ejolson
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Re: Raspberry Pi 4 Thread - general discussion

Fri Sep 06, 2019 4:07 pm

jamesh wrote:
Fri Sep 06, 2019 3:18 pm
And note that the Pi doesn't technically overheat. It throttles itself so it doesn't overheat, as do PC's and phones etc nowadays.
According to
SynGreis wrote:
Fri Sep 06, 2019 11:54 am
I cannot put the case on because it overheats and shuts off while giving me the temperature warning. Before it shuts down i run the command

vcgencmd measure_temp

And it tells me that its anywhere between 90 to 90 celcius.
The shutting off bit makes me think that Pi actually is overheating.

While similar comments on how the Pi 4B throttles for heat management have been reported before, the number of reports indicate additional information: the temperature of the Pi owners.

Having said this, I have my 4B mounted vertically to a piece of wood and have yet to see problems, even when a fan is not blowing on it. I think there must be some variations in the shipped product.

Is the voltage fed to the SOC in each Pi somehow tuned to the individual voltage requirements of each particular part?
Last edited by ejolson on Fri Sep 06, 2019 4:29 pm, edited 2 times in total.

SynGreis
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Re: Raspberry Pi 4 Thread - general discussion

Fri Sep 06, 2019 4:18 pm

thats a good question. but i did no modifications for clock and performance.

it was overheating with stock image. I even slapped a fresh install just with buster lite(just terminal) and it was giving off those readings.

ejolson
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Re: Raspberry Pi 4 Thread - general discussion

Fri Sep 06, 2019 4:27 pm

SynGreis wrote:
Fri Sep 06, 2019 4:18 pm
thats a good question. but i did no modifications for clock and performance.

it was overheating with stock image. I even slapped a fresh install just with buster lite(just terminal) and it was giving off those readings.
Mine is the 2GB model. I wonder if the 4GB model runs noticably hotter.

Given the amount of heat generated, maybe an RMA for a new one would be approved. In some cases, threads like this have been useful in convincing the merchant you have made a reasonable effort and that an exchange is required to overcome the problem.
Last edited by ejolson on Fri Sep 06, 2019 5:16 pm, edited 2 times in total.

SynGreis
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Re: Raspberry Pi 4 Thread - general discussion

Fri Sep 06, 2019 4:29 pm

My thoughts precisely.

Unfortunately i got this from Canakit and their number is just telling people to email them.

when i receive a response ill be sure to tie them into this forum.

ejolson
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Re: Raspberry Pi 4 Thread - general discussion

Fri Sep 06, 2019 4:35 pm

SynGreis wrote:
Fri Sep 06, 2019 4:29 pm
My thoughts precisely.

Unfortunately i got this from Canakit and their number is just telling people to email them.

when i receive a response ill be sure to tie them into this forum.
My impression is that Canakit is a pretty reputable vendor. It will be interesting to see what happens.

Fraoch
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Re: Raspberry Pi 4 Thread - general discussion

Fri Sep 06, 2019 5:18 pm

ejolson wrote:
Fri Sep 06, 2019 4:27 pm
Mine is the 2GB model. I wonder if the 4GB model runs noticably hotter.
Me too - I have the 2 GB version.

Without heatsinks in open air it does reach 80 C and throttle in 100% CPU stress tests, but with heatsinks it performs much better - 75 C, no throttling. It idles at 60 C.

And this is just with cheapie heatsinks:

https://www.buyapi.ca/product/aluminum- ... b2-2-pack/

in open air, but not much air circulation.

So it's hotter than I'd like - my 2B is a champ in this regard as it rarely gets above 50 C and idles at 45 C - but I'm not seeing any big issues.

I put the smaller heatsink on the RAM, it gets very very hot - almost as hot as the main SoC heatsink. I'll have to test with an IR thermometer how hot it gets.
Pencoed-made Model 1B, Samsung memory
2B 1.1
3B+
4B 2GB

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rpdom
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Re: Raspberry Pi 4 Thread - general discussion

Fri Sep 06, 2019 5:32 pm

I don't push my 4B 4GB hard, but it doesn't get that hot.

Just as a precaution I have made a small aluminium heatsink with thermal paste. It is held in place with a bit of glue around the outside of the heatsink.

SynGreis
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Re: Raspberry Pi 4 Thread - general discussion

Fri Sep 06, 2019 6:18 pm

Canakit just got back to me, they are offering a new rpi as a replacement plus tossing in their black case, a fan and heatsinks.

alphanumeric
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Re: Raspberry Pi 4 Thread - general discussion

Fri Sep 06, 2019 7:17 pm

With no case or heatsink, just four short standoffs for feet I got 54c after doing update upgrade, ambient was 22 c.
No config.txt edits etc. Stock Buster install.

