Raspberry Pi Forums

All of a sudden my display size has been reduced. Is there supposed to be a listing in the menu Preferences>Monitor settings ?
I don't see one. I had everything setup in config.txt and didn't touch it. Why is there so much gibberish with the PI and monitors?
I really need to have it detect and display correctly. Using a PI2 would think they would have it figured out by now.

It's displaying wide screen but not filling the monitor like it WAS.

well obviously it has to do with overscan.

when are they going to get this so it gets it right? I disabled overscan and now I see I have to go in there and tweek the values. I'm working on a product using the PI and no user will be able to do this. -- again, sholud there be a preferences> monitor settings in the GUI ?

Is there a set of overscan values that will generally work well with any new monitor? Something I can put in there and users should be ok?

mmkw43 wrote:Is there a set of overscan values that will generally work well with any new monitor? Something I can put in there and users should be ok?

In the majority of cases disabling overscan completely seems to be the best option

mmkw43 wrote:Is there a set of overscan values that will generally work well with any new monitor? Something I can put in there and users should be ok?

Other than just disabling it, probably not. The amount a TV (or ocassionally a monitor) overscans varies quite widely between manufacturers, so there is no 'correct' value to compensate for it. That's why it's adjustable. The only way you'll get it spot-on for every display is to disable overscan on the Pi and include instructions for the end-user to make sure that overscan isn't enabled on the display. The same goes for any device driving a display with overscan enabled via HDMI or DVI-D. It's not a Pi-specific problem.

seems at least on the 2 monitors I've used with both a PI2 and a B model it has a tendency to overfill the screen? typical ?

My top bar with the menu is only half visible which is really the only problem -- I can move the desktop icons where I want.

That GUI preferences>monitor settings ? should it be there ? just curious.

It is possible to store multiple TV/monitor profiles in config.txt and have them auto-select if that's any help. The following pseudo-code shows how... Note: I have never tried this personally, only seen it suggested, so I can't vouch for how well it works.

GTR2Fan wrote: I have never tried this personally, only seen it suggested, so I can't vouch for how well it works.

Documented in https://www.raspberrypi.org/documentati ... fig-txt.md (section 'THE [EDID=*] FILTER')

Thank you.

# Global options go here
could you brief me on these? I know the first one forces hdmi but what's going on with group and mode?
and the mode "number"

thanks.


hdmi_force_hotplug=1

[EDID=ABC-DE1234]
# Options in here execute only if `tvservice -n` gives `device_name=ABC-DE1234`
hdmi_group=2
hdmi_mode=82

[EDID=ABC-HDMI]
# Options in here execute only if `device_name=ABC-HDMI`
disable_overscan=1
hdmi_group=2
hdmi_mode=87

It's all documented in the link DirkS kindly gave immediately below my previous post.

GTR2Fan wrote:It is possible to store multiple TV/monitor profiles in config.txt and have them auto-select if that's any help

Note: I have never tried this personally, only seen it suggested, so I can't vouch for how well it works.

It works. I use it on the Pi I do various development work on and can be connected to one of five different screens.
Based on the name the screen reports, it sets the overscan and video modes accordingly