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by aBUGSworstnightmare
Wed Jul 17, 2019 9:18 am
Forum: General discussion
Topic: Pi4 - custom dual display configuration
Replies: 27
Views: 777

Re: Pi4 - custom dual display configuration

On the RPI3 I could operate two WXGA (1280*800) side by side. I'm assuming you mean Rpi3 with legacy drivers (I'm also running on a RPi3). That would have been using Xinerama and have had no hardware acceleration using the 3D hardware. Xinerama also has to do a load of extra work as objects get dra...
by aBUGSworstnightmare
Tue Jul 16, 2019 7:28 pm
Forum: Official Foundation Display
Topic: Screen for Raspberry Pi
Replies: 6
Views: 204

Re: Screen for Raspberry Pi

Ahhhh thank you guys! I'm sorry I was refering to the display one (not the HDMI one). So, if I were to remove the lcd screen from an iPad (for example), could I connect it to the rapsberry changing the boot file as you said? And that could work with any lcd screen? there is no simple way for connec...
by aBUGSworstnightmare
Tue Jul 16, 2019 7:16 pm
Forum: General discussion
Topic: Pi4 - custom dual display configuration
Replies: 27
Views: 777

Re: Pi4 - custom dual display configuration

Thanks for letting us know!

On the RPI3 I could operate two WXGA (1280*800) side by side.
Will test updated DPI24 overlay tomorrow (no time for doing it today).
by aBUGSworstnightmare
Tue Jul 16, 2019 2:47 pm
Forum: HATs and other add-ons
Topic: Cellular PI hat T-Mobile
Replies: 1
Views: 72

Re: Cellular PI hat T-Mobile

https://www.waveshare.com/gsm-gprs-gnss-hat.htm
or
https://www.waveshare.com/sim7000e-nb-iot-hat.htm

Check the mobile band to see if it's available in your part of the world.
by aBUGSworstnightmare
Tue Jul 16, 2019 2:13 pm
Forum: General discussion
Topic: just a thought... universal laptop style interface for Rpi
Replies: 6
Views: 193

Re: just a thought... universal laptop style interface for Rpi

Done alreday https://www.raspberrypi.org/forums/view ... d#p1361021

PCB size is 10x10cm; can even drive a second display if you have Bank0 GPIO free
by aBUGSworstnightmare
Tue Jul 16, 2019 12:03 pm
Forum: Device Tree
Topic: DPI displays - dpi24 overlay fails on RPi4
Replies: 13
Views: 322

Re: DPI displays - dpi24 overlay fails on RPi4

Will have to test later. Will answer here.
by aBUGSworstnightmare
Tue Jul 16, 2019 11:45 am
Forum: Device Tree
Topic: DPI displays - dpi24 overlay fails on RPi4
Replies: 13
Views: 322

Re: DPI displays - dpi24 overlay fails on RPi4

IMG_1007.JPG
trying dual display on a RPi3 fails
IMG_1007.JPG (95.84 KiB) Viewed 105 times
by aBUGSworstnightmare
Tue Jul 16, 2019 11:44 am
Forum: Device Tree
Topic: DPI displays - dpi24 overlay fails on RPi4
Replies: 13
Views: 322

Re: DPI displays - dpi24 overlay fails on RPi4

PhilE wrote:
Tue Jul 16, 2019 11:36 am
Read my post above.
Sorry PhilE, but when I made my post yours wasn't there! althought the timestamp says something different!

I will try it, but please let me know when the overlay was updated!
by aBUGSworstnightmare
Tue Jul 16, 2019 11:43 am
Forum: Device Tree
Topic: DPI displays - dpi24 overlay fails on RPi4
Replies: 13
Views: 322

Re: DPI displays - dpi24 overlay fails on RPi4

With the DPI interface configured I continued with the RPi4 testing but - as reported alreday on 1st July the displayed image is incorrect (look at the yellow dots in the background image). IMG_1011.JPG IMG_1012.JPG Now moving the uSD card to an RPI3 with the new driver enable ('dtoverlay=vc4-fkms-v...
by aBUGSworstnightmare
Tue Jul 16, 2019 11:30 am
Forum: Device Tree
Topic: DPI displays - dpi24 overlay fails on RPi4
Replies: 13
Views: 322

Re: DPI displays - dpi24 overlay fails on RPi4

PhilE wrote:And with the updated overlay?
Which updated overlay? I've downloaded Raspbian 2019-07-10 today and tested with it. I did not make any update/upgrade of the OS.

