q4a Posted December 15, 2020 Share Posted December 15, 2020 I got wierd screen blinking after update kernel from 5.8.18-rockchip to 5.9.14-rockchip. Here is blurry video with screen blinking. My screen resolution is 1600x900 and i'm using HDMI-to-VGA adapter. All was working fine with kernel 5.8.18-rockchip. I still can connect to sbc via ssh, so I checked kernel version, install old one and blinking gone: q@tinkerboard:/var/cache/apt/archives$ uname -a Linux tinkerboard 5.9.14-rockchip #20.11.3 SMP PREEMPT Fri Dec 11 22:00:29 CET 2020 armv7l armv7l armv7l GNU/Linux q@tinkerboard:/var/cache/apt/archives$ dpkg-deb -I linux-image-current-rockchip_20.11_armhf.deb new Debian package, version 2.0. size 27169880 bytes: control archive=50048 bytes. 403 bytes, 12 lines control 194536 bytes, 1942 lines md5sums 428 bytes, 15 lines * postinst #!/bin/bash 299 bytes, 12 lines * postrm #!/bin/bash 932 bytes, 34 lines * preinst #!/bin/bash 297 bytes, 12 lines * prerm #!/bin/bash Package: linux-image-current-rockchip Source: linux-5.8.18-rockchip Version: 20.11 Architecture: armhf Maintainer: Igor Pecovnik <igor.pecovnik@****l.com> Installed-Size: 80090 Section: kernel Priority: optional Homepage: http://www.kernel.org/ Description: Linux kernel, version 5.8.18-rockchip This package contains the Linux kernel, modules and corresponding other files, version: 5.8.18-rockchip. q@tinkerboard:/var/cache/apt/archives$ sudo dpkg -i linux-image-current-rockchip_20.11_armhf.deb dpkg: warning: downgrading linux-image-current-rockchip from 20.11.3 to 20.11 (Reading database ... 112356 files and directories currently installed.) Preparing to unpack linux-image-current-rockchip_20.11_armhf.deb ... update-initramfs: Deleting /boot/initrd.img-5.9.14-rockchip Removing obsolete file uInitrd-5.9.14-rockchip Unpacking linux-image-current-rockchip (20.11) over (20.11.3) ... Setting up linux-image-current-rockchip (20.11) ... update-initramfs: Generating /boot/initrd.img-5.8.18-rockchip update-initramfs: Converting to u-boot format q@tinkerboard:/var/cache/apt/archives$ sudo reboot Please, fix blinking bug in 5.9.14-rockchip. Looks like problem raised when hdmi patches was disabled: https://github.com/armbian/build/commit/62c27823a637698e88284bc0c0f0d31342ed9641 0 Quote Link to comment Share on other sites More sharing options...
jock Posted December 15, 2020 Share Posted December 15, 2020 Hello, the HDMI timing patches have been disabled. They still compile fine, but for some reason made my very standard full-hd 60Hz monitor unable to work. Maybe something changed in kernel 5.9 (apparently could not find anything related though) that makes HDMI timing patches work bad. You may try and compile with the patches back on and see if your adapter works again. I have access to more equipment now and can do some more checks if you report that the patches are working good for you. 0 Quote Link to comment Share on other sites More sharing options...
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