Can no longer select video mode after update

quicksilver

Pi 4 running official retropie 4.5.11. I updated the retropie setup script and then updated runcommand to make sure I was getting the recent commit titled "runcommand: fix rare default kms mode detection problem" However, now I am unable to select any video modes for any emulator. When I try to select a video mode a message pops up quickly at the bottom that says

sed: -e expression #1, char 93: undetermined `s' command
awk: run time error: negative field index $-1
FILENAME='-' FNR=1 NR=1
awk: run time error: negative value assigned to NF
FILENAME='-' FNR=1 NR=1

My apologies if I am jumping the gun in reporting this but I would rather be safe then sorry. If this is a known issue or something work in progress then please disregard.

mitu

Can you run

/opt/retropie/supplementary/mesa-drm/modetest -r

and post the output on pastebin.com ?

quicksilver

@mitu https://pastebin.com/jHCYK8sC

psyke83

@quicksilver

The issue should be resolved. Please update the RetroPie-Setup script and try again.

quicksilver

@psyke83 thanks it looks like it's working again. Something I've noticed in general though is that I have multiple listings for the same resolution/refresh rate. On previous pi models there were usually just the different CEA modes listed. Is this difference because of the different drivers/hardware that the pi 4 utilizes?

psyke83

@quicksilver said in Can no longer select video mode after update:

@psyke83 thanks it looks like it's working again. Something I've noticed in general though is that I have multiple listings for the same resolution/refresh rate. On previous pi models there were usually just the different CEA modes listed. Is this difference because of the different drivers/hardware that the pi 4 utilizes?

Yes, we query the available modes via the kernel modesetting API, which doesn't distinguish between CEA or DMT modes. If you look carefully at the duplicates in your list, however, you'll see that there are differences beyond the resolution and refresh rate, such as the aspect ratio encoding, horizontal/vertical sync polarity, etc.

Technically it's still possible to use tvservice for querying and changing modes on RPI4, but if you do change the mode, the underlying KMS framebuffer subsystem will not be aware of the change. This would mean that your monitor would be set to the correct mode, but the applications themselves would detect the framebuffer/refresh to still be set to the original resolution and thus show a cropped image, etc.