Good news for the Raspberry Pi 4 (opens in new tab) (or all-in-one 400 (opens in new tab)) Large screen owners are submitted in the form of pull requests for Linux kernel 6.2. phonics (opens in new tab)Updated drivers for the Pi’s Broadcom GPU in the kernel may make it easier to use 60Hz framerates at 4K.
Now, thanks to the dual micro HDMI ports, the Pi 4 can be connected to a pair of 4K monitors, displaying Debian-based desktops nicely at 30Hz refresh rates. For some this is not enough. There is an option to boost the output of one of the ports (the one closest to the USB-C power input socket) to 60Hz. To do this, you’ll need to edit the config.txt file from a terminal window and select it in the screen configuration utility. It’s a hassle, but it’s a perfect match for the Raspberry Pi. (opens in new tab) ethos.
Version 6.2 of the Linux kernel seems to be about to change all that.For a while I was able to use the unofficial patch (opens in new tab) We managed to drive both ports at 60Hz, but official support missed the merge window for kernel 5.15, and we had regressions from 5.18, making things even worse.
The new code in kernel 6.2 doesn’t just unlock higher refresh rates. To use it, you need a monitor and an HDMI cable that can transmit and display the signal. The HDMI detection code has been reworked to allow automatic configuration if the entire chain is compliant.
pull request (opens in new tab)This is from Maxime Ripard, the brains behind the previous patch, which also includes changes to prevent VC4 clock speeds from getting too high, and updates the GPU’s firmware drivers.
No news yet about when the Raspberry Pi OS will get a kernel update. It’s also not clear if this update will unlock his 60Hz 4K on both of the Pi 4’s micro HDMI ports. It simplifies the process of connecting to a 4K monitor to get higher frame rates, with fewer trips to the configuration utility. The Raspberry Pi 4 can get a little hot during use, and it’s perfectly possible to use it without a heatsink at the moment, but it remains to be seen what effect these changes will have on the small computer’s thermal envelope. not. Now the GPU is working harder.