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by lingon
Wed Apr 22, 2020 2:16 pm
Forum: Beginners
Topic: Questions about this "Raspberry Pi 4 USB SSD Boot Config" guide
Replies: 10
Views: 2247

Re: Questions about this "Raspberry Pi 4 USB SSD Boot Config" guide

Come on James, even Eben has got fed up with that line.... From twitter.... Eben Upton @EbenUpton · Apr 14 Very, very close now. I've seen it working. Turns out that getting it to work with devices connected via downstream hubs is a real pain. But it's imminent. PeterO PeterO, where on Twitter did ...
by lingon
Mon Apr 20, 2020 6:11 pm
Forum: General discussion
Topic: Raspberry Pi 4 SD-interface maximum clock frequency?
Replies: 5
Views: 595

Raspberry Pi 4 SD-interface maximum clock frequency?

According to this block diagram of the BCM2711 (in german) the SD-interface on the Raspberry Pi 4 is designated as DDR50. Is the Arasan SDIO capable of running at higher frequencies like 100 MHz or 208 MHz or is it limited to 50 MHz maximum? Is the block diagram an accurate representation of the BCM...
by lingon
Sat Mar 28, 2020 7:08 am
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 574
Views: 218890

Re: Raspberry Pi 4 usb boot?

jdb wrote:
Fri Mar 27, 2020 6:18 pm

That's for booting over USB2.0 OTG when attached to a host, not mass-storage boot. You could substitute CM4 for RPI4 in that commit message, the meaning would be the same.
OK, thanks for explaining what this really is about.
by lingon
Fri Mar 27, 2020 8:50 am
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 574
Views: 218890

Re: Raspberry Pi 4 usb boot?

According to the firmware changelog there seems to be change for the so far unannounced Compute Module 4 regarding USB-booting: firmware: USB device boot for CM4 https://github.com/raspberrypi/firmware/commit/5574077183389cd4c65077ba18b59144ed6ccd6d#diff-881cc4157ed641a365a86452f27ed745 So getting U...
by lingon
Sun Feb 02, 2020 7:15 pm
Forum: General discussion
Topic: kernel: ARM: dts: Declare RPi 4B SD card power regulator?
Replies: 2
Views: 407

Re: kernel: ARM: dts: Declare RPi 4B SD card power regulator?

ktb wrote:
Sun Feb 02, 2020 7:12 pm
I'm not sure, but it probably stands for Device Tree Source
You are right, that sounds also very plausible.
by lingon
Sun Feb 02, 2020 7:05 pm
Forum: General discussion
Topic: kernel: ARM: dts: Declare RPi 4B SD card power regulator?
Replies: 2
Views: 407

kernel: ARM: dts: Declare RPi 4B SD card power regulator?

The firmware changelog contains this comment: kernel: ARM: dts: Declare RPi 4B SD card power regulator AFAIK DTS stands for Data Transfer Speed. Does this mean that the RPi 4B SD-card reader will support UHS-I speeds or is this change about something else? https://github.com/raspberrypi/firmware/com...
by lingon
Thu Jan 23, 2020 1:57 pm
Forum: Troubleshooting
Topic: Unable to decrypt user after firmware update Pi v4
Replies: 8
Views: 598

Re: Unable to decrypt user after firmware update Pi v4

It might be that you suffer from the side effects of the update discussed in this thread https://www.raspberrypi.org/forums/view ... 8&t=262649.
by lingon
Tue Jan 14, 2020 8:49 am
Forum: Ubuntu
Topic: Latest VideoCore "firmware" for Ubuntu?
Replies: 2
Views: 774

Re: Latest VideoCore "firmware" for Ubuntu?

Thanks for the suggestion to look at the Ubuntu resources. It turned out however that the GPU "firmware" package is created by waveform80 https://www.raspberrypi.org/forums/viewtopic.php?f=131&t=254649&start=50#p1556639 who is also on this forum. So it could be that for at least this particular pack...
by lingon
Wed Jan 08, 2020 9:15 am
Forum: Ubuntu
Topic: Latest VideoCore "firmware" for Ubuntu?
Replies: 2
Views: 774

Latest VideoCore "firmware" for Ubuntu?

The VideoCore "firmware" for Ubuntu is distributed in the package linux-firmware-raspi2 at https://launchpad.net/ubuntu/+source/linux-firmware-raspi2 . The latest Ubuntu release of the GPU "firmware" is from the 15th of August 2019: vcgencmd version Aug 15 2019 12:03:51 Copyright (c) 2012 Broadcom v...
by lingon
Tue Jan 07, 2020 8:35 pm
Forum: General discussion
Topic: EMMC card?
Replies: 4
Views: 455

EMMC card?

The Raspberry Pi4 bootloader EEPROM release notes at https://github.com/raspberrypi/rpi-eeprom/blob/master/firmware/release-notes.md has a line which reads for the version 2019-11-18 - Git b6a7593d6 (BETA) RC1: * Enable high-speed mode for EMMC cards. Where in a Raspberry Pi can an EMMC card be found?
by lingon
Mon Dec 02, 2019 2:22 pm
Forum: General discussion
Topic: New Pi 4B v1.2?
Replies: 331
Views: 63537

Re: New Pi 4B v1.2?

Comparing the pictures there is 7 soldered pins where the uSD-card is inserted into the reader on the Rev 1.1. and 8 soldered pins on the Rev 1.2. Could this be related to an enhancement of the SD-card speed?
by lingon
Mon Dec 02, 2019 1:42 pm
Forum: General discussion
Topic: New Pi 4B v1.2?
Replies: 331
Views: 63537

Re: New Pi 4B v1.2?