So, please let me know when the overlay was updated.
by aBUGSworstnightmare
Tue Jul 16, 2019 10:53 am
Forum: Device Tree
Topic: DPI displays - dpi24 overlay fails on RPi4
Replies: 13
Views: 322

Re: DPI displays - dpi24 overlay fails on RPi4

o.k. restarted testing today on this topic I've used a Manga screen 2 HDMI monitor (EDID.dat file attached to the post) and a Adafruit Kippah 5in WVGA display (connected to DPI). I've started with below config.txt on a RPi3 # Enable audio (loads snd_bcm2835) dtparam=audio=on disable_overscan=1 hdmi_...
by aBUGSworstnightmare
Tue Jul 16, 2019 7:42 am
Forum: General discussion
Topic: I didn't think the usb c power thing was a big deal...
Replies: 92
Views: 3844

Re: I didn't think the usb c power thing was a big deal...

Wouldn't call it a 'minor issue' if users have to pay nearly the same amount for a cable as for the official PSU... I would. Seriously, what's with all the whiners on the Pi4? :cry: :cry: :cry: When people had trouble powering the Pi3 with phone chargers and we suggested buying the official PSU, mo...
by aBUGSworstnightmare
Tue Jul 16, 2019 5:05 am
Forum: General discussion
Topic: I didn't think the usb c power thing was a big deal...
Replies: 92
Views: 3844

Re: I didn't think the usb c power thing was a big deal...

Here's an independent site talking about the USB_C issue, and how much of a problem it isn't. https://www.tomshardware.com/news/raspberry-pi-4-usb-c-cables-that-work,39869.html Cheapest 'known working' cable from that link is USD6.90 --> the cost of a 1GB Pi4 is no longer USD35, it's now starting f...
by aBUGSworstnightmare
Mon Jul 15, 2019 6:56 pm
Forum: General discussion
Topic: Pi4 - custom dual display configuration
Replies: 27
Views: 777

Re: Pi4 - custom dual display configuration

I know how to deal with custom timings and how to create EDID data, so I'm fine with both. I also have a EDID EEPROM on my board, but why should I bother myself with programming it if uisng the file fails to configure the driver correctly. Custom hdmi timings is what is documented here, there is not...
by aBUGSworstnightmare
Mon Jul 15, 2019 6:42 pm
Forum: General discussion
Topic: I didn't think the usb c power thing was a big deal...
Replies: 92
Views: 3844

Re: I didn't think the usb c power thing was a big deal...

The Wimbledon Centre Court coverage has been 2160p50 all tournament - some people might quite like to watch that on their Pi4B! Really? Did they succeed? I am not an expert, but that surely occurred on Pay-TV, didn't it? So the RPi should be able to decode# PayTV and render the [email protected]/60FPS.....
by aBUGSworstnightmare
Mon Jul 15, 2019 4:55 pm
Forum: General discussion
Topic: Pi4 - custom dual display configuration
Replies: 27
Views: 777

Re: Pi4 - custom dual display configuration

So, I would say the pottation of dual framebuffer support with legacy driver is incomplete! when I look at nano /usr/share/X11/xorg.conf.d/99-fbturbo.conf I only see below, but not what we've used in the testing (https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=216399&start=325#p1416171) # Th...
by aBUGSworstnightmare
Mon Jul 15, 2019 4:32 pm
Forum: General discussion
Topic: Pi4 - custom dual display configuration
Replies: 27
Views: 777

