The cmdline.txt options in the linked topic will only rotate the console terminal, not the entire display. To rotate also EmulationStation's screen or the emulator video output, you need additional configurations - some details are in this topic.

@sleve_mcdichael something something gift horse in the mouth :)

@sdkyaker what do you mean "it does not allow you"?

can you please supply your /boot/config.txt file including the change that doesn't work?

also tell us what display you're using (model, manufacturer, etc)

@jamrom2 Definitely. When the cable company upgraded to the 'slide' version, I played with it endlessly.slide box

I'd advise you to use the official RetroPie image when installing RetroPie and not some 3rd party image.

@goalieadam said in Display error, can't launch games:

Not sure how to mark as resolved but this has fixed it.

Edit the topic title (by editing your first post) and append/prepend [Solved].

Did, by any chance, use rpi-update on your system ? What kernel version does your system have (run uname -a to find out ) ?

@GreenHawk84 yeah that should work

@mitu I dont think so

Okay, so now I'm getting blanking AND random "No Signal" to the TV. The no signal issue recovers when I exit the game. Could it be my seven dollar HDMI cable?

@mitu of course
Sorry

Sorry, I actually forgot I posted that, my bad!

The TV supports 1080, but I found the solution by hot swapping the unit after booting with the computer monitor. This boot up set the output to the monitors resolution. Once attached to the Television I had a clear and steady picture. Using the video set-up in the Retropie menu I set it up to use the monitors default resolution. I then shut down and rebooted, and the system loaded to the retropie config I had just corrected. Going back into the Retropie menu's video set-up, I was now given the option to change the resolution to television, progressive, at 720, which is where I wanted this to run to allow for portability. I saved and rebooted and the system loaded on the next try. Four reboots later the system is still easily displayed.

@ss3000

Try setting the overscan in /boot/config.txt using:

overscan_left= overscan_right=

Edit: Of course if that works, you may have to reconfigure your RetroArch display settings to accomodate.

OK I don't know if this is the best way of doing this but it seems to be working. The new config files were saving to configs/all/retroarch/config. The retroarch file being looked at is in gba/retroarch.cfg. I simply copied the content of the new config file and overwrote the content in retroarch.cfg with the new data. I kept back ups of the original files in case anything goes haywire. So far it seems to be just fine. Thanks.