This link contains images that are claimed to be of the underside of a Raspberry Pi Model 4 B Rev 1.1 and a Rev 1.2. It is shown that there are some changes on the Rev 1.2 above the letter "I" in the text "MICRO SD CARD". http://akkiesoft.hatenablog.jp/entry/20191128/1574911998 Any ideas what these ...
by lingon
Thu Nov 21, 2019 1:43 pm
Forum: General discussion
Topic: New Pi 4B v1.2?
Replies: 331
Views: 63537

Re: New Pi 4B v1.2?

This new Rev 1.2 string is reported by /proc/cpuinfo and by dmesg, so it has some implications for the software. If the Rev 1.2 changes would be fully transparent for the software, then it would hardly make any sense to report the revision in /proc/cpuinfo. Small component changes on the board might...
by lingon
Sat Oct 19, 2019 7:55 pm
Forum: Ubuntu
Topic: Ubuntu 19.10 (Eoan Ermine) released
Replies: 81
Views: 27899

Re: Ubuntu 19.10 (Eoan Ermine) released

The USB-problem concerning the Raspberry Pi 4GB RAM model might be due to the issue seen earlier that using more RAM than 3072 MB breaks the USB: https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=246766&start=25 The issue was solved by a kernel patch: https://www.raspberrypi.org/forums/viewtop...
by lingon
Mon Aug 19, 2019 11:09 am
Forum: General discussion
Topic: How's it been going with 2 GB vs. 4 GB?
Replies: 12
Views: 2727

Re: How's it been going with 2 GB vs. 4 GB?

Hello Planning to buy my first Pi 4. The 2 GB version is immediately available. The 4 GB version requires a 2 to 3 week wait. What do people generally think? How many have bought the 2 GB version but would really have wanted the 4 GB version? And how many have bought the 4 GB version but clearly se...
by lingon
Mon Nov 02, 2015 7:03 am
Forum: Graphics, sound and multimedia
Topic: So what's the state of WebGL?
Replies: 13
Views: 4768

Re: So what's the state of WebGL?

https://github.com/Metrological/buildroot Which builds a buildroot with a really simple webbrowser with WebGL, using their layer between WebGL and OpenGLES. Then, there's Anholt's mesa drivers, which I've installed using the readymade images, and that works as well with WebGL, making a OpenGL drive...
by lingon
Mon Nov 02, 2015 6:56 am
Forum: General discussion
Topic: Is there a solution to enable webgl on raspberry pi ?
Replies: 2
Views: 1016

Re: Is there a solution to enable webgl on raspberry pi ?

There is discussion on this topic in this thread viewtopic.php?f=38&t=120978.
by lingon
Tue Sep 22, 2015 2:28 pm
Forum: General discussion
Topic: Video Core Source – 1 Year On
Replies: 47
Views: 18265

Re: Video Core Source – 1 Year On

I have downloaded gohais image 20150808-1312-vc4-image.zip from http://sukzessiv.net/~gohai/vc4-buildbot/build/ . With that I was able to start tuxracer. It was not playable and there were problems with drawing the screen, but it looks very promising. I tried ephiphany on that same image, but it wou...
by lingon
Fri Sep 11, 2015 4:25 am
Forum: General discussion
Topic: minecraft on RasPi2
Replies: 3
Views: 1277

Re: minecraft on RasPi2

It can be made to run currently, but the performance is not good. You can have a look on this thread:
viewtopic.php?p=787240#p787240
It will be interesting to see what the OpenGL driver performance ends up to be when it matures and gets optimized.
by lingon
Tue Sep 08, 2015 4:29 pm
Forum: General discussion
Topic: WOT ? No official display thread ?
Replies: 18
Views: 4676

Re: WOT ? No official display thread ?

fruit-uk wrote:Looks good, order placed too.

What's Gordon going to do in his spare time now?
Well, there is the 10" screen to work on that might arrive sometime in the future, see this video at 4 min 31 s https://www.youtube.com/watch?v=k7byf2h_bT8 :)
by lingon
Fri Sep 04, 2015 5:56 pm
Forum: General discussion
Topic: Small HDMI-displays
Replies: 1
Views: 913

Small HDMI-displays

As there is no sign of the DSI-display I have been looking for small HDMI screens to be used with a Raspberry Pi. These are the ones I'm currently aware of: 7", 1024x600 http://www.neosecsolutions.com//products.php?61&cPath=21 9", 1280x800 HDMIPi http://hdmipi.com/ 7"-15" 1920x1080 http://www.beetro...
by lingon
Mon Apr 06, 2015 6:30 pm
Forum: Troubleshooting
Topic: RPi freezes in about a week. Please HELP
Replies: 26
Views: 9791

Re: RPi freezes in about a week. Please HELP

Do you have your Raspberry Pi in a case? Does the case have adequate perforations on the top to allow sufficient air to flow? The USB-Eternet chip has a lower temperature limit than the CPU, and it actually runs hotter then the CPU. I have seen lockups on my idling Raspis (overclocked) on a timescal...
by lingon
Fri Feb 13, 2015 8:20 pm
Forum: General discussion
Topic: The Raspberry Pi 2 Q&A thread
Replies: 442
Views: 128993

Re: The Raspberry Pi 2 Q&A thread

It would be nice with a complete list of changes between the BCM2835 and BCM2836. Are there other changes than the following? * CPU address space increased from 512 MB to 1 GB * 700 MHz ARMv6 core -> quad 900 MHz ARMv7 cores * new 512 kB L2 ARMv7 cache * hardware counter for the USB FIQ interrupts W...

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