Monitor resolution

[mmkw43]

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.

[mmkw43]

well obviously it has to do with overscan.

[mmkw43]

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 ?

[mmkw43]

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?

[DirkS]

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

[GTR2Fan]

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.

[mmkw43]

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.

[GTR2Fan]

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...

Code: Select all

# Global options go here
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

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

[DirkS]

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')

[GTR2Fan]

Thank you.

[mmkw43]

# 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

[GTR2Fan]

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

[rpdom]

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