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I am running Stretch on a Raspberry Pi 3 and have been trying to change my screen resolution (connected to some Samsung touchscreen via HDMI) via

sudo raspi-config

the menu loads properly and I can change the settings except when I try to change screen resolution at which point the whole OS stops working. Any ideas?

edit:

it doesn't allow me to go into the menu which shows the options of what resolution to choose.

edit2:

Its not that I want to change it to a particular resolution, its that if I try to open that menu in raspi-config, the whole OS crashes and I have to restart the Pi

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  • 1
    What power supply are you using?
    – CoderMike
    May 27, 2018 at 11:31
  • 5V 2A strongtonics. why? May 27, 2018 at 11:46
  • Change from what old value to what new value? Not all are possible, please add these details to your question.
    – Fabian
    May 27, 2018 at 13:30
  • Recommended psu is the official 5.1V 2.5A 18AWG cable psu - might be a power glitch when changing mode?
    – CoderMike
    May 27, 2018 at 15:23
  • would that prevent me from opening even the menu to try it out? Will try thanks! May 27, 2018 at 16:06

1 Answer 1

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I know this is an older question now, but I was having this exact same issue with my Raspberry Pi 3 B+.

I found out that the issue for me was caused by having GL Driver set to "Full KMS".

Once I set it to "Fake KMS" I stopped having freezing problems.

  1. In terminal type "sudo raspi-config"
  2. Go to "Advanced Options"
  3. Go to "GL Driver"
  4. Select "G2 GL (Fake KMS)"
  5. Reboot Pi

I hope this helps someone else with the same issue.

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  • thanks! Solution confirmed on my Pi 3B+. I could change the resolution after changing to [Fake KMS]. No more hangs!
    – Erik
    Oct 2, 2018 at 20:43
  • confirmed on PI 4B Jun 4, 2020 at 11:57
  • After step 4 “Select G2 GL (Fake KMS)”, I needed to immediately go back to Advanced Options > Resolution and select my preferred resolution, because restarting between reverted to the standard GL selection.
    – Bmd
    Jul 2, 2020 at 8:55
  • This fixed my issue that occurred whenever screen blanking happened. If the screen blanked due to no input, the entire device would hard lockup forcing a manual power cycle. Thank you! Jan 1, 2021 at 0:54

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