popcornmix

So "With monitor after boot:" means the monitor was plugged in before boot? And this is a 1080p display (no 4kp30 support)?

The vc4_crtc_atomic_flush backtrace is known and harmless. See: https://github.com/raspberrypi/linux/issues/3020

Okay your issue may be something new. OP was using 3840x2160@30 which needs more than 250MHz pixel clock (and also core_freq) and I was able to reproduce that. 1080p60 only...

@ghollingworth @timg236 This firmware changed an usb_mdio_write. The value in the "good" firmware was unconditionally set to the value that is now set when in USB_MODE_DEVICE. Does this ring a...

@pelwell there was an rpi-update yesterday. Is there a newer fix? Is this gpu firmware or kernel?

Okay I'll try to remember when I get home. @P33M was also keen on pushing a firmware update for pwm audio improvements.

Sounds like [this issue](https://forum.libreelec.tv/thread/24415-le-10-beta-for-i4-force-hdmi-resolution/) which had a recent fix for fkms, but hasn't been fixed on kms.

@alanbork are you able to build and test this kernel? https://github.com/raspberrypi/linux/pull/5040

@alanbork it's in latest rpi-update kernel if you are still around.

> Other than using rpi-update and rebooting there is no way to switch back and forth between the new 480i and the version used before this update? No