On 9/26/20 1:55 AM, Christian Hewitt wrote: > I am using an ARM SBC device with Amlogic S922X chip (Beelink > GS-King-X, an Android STB) to boot the Kodi mediacentre distro > LibreELEC (which I work on) although the issue is also reproducible > with Manjaro and Armbian on the same hardware, and with the GT-King > and GT-King Pro devices from the same vendor - all three devices are > using a common dtsi: > > https://github.com/chewitt/linux/blob/amlogic-5.9-integ/arch/arm64/boot/dts/amlogic/meson-g12b-gsking-x.dts > https://github.com/chewitt/linux/blob/amlogic-5.9-integ/arch/arm64/boot/dts/amlogic/meson-g12b-gtking-pro.dts > https://github.com/chewitt/linux/blob/amlogic-5.9-integ/arch/arm64/boot/dts/amlogic/meson-g12b-gtking.dts > https://github.com/chewitt/linux/blob/amlogic-5.9-integ/arch/arm64/boot/dts/amlogic/meson-g12b-w400.dtsi > > I have schematics for the devices, but can only share those privately > on request. > > For testing I am booting LibreELEC from SD card. The box has a 4TB > SATA drive internally connected with a USB > SATA bridge, see dmesg: > http://ix.io/2yLh and I connect a USB stick with a 4GB ISO file that I > copy to the internal SATA drive. Within 10-20 seconds of starting the > copy the box deadlocks needing a hard power cycle to recover. The > timing of the deadlock is variable but the device _always_ deadlocks. > Although I am using a simple copy use-case, there are similar reports > in Armbian forums performing tasks like installs/updates that involve > I/O loads. > > Following advice in the #linux-amlogic IRC channel I added > CONFIG_SOFTLOCKUP_DETECTOR and CONFIG_DETECT_HUNG_TASK and was able to > get output on the HDMI screen (it is not possible to connect to UART > pins without destroying the box case). If you advance the following > video frame by frame in VLC you can see the output: > > https://www.dropbox.com/s/klvcizim8cs5lze/lockup_clip.mov?dl=0 Try with this patch: https://lore.kernel.org/linux-block/20200925191902.543953-1-shakeelb@xxxxxxxxxx/ -- Jens Axboe