I got 41c on boot up after it had cooled down while I put my Pibow Coupe case on.
56c after sitting idle with just the desktop open for an hour or so.
51c with the heatsink on and idle for an hour or so.

It's only when I actually try to make use of its potiential that it gets really hot. :( I wasn't expecting it to hit 80c with only moderate use though. :o

MisterEd
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Re: Raspberry Pi 4 Thread - general discussion

Fri Sep 06, 2019 9:14 pm

Has anyone tried one of the PiHut cases for the Pi4? Do they allow the Pi4 to run any cooler?
Note the first one listed below is new.

Raspberry Pi 4 Case (With Cooling Fan) (NEW)
https://thepihut.com/products/raspberry ... _ref_pos=3

Dual Fan Heatsink Case for Raspberry Pi 4
https://thepihut.com/collections/raspbe ... 9594180670

Aluminium Heatsink Case for Raspberry Pi 4
https://thepihut.com/products/aluminium ... 7469816894

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jcyr
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Re: Raspberry Pi 4 Thread - general discussion

Fri Sep 06, 2019 9:23 pm

jamesh wrote:
Fri Sep 06, 2019 3:18 pm
Use the latest VLI firmware (one was released for testing yesterday which save a lot of power).
Yesterday, as in September 5th? Where might we find this. Couldn't find an announcement anywhere.
It's um...uh...well it's kinda like...and it's got a bit of...

RonR
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Re: Raspberry Pi 4 Thread - general discussion

Fri Sep 06, 2019 10:03 pm

jcyr wrote:
Fri Sep 06, 2019 9:23 pm
jamesh wrote:
Fri Sep 06, 2019 3:18 pm
Use the latest VLI firmware (one was released for testing yesterday which save a lot of power).
Yesterday, as in September 5th? Where might we find this. Couldn't find an announcement anywhere.

VLI firmware v2.0 - powersaving features enabled

alphanumeric
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Re: Raspberry Pi 4 Thread - general discussion

Fri Sep 06, 2019 10:03 pm

jcyr wrote:
Fri Sep 06, 2019 9:23 pm
jamesh wrote:
Fri Sep 06, 2019 3:18 pm
Use the latest VLI firmware (one was released for testing yesterday which save a lot of power).
Yesterday, as in September 5th? Where might we find this. Couldn't find an announcement anywhere.
This maybe? https://www.raspberrypi.org/forums/vie ... &t=250990
The feature I'm looking for is being able to boot up by momentarily grounding GPIO 3 pin 5. I can shut down that way but my Pi 4B won't boot up again?

RonR
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Re: Raspberry Pi 4 Thread - general discussion

Fri Sep 06, 2019 10:10 pm

alphanumeric wrote:
Fri Sep 06, 2019 10:03 pm
The feature I'm looking for is being able to boot up by momentarily grounding GPIO 3 pin 5. I can shut down that way but my Pi 4B won't boot up again?

This has been available since July 17:

Updated bootloader for Raspberry Pi 4

alphanumeric
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Re: Raspberry Pi 4 Thread - general discussion

Sat Sep 07, 2019 8:53 am

RonR wrote:
Fri Sep 06, 2019 10:10 pm
alphanumeric wrote:
Fri Sep 06, 2019 10:03 pm
The feature I'm looking for is being able to boot up by momentarily grounding GPIO 3 pin 5. I can shut down that way but my Pi 4B won't boot up again?

This has been available since July 17:

Updated bootloader for Raspberry Pi 4
Missed that somehow, thanks for the link. Will update latter on today. :D

fganter
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Re: Raspberry Pi 4 Thread - general discussion

Wed Sep 11, 2019 9:50 am

noggin wrote:
Sat Jun 29, 2019 10:13 am
jz1276 wrote:
Sat Jun 29, 2019 8:30 am
Can anyone tell me if the Pi 4 supports DTS-MA & Dolby True HD?
Not yet - but the issue that stopped it being possible on previous Pis has been removed.

The Pi 3B+ and below all maxed out at 4.0 192kHz PCM over HDMI, with 5.1/7.1 PCM only supported at lower sampling rates. To carry DTS HD MA or Dolby True HD you need an HDMI connection that supports 7.1 192kHz PCM over HDMI - even though you aren't running in PCM, you need that bandwidth guarantee. The Pi developers have announced that 8 channel 192kHz is supported on the Pi 4B, and that HD Audio is being worked on. (This should also allow Atmos and DTS:x passthrough too - as they are extensions to DTS HD MA or DD+/Dolby True HD bitstreams and not a new spec)
Excellent explanation. Thanks for the post.

