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by kevinthefixer
Sun Jun 21, 2020 10:26 pm
Forum: Gentoo
Topic: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPi3B+ and RPi4B)
Replies: 511
Views: 136509

Good News and Bad News

Good news: I saw at least one mention of supporting USB-MSD booting on this (1.5.4) image but it seemed the heavy devs haven't the time, which I understand completely! I got it to work in exactly the same way I did the RPiOS-64, and using the same downloads. https://www.raspberrypi.org/forums/viewto...
by kevinthefixer
Tue Jun 09, 2020 2:47 am
Forum: General discussion
Topic: STICKY: Raspberry Pi OS (64 bit) beta test version feedback
Replies: 199
Views: 24720

Re: STICKY: Raspberry Pi OS (64 bit) beta test version feedback

Hello, is it possible to include the beta of Raspberry Pi OS 64 bits on Noobs to install and use it on SSD please. Ubuntu 20.04 on Noobs would also be very pleasant for the users that we are, while waiting a bios with a 100% functional boot on USB. Regards. All these things will probably happen-- w...
by kevinthefixer
Sun May 31, 2020 10:48 pm
Forum: General discussion
Topic: USB-MSD boot EEPROM first update - 2020-05-28
Replies: 234
Views: 23694

Re: USB-MSD boot EEPROM update - 2020-05-28

It appears knute already has the latest beta bootloader installed (1590650553):
Yup, apparently I missed that. So the question is, what is knute actually trying to fix? Is his Pi not booting from usb?
by kevinthefixer
Sun May 31, 2020 9:00 pm
Forum: General discussion
Topic: USB-MSD boot EEPROM first update - 2020-05-28
Replies: 234
Views: 23694

Re: USB-MSD boot EEPROM update - 2020-05-28

@knute:

None of the things you did are going to update your eeprom. In my post just prior to yours, do step 1 to update the eeprom to the 05/28 beta.
by kevinthefixer
Sun May 31, 2020 3:25 am
Forum: General discussion
Topic: USB-MSD boot EEPROM first update - 2020-05-28
Replies: 234
Views: 23694

Re: USB-MSD boot EEPROM update - 2020-05-28

Time to consolidate things a tad, I think. Here is the Reader's Digest version of what I did, successfully: 1) create a bootloader update rescue card with files from https://github.com/raspberrypi/rpi-eeprom/releases/download/v2020.05.28-137ad/rpi-boot-eeprom-recovery-2020-05-28-vl805-000137ad-BETA...
by kevinthefixer
Mon May 25, 2020 4:59 pm
Forum: General discussion
Topic: Raspberry Pi 4 USB mass storage beta (beta means it not ready yet, and not officially released!)
Replies: 282
Views: 74165

Re: Raspberry Pi 4 USB mass storage beta (beta means it not ready yet, and not officially released!)

This whole shebang happened in a very timely manner for me! I'd just purchased a new Pi4 with the goal of setting up an SSD-based system when I saw this. Beta or no, I just had to do it. A few observations: Test-booting from the same uSD card I'd just flashed and modified, put in a card-reader in a ...
by kevinthefixer
Thu May 07, 2020 2:06 am
Forum: Advanced users
Topic: Raspberry Pi 4 VL805 firmware release 0138a1
Replies: 19
Views: 5590

Re: Raspberry Pi 4 VL805 firmware release 0138a1

As detailed in this thread: https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=267331 , my Espotek Labrador o-scope now works fine after this update. However, I cannot use the 'scope, a keyboard, and a mouse all three at once when using the type-a usb ports. Any two work but the mouse drops out...
by kevinthefixer
Wed May 06, 2020 2:44 am
Forum: Troubleshooting
Topic: RPi4 won't run PC-based oscilloscopes, kernel bug?
Replies: 27
Views: 1591

Re: RPi4 won't run PC-based oscilloscopes, kernel bug?

2020-05-05-185610_1920x1080_scrot.png Hooray! Qualified, anyway. The Labrador seems to be working perfectly after updating the VLI firmware. Interestingly enough, rpi-eeprom-update now reports "current" as a higher version than "latest"! I do seem to have a problem, though, I cannot plug in both a ...
by kevinthefixer
Tue May 05, 2020 2:11 am
Forum: Troubleshooting
Topic: RPi4 won't run PC-based oscilloscopes, kernel bug?
Replies: 27
Views: 1591

Re: RPi4 won't run PC-based oscilloscopes, kernel bug?

