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<p style="margin-bottom: 0in; line-height: 100%">Hi Adam!</p>
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cite="mid:mailman.1.1623240002.27084.mythtv-users@mythtv.org">
<pre class="moz-quote-pre" wrap="">I've just got a new Rasberry Pi 4 as a Frontend only. The wiki has been a
useful source of information and I've had mixed success.
Im currently running an up to date Rasberry Pi OS lite with the Myth TV
Light packages.
I'm getting lots of segfaults. Running myth frontend with -v all doesn't
yield anything that useful. It seems to be just after EDID exchange. It
segfaults loading mythfrontend 9 times out of 10. No idea why sometimes it
works and sometimes it doesn't. Any suggestions welcome on how to resolve
this?</pre>
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<p style="margin-bottom: 0in; line-height: 100%">I am using a
Raspberry Pi 400 with 4 GB as a Frontend and have a few things to
suggest. The current Raspbian and MythTV Lite work fine. </p>
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<p style="margin-bottom: 0in; line-height: 100%">As for the segfault
try decreaing your GPU memory (gpu_mem) – to me sounds
counter-intuitive but the ARM CPU and GPU apparently share 1GB of
memory – check <i>vcgencmd get_mem gpu</i> and <i>vcgencmd
get_mem arm</i> – increasing one will decrease the other.
Off-hand I don’t recall what I have my RPi400 configured but a
different one with Motion (surveillance utility) with two cameras
works fine with gpu_mem set at 128 MB and starts choking at 256.</p>
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<p style="margin-bottom: 0in; line-height: 100%">What probably won’t
matter but I’ll toss in for free advice:</p>
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<p style="margin-bottom: 0in; line-height: 100%">Use a 5 GHz channel
connection as 2.4 GHz is noisy and crowded. (I have used an RPi3
as
a Frontend but only connected via Ethernet as the 2.4 GHz WiFi had
poor results.)</p>
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<p style="margin-bottom: 0in; line-height: 100%">Power supply. This
includes the wall wart itself and the cable between. You should be
seeing the low voltage indicator at the upper right-hand corner
but I
had an issue a while back on a different Pi4 which was resolved by
swapping a Pi-approved wall wart (5.1v @ 3,000 mA) for a
Pi-branded
wall wart (5.1v @ 3.0A) and the problems went away. (Maybe it
thought three amps was more than three thousand milliamps.
<joke>)</p>
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<p style="margin-bottom: 0in; line-height: 100%">And not sure on
this
one but have heard some of the microSD cards are slow, so using an
upper-tier name-brand card over a two-for-a-dollar off-brand may
help. Also use Class 10’s. As for capacity, I have been using 16-
and 32 GB units. (Storage to USB or NAS.) Tom’s Hardware had a
test article (I neglected to keep the link in my notes) which for
my
preferences rated the SanDisk Extreme Pro as “all-around great
performance”, the Kingston Canvas React as “mediocre 4K
read/writes” and the Samsung Evo Plus as “good price” and
“fast application open and boot time”. (So what did I do at the
time? Re-ordered more SanDisk Ultra Plus.)</p>
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<p style="margin-bottom: 0in; line-height: 100%">Barry</p>
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