As of today, Sept 9 2019, it does not appear to be an option with LibreELEC. Has anyone gotten it to work with another KODI distribution?

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PeterO
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Re: Raspberry Pi 4 Thread - general discussion

Wed Sep 11, 2019 11:09 am

I'm not sure if this is Pi4 or Raspbian Buster specific but I don't have a Pi3 set up right now...

I'm trying to take a screen shot which needs to include the mouse cursor, but captures taken with both GIMP and scrot do not show the cursor. The GIMP even has a "show the cursor" tick box but it makes no difference.

PeterO
Last edited by PeterO on Wed Sep 11, 2019 11:57 am, edited 1 time in total.
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clicky
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Re: Raspberry Pi 4 Thread - general discussion

Wed Sep 11, 2019 11:43 am

PeterO wrote:
Wed Sep 11, 2019 11:09 am
I'm not sure if this is Pi4 specific but I don't have a Pi3 set up right now...

I'm trying to take a screen shot which needs to include the mouse cursor, but captures taken with both GIMP and scrot do not show the cursor. The GIMP even has a "show the cursor" tick box but it makes no difference.

PeterO
Freshly made on Pi4:

Image
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PeterO
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Re: Raspberry Pi 4 Thread - general discussion

Wed Sep 11, 2019 11:56 am

Your "Works for me" reply really isn't very helpful !
nocursor.png
nocursor.png (51.22 KiB) Viewed 704 times
Not sure what you're running, but it doesn't look like standard Raspbian desktop theme,
PeterO
Last edited by PeterO on Wed Sep 11, 2019 12:03 pm, edited 1 time in total.
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Interests: C,Python,PIC,Electronics,Ham Radio (G0DZB),1960s British Computers.
"The primary requirement (as we've always seen in your examples) is that the code is readable. " Dougie Lawson

ShiftPlusOne
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Re: Raspberry Pi 4 Thread - general discussion

Wed Sep 11, 2019 12:02 pm

Just tried it on Raspbian with the 'untested' mesa build and the mouse pointer setting in gimp works.

https://www.raspberrypi.org/forums/view ... 6&t=249650

Not sure if it's the mesa update that fixes it, but it's a data point.

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PeterO
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Re: Raspberry Pi 4 Thread - general discussion

Wed Sep 11, 2019 12:04 pm

Can that be backed out if it causes other problems ?
PeterO
Discoverer of the PI2 XENON DEATH FLASH!
Interests: C,Python,PIC,Electronics,Ham Radio (G0DZB),1960s British Computers.
"The primary requirement (as we've always seen in your examples) is that the code is readable. " Dougie Lawson

ShiftPlusOne
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Re: Raspberry Pi 4 Thread - general discussion

Wed Sep 11, 2019 12:06 pm

You can remove the 'untested' component and downgrade the relevant packages. If it causes other problems it would be good to know because it's likely to hit the main repo soonish.

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PeterO
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Re: Raspberry Pi 4 Thread - general discussion

Wed Sep 11, 2019 1:13 pm

ShiftPlusOne wrote:
Wed Sep 11, 2019 12:06 pm
You can remove the 'untested' component and downgrade the relevant packages. If it causes other problems it would be good to know because it's likely to hit the main repo soonish.
Sadly it's made no difference as you can see ... The cursor should be showing over one of the two "Continue" buttons. Same application code works as expected when grabbing a screen image on a Mint19 Intel machine.
nocursor.png
nocursor.png (59.65 KiB) Viewed 647 times
However it has fixed the issue with xmag where it left outlines of the bounding box all over the screen.

PeterO
Discoverer of the PI2 XENON DEATH FLASH!
Interests: C,Python,PIC,Electronics,Ham Radio (G0DZB),1960s British Computers.
"The primary requirement (as we've always seen in your examples) is that the code is readable. " Dougie Lawson

ShiftPlusOne
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Re: Raspberry Pi 4 Thread - general discussion

Wed Sep 11, 2019 1:21 pm

Is that using gimp, scrot or either?

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PeterO
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Re: Raspberry Pi 4 Thread - general discussion

Wed Sep 11, 2019 1:31 pm

ShiftPlusOne wrote:
Wed Sep 11, 2019 1:21 pm
Is that using gimp, scrot or either?
Same result with gimp and scrot.
It happens with the mouse over other application as well.
PeterO
Discoverer of the PI2 XENON DEATH FLASH!
Interests: C,Python,PIC,Electronics,Ham Radio (G0DZB),1960s British Computers.
"The primary requirement (as we've always seen in your examples) is that the code is readable. " Dougie Lawson

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