No joy there. With or without the trailing dr_mode statement, I just get the same old "device not connected" error, even though "lsusb" sees it. I'm beginning to think this was not to be...
by kevinthefixer
Mon May 04, 2020 12:24 pm
Forum: Troubleshooting
Topic: RPi4 won't run PC-based oscilloscopes, kernel bug?
Replies: 27
Views: 1591

Re: RPi4 won't run PC-based oscilloscopes, kernel bug?

OK, I'll do that ASAP, probably this evening (gotta pay the piper today). I assume I still need "dr_mode=host" also? Thanks for the boost here!

--Kevin
by kevinthefixer
Sun May 03, 2020 8:44 pm
Forum: Troubleshooting
Topic: RPi4 won't run PC-based oscilloscopes, kernel bug?
Replies: 27
Views: 1591

Re: RPi4 won't run PC-based oscilloscopes, kernel bug?

This is what it looks like connected to an external signal generator:
Image
Note the spikes are now negative, probably because the generator puts out a large DC component.
by kevinthefixer
Sun May 03, 2020 8:14 pm
Forum: Troubleshooting
Topic: RPi4 won't run PC-based oscilloscopes, kernel bug?
Replies: 27
Views: 1591

Re: RPi4 won't run PC-based oscilloscopes, kernel bug?

sudo lsusb -v [sudo] password for kevin: Bus 003 Device 004: ID 03eb:ba94 Atmel Corp. Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x03eb Atmel Corp. idProduct 0xba94 bcdDevice 2.00 iManufacturer 1 EspoTek...
by kevinthefixer
Sun May 03, 2020 2:38 am
Forum: Advanced users
Topic: RPi 4 USB-C socket as host
Replies: 14
Views: 6013

Re: RPi 4 USB-C socket as host

Hi guys, I confess I'm over my head here in this thread. But I think it would be worth your while to look here: https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=267331 While you're getting mangled files, we are getting "spurious spikes" on our oscilloscopes. I can't help but think the two are...
by kevinthefixer
Sat May 02, 2020 1:33 am
Forum: Troubleshooting
Topic: RPi4 won't run PC-based oscilloscopes, kernel bug?
Replies: 27
Views: 1591

Re: RPi4 won't run PC-based oscilloscopes, kernel bug?

Well, I don't see the problem on my Pi3b+, using the same Labrador board. It's altogether too possible that the two simply aren't compatible. Maybe the Pi4 lacks a filter on the usb-c power line? At this point all I can do is guess. And since I now have my Hantek 6022BL up and running on the Pi4 I'm...
by kevinthefixer
Fri May 01, 2020 9:34 pm
Forum: Troubleshooting
Topic: RPi4 won't run PC-based oscilloscopes, kernel bug?
Replies: 27
Views: 1591

Re: RPi4 won't run PC-based oscilloscopes, kernel bug?

Yes, mine is also v1.1. I still have the spurious spikes, as I like to call them, running on battery. Mine are somewhat different from yours, though; most seem random, but I have one every 4ms. This of course plays hell if you try to set a trigger. I don't have any experience with 'scopes and digita...
by kevinthefixer
Sun Apr 26, 2020 10:05 pm
Forum: Troubleshooting
Topic: RPi4 won't run PC-based oscilloscopes, kernel bug?
Replies: 27
Views: 1591

Re: RPi4 won't run PC-based oscilloscopes, kernel bug?

Yay, it works! After thinking of how we used to power the 1st-gen Pi with a cheap USB hub, not one with extra circuits for switching or overload protection, I thought I'd try this with a USB-C hub with a USB-C power delivery port, just hook the power to the "delivery" port. All plug-and-play and it ...
by kevinthefixer
Sun Apr 19, 2020 4:40 pm
Forum: Troubleshooting
Topic: RPi4 won't run PC-based oscilloscopes, kernel bug?
Replies: 27
Views: 1591

Re: RPi4 won't run PC-based oscilloscopes, kernel bug?

