I made a custom build with the latest kernel, it won’t reboot, seems hanging somewhere. Rebuilt kernel, rebuilt rootfs, rebuilt u-boot, multiple times, the same problem.
Use my old build with 4.4.154-78, was able to reboot in seconds. Upgraded to 4.4.154-81, hanged when rebooting.
Tried reboot, shutdown -r now, init 6, all the same, screen went dark but never came back, had to recycle the power.
Something changed in between -78 and -81 cause the issue. I’d wait for your answer before finishing my custom build.
The suspicious checkins:
adjust sdio clock frequency to avoid sdio write error for rockpi4
arm64: rockchip_linux_defconfig: add can drivers module
@Stephen I proved it, the first checkin caused the problem.
I swapped out the device tree in extlinux.conf, using kernel 81 with device tree 78, the system rebooted.
Without the change, kernel takes longer time to go down (I guess it’s busy to logging the writing errors), but it DOES come back.
I don’t know the capability of the chip, but SDIO runs at 200MHz with 4 bits width sounds a little too much (Raspberry Pi SDIO runs at 25MHz with 1 bit width)
EDIT:
I see, the settings are compliant to SDR104 (208MHz/4 bit bus), but even my SanDisk Extreme Pro (170MB/s read, 90MB/s write A2) has issue, I don’t think it would work with other cards in the market.
The 4 cards I’ve tested (PNY is a slow card I purchased for testing):
Now I’m curious how could get sdr104 working in Debian, since Armbian has enabled it, I’ll give the solution a shot anyway, as long as it reboots, even if it downgrads unless a cold restart, it’s still better.
