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STICKY: Official Touchscreen Display FAQ

Posted: Fri Sep 11, 2015 7:31 pm
by jarrah31
Can the display turn off after x minutes and then be reactivated by just touching the screen, both in command line and in startx?

Thanks.

Re: Official Touchscreen Display Questions

Posted: Fri Sep 11, 2015 11:02 pm
by billintad
I think you are supposed to use "Recommended peripherals", but a forum dedicated to "screens" might be a good idea as there have been many threads about that topic.

The desktop display (startx) does go blank after a period of no input . It is immediately refreshed by just touching the screen. I suppose there must be a parameter somewhere that controls the length of time spent waiting for input. I haven't looked.

I have not experienced screen blanking when the command line is being used, but I don't use the command line for any length of time. I will just leave it running for a while and see what happens.

Re: Official Touchscreen Display Questions

Posted: Sat Sep 12, 2015 6:34 am
by billintad
It would appear it does blank the screen when in command line mode, but I had to use the keyboard to refresh the screen. Touching the screen did not work.

Re: Official Touchscreen Display Questions

Posted: Sat Sep 12, 2015 10:44 am
by jarrah31
Thanks! I should have just left it running to see (though I did try to find screen saver options in the GUI first).

Re: Official Touchscreen Display Questions

Posted: Sat Sep 12, 2015 2:13 pm
by PrivacyEnhanced
Users have been complaining about X blanking for at least 15 years. Apparently nobody is listening.

Re: Official Touchscreen Display Questions

Posted: Sun Sep 13, 2015 7:26 pm
by PeterO
Do you have one of the new displays Dougie ?

PeterO

Re: Official Touchscreen Display Questions

Posted: Sun Sep 13, 2015 10:07 pm
by DougieLawson
PeterO wrote: Do you have one of the new displays Dougie ?
I'm still discussing it with SWMBO, the household finance director.

Re: Official Touchscreen Display Questions

Posted: Mon Sep 14, 2015 9:34 pm
by alexeames
DougieLawson wrote:
PeterO wrote: Do you have one of the new displays Dougie ?
I'm still discussing it with SWMBO, the household finance director.
You should get one. They're really nice :) Good price too.

Re: Official Touchscreen Display FAQ

Posted: Wed Sep 16, 2015 8:36 am
by IngoP
Hi.
after display has been installed my PiDAC+ won´t work any more.
No Audio Signal.

Would be there an issue by powersupply via GPIO ?

Re: Official Touchscreen Display FAQ

Posted: Thu Sep 17, 2015 7:53 am
by IngoP
Hi.
Yesterday evening I disconnected official 7 ´´ RPI Touchscreen from my PI2.
After that my DAC+ works as well as before.

In my opinion there is an issue with power supply of PI2, DAC+ and Screen.

My PI is powered by micro USB 5V 3A by a regulated power supply. Touchscreen and DAC+ was powerd by GPIO.
Current of PI and DAC+ has been 0,40 A - 0,49A. at connecting display current will rise to 0,91 A.

So there is a question to be diskussed :
Is it possible do power PI2 and DAC+ via micro USB and touchscreen via separate wires from power supply ?

Re: Official Touchscreen Display FAQ

Posted: Thu Sep 17, 2015 8:30 am
by gsh
Does the red LED on the Raspberry Pi go out? If so then the problem is the voltage to the Pi is dropping out.

Otherwise it is possible that the introduction of the screen is fouling the DAC I2C communications

Gordon

Re: Official Touchscreen Display FAQ

Posted: Thu Sep 17, 2015 8:54 am
by IngoP
Hi, no red LED is continuosly on.

what about your idea :
"...introduction of the screen is fouling the DAC I2C communications"

how could this be fixed?

Re: Official Touchscreen Display FAQ

Posted: Mon Sep 21, 2015 9:26 am
by meigrafd
Is there an ETA when the Documentation for the Display get published / updated ?

Spezial i mean the available config.txt Settings and the Hardware Details.

Thanx!

Re: Official Touchscreen Display FAQ

Posted: Mon Sep 21, 2015 10:55 am
by gsh
https://www.raspberrypi.org/documentati ... /Readme.md

Contains the first stab at information...

You can create github issues to ask for specific information items

Gordon

Re: Official Touchscreen Display FAQ

Posted: Mon Sep 21, 2015 11:41 am
by meigrafd
Basically I meant more specifically Details - e.g. all possible config.txt settings


But now im confused... In the Blog stands:

70 degree viewing angle

But in that official Readme.md stands:

140 degree viewing angle horizontal, 130 degree vertical

Whats now correct?

