Waveshare 7" Touchscreen LCD Issues

[CaelThunderwing]

i'm trying to enforce its only supported resolution mode, i know how to do this for emteriaOS not not sure how to enforce this across Emulators & Kodi in RetroPie what i have set in config.txt:

max_usb_current=1
hdmi_group=2
hdmi_mode=87
hdmi_cvt 800 480 60 6 0 0 0
hdmi_drive=1

i havent tested too many emulators but "Seems" ok for what i have tested but Kodi is giving me a headach turning teh screen all while on launch.

[juj]

This might be due to Kodi or some other launched software changing screen resolution at runtime. The hdmi_cvt setting only specifies the resolution to apply at boot time, but applications can change the resolution at runtime.

If you log on to the Pi via SSH to get to terminal (https://www.raspberrypi.org/documentation/remote-access/ssh/), you can run tvservice -s in the command prompt to see what the current resolution is. After boot with your config.txt it should be showing 800x480, so try to check what the resolution says after the display turns white.

The above is not a solution though, but just a way to try to diagnose if the resolution change might be the root cause. Perhaps Kodi might have a configuration file or option somewhere to make it keep the resolution fixed and not change it?

If the resolution does stay the same even after it turns white, then the root issue is something different.

[CaelThunderwing]

i think i see the problem and it might just be the refreshrates, when in emulationstation after boot,

but hitting a button before kodi loads,

Sorry for the larger second image, took it w/ my phone. so the problem might be its setting an invalid 30hz refreshrate that this display cannot handle.

ok, somethinsg dodgy... on loading Kodi, i'm whitescreen as per usual, But putty shows still

and it recovers after awhile, but the moment i press a button. pfft! Whitescreen.

Edit:
ok lastnight which i forgot to post before passin out.. Reicast had teh same problem but it was setting an independent Render resolution, which was fixed by editing the emu.cfg this has me thinking either Kodi's setting a bad pixelclock/setting an independent resolution which the force options in config.txt dont do didly Squat.