screen stay black after long time(>2h) sleep

[usstlf]

screen stay black after long time(>2h) sleep, through vnc the device can still be accessed.
still used 5.10, because rebuild of 5.15 not success.

[usstlf]

[ 7.241057] input: Goodix Capacitive TouchScreen as /devices/platform/soc/fe205c00.i2c/i2c-6/6-005d/input/input1
[ 7.336800] ili9881c-dsi fe700000.dsi.0: supply power not found, using dummy regulator
[ 7.338503] checking generic (3ea8b000 12c000) vs hw (0 ffffffffffffffff)
perhaps because of the dummy regulator is used.

[penk]

5.15 requires a fix in driver, you can:

1. use dkms cutiepi-io/pi-gen_stage4.5-cutiepi@c5ad8c3
2. apply patch manually ILI9881 panel fixes raspberrypi/linux#4969
3. sudo rpi-update to get 5.15.32 which has the fix

[usstlf]

I will try the 5.15 again. But this error happened by 5.10. The screen runs well with 5.10. But if the screen is slept for a while(more than 2 hours), it could not wake up again. but through vnc I can still access the device.