If I understand correctly the Pi 4 changes the GPU to 600 Mhz when operating in 4K. Why not always operate at 600Mhz?
If 600Mhz is a normal clock operating mode, then what have some of you been able to clock the GPU beyond 600? Tom's Hardware tested at 600 with good results, but again that doesn't seem like really pushing the GPU beyond stock.
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Re: Raspberry Pi 4 Thread - general discussion
With the first 3 bytes fixed and last 3 bytes to play with, you get only 16 million unique MAC addresses and they’ve already sold 26 million units! Expect to see more 3 byte (or six hex digit) prefixes for RPF or RPT!jbudd wrote: ↑Thu Jun 27, 2019 11:57 amWiFi MAC address changes
My older Pis up to Pi 3B all have MAC addresses B8:27:EB:xx:xx:xx (Raspberry Pi Foundation)
The Pi4 has DC:A6:32:xx:xx:xx (Raspberry Pi Trading)
What's the significance of this change - apart from making the Pi a bit harder to spot in IpScan24?
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Re: Raspberry Pi 4 Thread - general discussion
Nope. Just expect to see more address collisions. Rare for individuals. More common to large to very large commercial installations. The issue has already come up and been seen "in the wild".Bakul Shah wrote: ↑Thu Jun 27, 2019 7:34 pmWith the first 3 bytes fixed and last 3 bytes to play with, you get only 16 million unique MAC addresses and they’ve already sold 26 million units! Expect to see more 3 byte (or six hex digit) prefixes for RPF or RPT!jbudd wrote: ↑Thu Jun 27, 2019 11:57 amWiFi MAC address changes
My older Pis up to Pi 3B all have MAC addresses B8:27:EB:xx:xx:xx (Raspberry Pi Foundation)
The Pi4 has DC:A6:32:xx:xx:xx (Raspberry Pi Trading)
What's the significance of this change - apart from making the Pi a bit harder to spot in IpScan24?
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Re: Raspberry Pi 4 Thread - general discussion
While it is true that one can not assume unique hardwired MAC addresses, every device on any given IP subnet does need a unique MAC address. Debugging duplicates can be very painful. Device vendors try to minimize address collisions so as to avoid a bad reputation -- may be they'd sell devices with using the same addresses in different parts of the world but not in the same part. I'd expect RPT to be mindful of this.W. H. Heydt wrote: ↑Thu Jun 27, 2019 8:29 pmNope. Just expect to see more address collisions. Rare for individuals. More common to large to very large commercial installations. The issue has already come up and been seen "in the wild".Bakul Shah wrote: ↑Thu Jun 27, 2019 7:34 pmWith the first 3 bytes fixed and last 3 bytes to play with, you get only 16 million unique MAC addresses and they’ve already sold 26 million units! Expect to see more 3 byte (or six hex digit) prefixes for RPF or RPT!
I did a quick check on IEEE and the top N companies with multiple MAC prefixes are:
Code: Select all
876 Cisco Systems
711 Apple
556 HUAWEI TECHNOLOGIES CO.
529 Samsung Electronics Co.
307 ARRIS Group
268 Intel Corporate
197 Texas Instruments
175 IEEE Registration Authority
171 zte corporation
150 Hewlett Packard
Code: Select all
wget http://standards-oui.ieee.org/oui/oui.csv
cut -d, -f 3 oui.csv| sed 's/"//g'|sort|uniq -c|sort -nr|head -10
Last edited by Bakul Shah on Thu Jun 27, 2019 9:55 pm, edited 2 times in total.
Re: Raspberry Pi 4 Thread - general discussion
Make little difference to speed, but a big difference to the SoC temperature. So unless you need it, we disable it to keep temperatures down.bunklung wrote: ↑Thu Jun 27, 2019 7:30 pmIf I understand correctly the Pi 4 changes the GPU to 600 Mhz when operating in 4K. Why not always operate at 600Mhz?
If 600Mhz is a normal clock operating mode, then what have some of you been able to clock the GPU beyond 600? Tom's Hardware tested at 600 with good results, but again that doesn't seem like really pushing the GPU beyond stock.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
Contrary to popular belief, humorous signatures are allowed.
I've been saying "Mucho" to my Spanish friend a lot more lately. It means a lot to him.
Contrary to popular belief, humorous signatures are allowed.
I've been saying "Mucho" to my Spanish friend a lot more lately. It means a lot to him.
Re: Raspberry Pi 4 Thread - general discussion
On the Pi4B the peripheral base address appears to be 0xfe000000 from Linux. The offsets to the various peripherals from that base address appear to be unchanged.BlindDevelopment wrote: ↑Thu Jun 27, 2019 2:34 pmHas there been any indication as to when the BCM2711 Peripherals Specification will be released, or more specifically the memory addresses of the GPIO registers to be access via C/C++?
