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  1. Module dw-hdmi-cec is not enabled by default in legacy kernel for RK3399 chips. After enable this option in kernel, CEC starts working. # CONFIG_DRM_DW_HDMI_CEC is not set
  2. hi all, I am wondering if there's any reason that CEC is not built into legacy kernel for RK3399. In https://github.com/armbian/build/blob/master/config/kernel/linux-rk3399-legacy.config, module dw-hdmi-cec is not enabled. # CONFIG_DRM_DW_HDMI_CEC is not set If no special reason, I can make a PR for this. Thank you!
  3. The image name is: Armbian_20.08_Nanopct4_focal_current_5.7.15.img This issue only occurs occasionally for several times. Due to limitation of one day one post, I would like to report another potential bug: It seems CEC stops working after switching source. At the begining, it works. After switching to another source and switching back, CEC stops working. I can see only several kind of messages when the issue occurs, like active source, standby. The same TV works well with RPI. I also collected CEC trace from RPI (but with tool cec-client) as working example.
  4. Bug? HW: nanopc-t4 Image: Official 20.08 release (focal current) Issue: After boot, CPU usage of core 0 keeps high. It almost remains at 100%. PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 317 root -51 0 0 0 0 R 100.0 0.0 24:02.87 irq/58-ff940000 I saw the following dump in dmesg. [ 5.673878] systemd[1]: Detected architecture arm64. [ 33.762463] vbus_typec: disabling [ 65.270398] rcu: INFO: rcu_preempt self-detected stall on CPU [ 65.270420] rcu: 0-....: (15006 ticks this GP) idle=
  5. hi @balbes150, nanopc T4 freezes with the latest build 2020.08.21, Armbian_20.08_Arm-64_focal_current_5.7.16.img.xz . I can reproduce it by writing zeros to a USB2 HDD. The USB HDD works well on other systems. tty@arm-64:/storage/upload$ dd if=/dev/zero of=./test_io bs=1M status=progress 2585788416 bytes (2.6 GB, 2.4 GiB) copied, 122 s, 21.2 MB/spacket_write_wait: Connection to port 22: Broken pipe The same applies to USB3 HDD. tty# dd if=/dev/zero of=./test_io bs=1M status=progress 2681208832 bytes (2.7 GB, 2.5 GiB) copied, 53 s, 50.6 MB/spacket_write_wait: Connection