Wow! I was just asking for a direction to look, and here you guys went and discovered the fountain of youth for me! Well, almost. My power situation will be a bit more complicated as my GPIO pins are taken up already by a case fan but I'll find some workaround for that. Thanks guys! I'll send a link...
by kevinthefixer
Sat Apr 18, 2020 11:52 pm
Forum: Troubleshooting
Topic: RPi4 won't run PC-based oscilloscopes, kernel bug?
Replies: 27
Views: 1591

Re: RPi4 won't run PC-based oscilloscopes, kernel bug?

Certainly worth investigating, thanks for the input! Any idea where I might look into forcing host mode?
by kevinthefixer
Sat Apr 18, 2020 11:02 pm
Forum: Troubleshooting
Topic: RPi4 won't run PC-based oscilloscopes, kernel bug?
Replies: 27
Views: 1591

Re: RPi4 won't run PC-based oscilloscopes, kernel bug?

If you mean preferences as to range of the display, no, sorry I don't. AFAIK the GUI always opens to the same settings.

Reckon I need to check all my services and interfaces on my Pi4 to see if disabling them will allow the Labrador to work on it.
by kevinthefixer
Sat Apr 18, 2020 5:59 pm
Forum: Troubleshooting
Topic: RPi4 won't run PC-based oscilloscopes, kernel bug?
Replies: 27
Views: 1591

Re: RPi4 won't run PC-based oscilloscopes, kernel bug?

I've never fooled with VNC, but I always have wi-fi going. Do you have any other unusual servers or such running? Special services?
by kevinthefixer
Sat Apr 18, 2020 1:46 am
Forum: Troubleshooting
Topic: RPi4 won't run PC-based oscilloscopes, kernel bug?
Replies: 27
Views: 1591

Re: RPi4 won't run PC-based oscilloscopes, kernel bug?

Yes, my Pi3B+ is running up2date Raspian Buster, and the Lab runs well on it. It has occasional hiccups, lags a bit sometimes like it needed a half-minute to catch its breath or something like that, but it's a useful tool rather than a quirky experiment. Do you perhaps have another USB device compet...
by kevinthefixer
Sun Mar 08, 2020 12:15 am
Forum: Troubleshooting
Topic: RPi4 won't run PC-based oscilloscopes, kernel bug?
Replies: 27
Views: 1591

RPi4 won't run PC-based oscilloscopes, kernel bug?

Neither my Espotek Labrador board nor my Hantek 6022BL work on my up-to-date RPi4 (4GBRAM). The Labrador, at least, works fine on my 3B+. I have this from Chris Esposito of Espotek: There is a known bug in the Linux kernel on the Raspberry Pi 4 that prevents Isochronous 12 Mbit/s devices that reques...
by kevinthefixer
Mon Aug 19, 2019 12:19 am
Forum: Other projects
Topic: PiTab: Yet another Raspberry Pi tablet
Replies: 1
Views: 1161

Re: PiTab: Yet another Raspberry Pi tablet

Updates 2019/08/18: Installed Raspian Buster. I'm a believer in fresh installs, there are never any upgrade issues. Yes, it's a bit more work, I think it''s worth it. My PCs are going to stay on Stretch for a good long while, though, I haven't run into any problem yet on Stretch that I can't solve i...
by kevinthefixer
Wed Jun 19, 2019 2:26 am
Forum: Other projects
Topic: PiTab: Yet another Raspberry Pi tablet
Replies: 1
Views: 1161

PiTab: Yet another Raspberry Pi tablet

Credit to Michael Castor and his PiPad, without which I would have never been inspired to this. And to Liz for her writeup: https://www.raspberrypi.org/blog/wooden-tablet-michael-castors-pipad/ Now I know it's been done, and there is even a kit complete with case and battery which would be the easie...
by kevinthefixer
Sat Apr 06, 2019 3:23 am
Forum: Raspberry Pi Desktop for PC and Mac
Topic: How to set screen brightness using existing buttons?
Replies: 2
Views: 419

Re: How to set screen brightness using existing buttons?

Might try searching Synaptic for "dell" or whatever make you might have. I have installed some utilities I found that way on my Dell Latitude E4300, forget the names right now, but the factory fn-arrow-up and fn-arrow-down control the brightness just like it's supposed to. However, it's running 64-b...

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