Haven't found anything myself, but screen reading sometimes misses things.
Cheers!
Re: Raspberry Pi 4 Thread - general discussion
That's nothing. Someone in a previous post said HTML port.
Antikythera
Re: Raspberry Pi 4 Thread - general discussion
So I plugged in a Samsung phone charger that supplies 5.12 volts at 2 amps........so far, no dreaded low voltage lightning bolt.
So far, I have the pi running youtube videos on a web browser, the current drain has ranged from .6A to .9A.
So far, I have the pi running youtube videos on a web browser, the current drain has ranged from .6A to .9A.
Antikythera
Re: Raspberry Pi 4 Thread - general discussion
How much GPU should I set?
I'm thinking of running youtube videos and general web browsing, videos, etc...
I'm thinking of running youtube videos and general web browsing, videos, etc...
Antikythera
Re: Raspberry Pi 4 Thread - general discussion
So can I use a bluetooth headset with the pi? Would the mic work?
Antikythera
Re: Raspberry Pi 4 Thread - general discussion
Hi!
DPI display Works PI4:
Update Raspbian Jessie on pi3. (where the display is already set and works …)
1. In the files /etc/apt/sources.list and /etc/apt/sources.list.d/raspi.list, change every use of the word “stretch” to “buster”.
2. In a terminal, sudo apt update and then sudo apt dist-upgrade
3. Wait for the upgrade to complete, answering ‘yes’ to any prompt. There may also be a point at which the install pauses while a page of information is shown on the screen – hold the ‘space’ key to scroll through all of this and then hit ‘q’ to continue.
4. The update will take anywhere from half an hour to several hours, depending on your network speed. When it completes, reboot your Raspberry Pi...
5. Reboot
6. If all is well, then shut down pi3. SD card transfer to pi4. It will start Raspbian buster, and the display perfect, not dark.
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Re: Raspberry Pi 4 Thread - general discussion
I'm sorry if someone already asked this, but would the Pi 4 support dual 1440x900 @ 60fps?
Also, does anyone know of any cases that support having a fan for the rpi4? This little Pi runs a bit toasty.
And one more thing, I've seen little fans that you can tape to the top of the heatsinks on Pi boards. Anyone know where to get those and the heatsinks?
Also, does anyone know of any cases that support having a fan for the rpi4? This little Pi runs a bit toasty.
And one more thing, I've seen little fans that you can tape to the top of the heatsinks on Pi boards. Anyone know where to get those and the heatsinks?
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Re: Raspberry Pi 4 Thread - general discussion
Assuming the FLIRC case for Pi4 works like previous ones that is a good choice. It typically lowers temperatures by about 30'C without a fan (the whole case is an aluminium heat sink). See: https://kodi.tv/article/flirc-kodi-edit ... pi-4b-caseMrMcTiller wrote: ↑Fri Jun 28, 2019 5:44 pmAlso, does anyone know of any cases that support having a fan for the rpi4? This little Pi runs a bit toasty.
And one more thing, I've seen little fans that you can tape to the top of the heatsinks on Pi boards. Anyone know where to get those and the heatsinks?
(not available yet, but can preorder).
Re: Raspberry Pi 4 Thread - general discussion
Try the command "vcgencmd get_throttled" after running a typical workload.
If it says 0x0 (zero) you have nothing to worry about temperature wise.
Outside of a case its unlikely to throttle, even without a heat sink.
Unless perhaps you live in the tropics - or central Europe

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Re: Raspberry Pi 4 Thread - general discussion
Where I live, about 30 miles NE of San Francisco, CA, we get days where it runs over 100F and this area is hardly described as "tropics". There are places I've been NE about 150 miles of where I live that have hit over 120F in the summer.
One is reminded of the (possibly apocryphal) headline from the Times of London: 80 degrees again today, no relief in sight. Goes well with the other supposed headline...Fog over the channel. Europe cut off.
Re: Raspberry Pi 4 Thread - general discussion
What WiFi/BLE chipset is used on the new Pi 4B?
I am guessing a Cypress (Broadcom) part, but does anyone know the part number?
Will is support simultaneous AP + STA (client) mode like the CYW43438 on the Pi 3B?
We have one on backorder, so when it arrives with can query iw list to check ourselves.
I am guessing a Cypress (Broadcom) part, but does anyone know the part number?
Will is support simultaneous AP + STA (client) mode like the CYW43438 on the Pi 3B?
We have one on backorder, so when it arrives with can query iw list to check ourselves.
Re: Raspberry Pi 4 Thread - general discussion
Not quite related to the previous discussion, but for the Engineers:
I've been watching many of the Pi 4 review videos (and I'm sure you have too), and I've noticed that many (at least in my recommendations, almost all) of the reviewers are opening up Chromium and trying to play even 1080p and complaining that it still can't play 4K video. Of course, I know this is ridiculous because this version of Chromium even has the GPU specially disabled, but the reviewers don't seem to know that.