Re: Pi4 - custom dual display configuration

All the work done by James to expose multiple /dev/fbN nodes is merged and should be working. (By the sounds of it it is, as you can cat /dev/urandom to the framebuffer). Yes, two frame buffers are generated - I've never denied that (refer to my post above; there you can see display #0 and #2 are c...
by aBUGSworstnightmare
Mon Jul 15, 2019 12:11 pm
Forum: General discussion
Topic: Pi4 - custom dual display configuration
Replies: 27
Views: 777

Re: Pi4 - custom dual display configuration

But I would expect when using FKMS that the desktop would be extended over both displays. What does the screen configuration utility do? well, there is some desktop , but neither correct not extended entirely (!) over both displays. The screen configuration utility fails (as described in the post a...
by aBUGSworstnightmare
Mon Jul 15, 2019 12:04 pm
Forum: General discussion
Topic: When are people in the U.S. getting their Pi 4s?
Replies: 99
Views: 3247

Re: When are people in the U.S. getting their Pi 4s?

jamesh wrote:
Mon Jul 15, 2019 9:42 am
The fix for USB-C power cables will probably take a month or two or three to flush through the system - need to use up stocks of existing PCB's.
so there will be a hardware fix for this issue? Will the foundation grant FOC power supplies to those of use affected by this design flaw?
by aBUGSworstnightmare
Mon Jul 15, 2019 11:07 am
Forum: Beginners
Topic: max_framebuffers in config.txt
Replies: 5
Views: 119

Re: max_framebuffers in config.txt

framebuffer_width The framebuffer_width command specifies the console framebuffer width in pixels. The default is the display width minus the total horizontal overscan. framebuffer_height The framebuffer_height command specifies the console framebuffer height in pixels. The default is the display h...
by aBUGSworstnightmare
Mon Jul 15, 2019 10:43 am
Forum: General discussion
Topic: Pi4 - custom dual display configuration
Replies: 27
Views: 777

Re: Pi4 - custom dual display configuration

So, the frame buffer is working, but you do not have the desktop on it? This is not done by default on older devices (unlike pi4, where using FKMS means it all works out of the box). You will need to set up X to use multiple displays. This is described in the previous dual display thread, I'll try ...
by aBUGSworstnightmare
Mon Jul 15, 2019 10:23 am
Forum: General discussion
Topic: Pi4 - custom dual display configuration
Replies: 27
Views: 777

Re: Pi4 - custom dual display configuration

So the framebuffers are working correctly. What is not actually working? There is no display on the second framebuffer! Yes, I can write random data to it but that's of no particular use. To me it looks like the code from 'dual framebuffer testing' is either ported incomplete or no longer working. ...
by aBUGSworstnightmare
Mon Jul 15, 2019 9:23 am
Forum: Camera board
Topic: HDMI output with RPi-Cam-Web-Interface and Pikrellcam
Replies: 6
Views: 194

Re: HDMI output with RPi-Cam-Web-Interface and Pikrellcam

isn't a simple preview what you need? https://www.raspberrypi.org/documentation/raspbian/applications/camera.md Set camera resolution to FHD and configure HDMI output to FHD. --fullscreen, -f Fullscreen preview mode Forces the preview window to use the whole screen. Note that the aspect ratio of the...
by aBUGSworstnightmare
Sun Jul 14, 2019 5:46 pm
Forum: Troubleshooting
Topic: Stop Screen Dimming when Idle?
Replies: 2
Views: 52

Re: Stop Screen Dimming when Idle?

Which screen are you talking about?
by aBUGSworstnightmare
Sun Jul 14, 2019 12:32 pm
Forum: General discussion
Topic: Pi4 - custom dual display configuration
Replies: 27
Views: 777

Re: Pi4 - custom dual display configuration

jamesh wrote: If you do

Code: Select all

cat /dev/urandom > /dev/fb0 
cat /dev/urandom > /dev/fb1
do they both display something random?
Yes (did this test with FMKS disabled); screens are filled entirely with random data.

under FMKS 'cat /dev/urandom > /dev/fb0' fills both displays with random data (as expected)

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