arm/ ? <br>
increasing one will decrease the other. Off-hand I don?t recall what I <br>
have my RPi400 configured but a different one with Motion (surveillance <br>
utility) with two cameras works fine with gpu_mem set at 128 MB and <br>
starts choking at 256.<br>
<br>
<br>
What probably won?t matter but I?ll toss in for free advice:<br>
<br>
<br>
Use a 5 GHz channel connection as 2.4 GHz is noisy and crowded. (I have <br>
used an RPi3 as a Frontend but only connected via Ethernet as the 2.4 <br>
GHz WiFi had poor results.)<br>
<br>
<br>
Power supply. This includes the wall wart itself and the cable between. <br>
You should be seeing the low voltage indicator at the upper right-hand <br>
corner but I had an issue a while back on a different Pi4 which was <br>
resolved by swapping a Pi-approved wall wart (5.1v @ 3,000 mA) for a <br>
Pi-branded wall wart (5.1v @ 3.0A) and the problems went away. (Maybe it <br>
thought three amps was more than three thousand milliamps. <joke>)<br>
<br>
<br>
<br>
And not sure on this one but have heard some of the microSD cards are <br>
slow, so using an upper-tier name-brand card over a two-for-a-dollar <br>
off-brand may help. Also use Class 10?s. As for capacity, I have been <br>
using 16- and 32 GB units. (Storage to USB or NAS.) Tom?s Hardware had a <br>
test article (I neglected to keep the link in my notes) which for my <br>
preferences rated the SanDisk Extreme Pro as ?all-around great <br>
performance?, the Kingston Canvas React as ?mediocre 4K read/writes? and <br>
the Samsung Evo Plus as ?good price? and ?fast application open and boot <br>
time?. (So what did I do at the time? Re-ordered more SanDisk Ultra Plus.)<br>
<br>
<br>
Barry<br>
</blockquote><div><br></div><div><br></div><div><br></div><div>Hi Barry and Stephen,</div><div><br></div><div>Thanks for your replies. Your advice with the GPU memory does seem to have some effect , I had tried 256M with lots of segfaults - but at 64M it seems far less frequent. <br></div><div><br></div><div>Regarding my problems with MythMusic as part of the MythTV Light Plugins - this time I installed the standard Rasberry Pi OS rather than the lite version. MythMusic now shows and works fine. <br></div><div>It must have been some missing dependency that apt didn't pick up. <br></div><div><br></div><div>On the subject of Music - I'm planning to get an amp for the Pi <br></div><div><a href="https://www.hifiberry.com/shop/boards/hifiberry-amp2/">https://www.hifiberry.com/shop/boards/hifiberry-amp2/</a></div><div>And buy a strong PSU to go with it. <br></div><div><br></div><div>I've just got to figure out how to get Myth TV to work with some of the buttons on my basic usb fake keyboard/mouse remote control. <br></div><div><br></div><div>As the Pi runs without X , these buttons are not recognised by Myth - but the same remotes all work fine and the buttons are seen in Myths edit keys when X runs on x86. <br></div><div><br></div><div>I can see the button presses using showkey and evtest ( KEY_VOLUMEDOWN KEY_VOLUMEUP KEY_HOMEPAGE) but trying to set them inside Myth Frontends Settings->Edit Keys have the error: Pressed Key Not Recognised</div><div><br></div><div>Does anyone have any ideas?<br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div></div>