My point is, when the GPU is re-enabled on Chromium, it might be worth publishing an official blog post on the RPi website not only describing why the GPU was disabled in Chromium, that performance is better know, but also how to effectively access the GPU (i.e. use LibreElec). Misunderstandings about how the GPU is used and how it "isn't that much of an improvement for video - look at YouTube!" are everywhere.
I've been watching many of the Pi 4 review videos (and I'm sure you have too), and I've noticed that many (at least in my recommendations, almost all) of the reviewers are opening up Chromium and trying to play even 1080p and complaining that it still can't play 4K video. Of course, I know this is ridiculous because this version of Chromium even has the GPU specially disabled, but the reviewers don't seem to know that.
My point is, when the GPU is re-enabled on Chromium, it might be worth publishing an official blog post on the RPi website not only describing why the GPU was disabled in Chromium, that performance is better know, but also how to effectively access the GPU (i.e. use LibreElec). Misunderstandings about how the GPU is used and how it "isn't that much of an improvement for video - look at YouTube!" are everywhere.
The WiFi chipset has not been changed in any way. The Bluetooth 5.0 / 5GHz broadband was a firmware update, but the chipset itself remains the same.mkirk wrote: What WiFi/BLE chipset is used on the new Pi 4B?
Re: Raspberry Pi 4 Thread - general discussion
W. H. Heydt,
It has been over that temperature everyday for a week or more my apartment, with all the doors and windows open. I'm in Finland!
Did you not see the news today of record temperatures in France, Germany and Spain?
The Pi is going to need all the cooling it can get as we push climate change over the edge!
Apocryphal or not. 80F is only 26.7C.One is reminded of the (possibly apocryphal) headline from the Times of London: 80 degrees again today, no relief in sight.
It has been over that temperature everyday for a week or more my apartment, with all the doors and windows open. I'm in Finland!
Did you not see the news today of record temperatures in France, Germany and Spain?
The Pi is going to need all the cooling it can get as we push climate change over the edge!
Memory in C++ is a leaky abstraction .
Re: Raspberry Pi 4 Thread - general discussion
This does not make sense, the Pi 3B has CYW43438 chip that does not support 5 GHz WiFi
But 4B does support 5 GHz WiFi, so is is not the CYW43438 chip.
Did you mean to say the 4B uses the same chipset as the Pi 3B+ (not 3B)?
https://www.cypress.com/file/358916/download CYW43455
But 4B does support 5 GHz WiFi, so is is not the CYW43438 chip.
Did you mean to say the 4B uses the same chipset as the Pi 3B+ (not 3B)?
https://www.cypress.com/file/358916/download CYW43455
Re: Raspberry Pi 4 Thread - general discussion
I was referring to the previous generation of Raspberry Pi, which is the 3B+.
Re: Raspberry Pi 4 Thread - general discussion
Oh dear. I'm never living this one down am I?

Hello!
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Re: Raspberry Pi 4 Thread - general discussion
Blame it on autocorrect and your off the hook.

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Re: Raspberry Pi 4 Thread - general discussion
Thank you for that.dom wrote: ↑Fri Jun 28, 2019 5:54 pmAssuming the FLIRC case for Pi4 works like previous ones that is a good choice. It typically lowers temperatures by about 30'C without a fan (the whole case is an aluminium heat sink). See: https://kodi.tv/article/flirc-kodi-edit ... pi-4b-caseMrMcTiller wrote: ↑Fri Jun 28, 2019 5:44 pmAlso, does anyone know of any cases that support having a fan for the rpi4? This little Pi runs a bit toasty.
And one more thing, I've seen little fans that you can tape to the top of the heatsinks on Pi boards. Anyone know where to get those and the heatsinks?
(not available yet, but can preorder).
So... any idea on the dual 1440x900 @ 60FPS?
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Re: Raspberry Pi 4 Thread - general discussion
Since the Pi4 supports dual 4K monitors, and 1440x900 is well below that, then yes, dual 900p monitors should work fine.
My mind is like a browser. 27 tabs are open, 9 aren't responding,
lots of pop-ups...and where is that annoying music coming from?
lots of pop-ups...and where is that annoying music coming from?
Re: Raspberry Pi 4 Thread - general discussion
The big question I would think with such monitors is whether the monitor supports it's full resoloution over HDMI or not.
IIRC HDMI was only recently upgraded to support high-res (> 1600x1200) monitors, so older monitors may only support their full resoloution on displayport or dual-link DVI.
IIRC HDMI was only recently upgraded to support high-res (> 1600x1200) monitors, so older monitors may only support their full resoloution on displayport or dual-link DVI.