Re: Official Touchscreen Display FAQ

Posted: Mon Sep 21, 2015 1:10 pm
by gsh
It depends upon how you define viewing angle, the actual spec is

70 degree left
70 degree right
70 degree top
60 degree bottom

so total viewing angle is 140 horizontally, but 130 degrees vertically

Gordon

Re: Official Touchscreen Display FAQ

Posted: Mon Sep 21, 2015 2:03 pm
by meigrafd
Is that from before or after the latest Firmware-update?

Because after the Firmware was flipped upside down top and bottom angle is also flipped?

E.g.: Before:
70 degree top
60 degree bottom

Now:
60 degree top
70 degree bottom

:?:

Re: Official Touchscreen Display FAQ

Posted: Mon Sep 21, 2015 2:19 pm
by gsh
No that's why it was flipped!

Originally we had the display upside down, which made the top viewing angle only 60 degree...

Now with the display the correct way up it is 70 degree up 60 degree down

Re: Official Touchscreen Display FAQ

Posted: Mon Sep 21, 2015 10:21 pm
by meigrafd
Ah oke, Thanks :)

Another Question: Is it possible to display on both Video-Outputs the same Stuff , and with different Resolutions?

E.g.:
HDMI -> LXDE
DSI -> LXDE
both the same Screen?

Re: Official Touchscreen Display FAQ

Posted: Tue Sep 22, 2015 5:42 am
by gsh
Basically that would have to be done in X because it is the thing that draws in the windows and would therefore need to know about two different resolutions... And I'm fairly sure that X has no way of doing this!

It would actually be really hard no matter what system to had because you'd have to manipulate all coordinates and font sizes to draw the same thing at different resolutions!

Drawing everything at one resolution (800x480) and then rescaling to fit on the HDMI would work but work look terrible (plus there's currently no support for it)

Gordon

Re: Official Touchscreen Display FAQ

Posted: Tue Sep 22, 2015 9:52 am
by jorabo
How to switch off the backlight ? And what is this "INT" pin for ?

If I shut down the RPI2 with the Display connected, the backlight keeps switched on...
After some time it shows funny stripes, because there is no further control for the display. :roll:

Is there a possibility to switch of the backlight separate ?

Anybody here knows the function of this INT pin ?

PS: The Readme.md is not longer avail...... Is there any official doc for the display ?

Re: Official Touchscreen Display FAQ

Posted: Tue Sep 22, 2015 12:03 pm
by meigrafd
gsh wrote:Basically that would have to be done in X because it is the thing that draws in the windows and would therefore need to know about two different resolutions... And I'm fairly sure that X has no way of doing this!

It would actually be really hard no matter what system to had because you'd have to manipulate all coordinates and font sizes to draw the same thing at different resolutions!

Drawing everything at one resolution (800x480) and then rescaling to fit on the HDMI would work but work look terrible (plus there's currently no support for it)
Hm oke. And how would it be with XBMC on the DSI-Display and Video-Output over HDMI? By selecting the Movie over DSI-Display and playback comes over HDMI? ;)

Also i actually dont understand how i can switcch between both Outputs E.g. running mplayer over commandline


@ jorabo: For me the Readme is still available.
And also have a look here: viewtopic.php?p=816276#p816276

Re: Official Touchscreen Display FAQ

Posted: Tue Sep 22, 2015 4:30 pm
by gadgetoid
gsh wrote:https://www.raspberrypi.org/documentati ... /Readme.md

Contains the first stab at information...

You can create github issues to ask for specific information items

Gordon
Raised: https://github.com/raspberrypi/documentation/issues/255

I've even collated most, if not all, of the requested information: http://forums.pimoroni.com/t/official-7 ... en-faq/959

Re: Official Touchscreen Display FAQ

Posted: Sat Sep 26, 2015 6:57 pm
by Paul Webster
Raspberry Pi Swag store description has been updated to state that the old model B and A not currently supported - and lead time for shipment of the display from them is set to 6 weeks (for orders from September 18th).
It does not yet refer to the upside down issue with the frame (leading to sub-optimal viewing) but perhaps the lead time will be long enough for the folks at Pimoroni to work out a solution (they have said that they hope to get onto it soon).
http://swag.raspberrypi.org/collections ... en-display

Re: Official Touchscreen Display FAQ

Posted: Sat Oct 03, 2015 12:37 am
by weleavefossils
Upgraded to Jesse today and noticed that when I boot to UI with startx, the UI doesn't fill the whole screen and some menus don't allow me to view/select options that are too far to the bottom. I didn't noticed this before Jesse but I could be wrong.