I’ve tried the new VIM3_Ubuntu-server-focal_Linux-5.7-rc7_arm64_SD-USB_V0.9-2020, but it sees only 2GB of RAM:
total used free shared buff/cache available
Mem: 1968616 169204 1675080 3656 124332 1769144
It was not the case with focal-4.5 nor bionic-5.5.
Also, the official fan seem to work much less. I mean for the same high load it is mostly off, switching on only for a couple of seconds. Temperatures are around 80C. In the previous images focal-4.5 and bionic-5.5 the fan was on all the time during load, temperatures were better, around 55C.
I know, there is limited possibility of controlling the fan in mainline kernel compared to 4.5, but something is not right in the latest 5.7 kernel.
I’ve got VIM3 Pro, I have used 4GB RAM before. Now I see only 2GB. I’ll check the older Ubuntu image, because meanwhile I also flashed the latest Androind, maybe it is related.
I know, FAN is only in auto mode in the mainline kernel. It does not matter what you put in /boot/env.txt fan_mode=low, mid, high, auto
What I was saying is, that the auto mode of kernel 5.5 as well as auto mode of kernel 4.5 were much more efficient i.e. cooling more than the auto mode of the recent 5.7 kernel.
EDIT: The 2GB memory problem is related to VIM3_Pie_V200624, I tried older VIM3_Ubuntu-server-bionic_Linux-5.5-rc2_arm64_SD-USB_V0.8.2-20200103, but I still see only 2GB. Before the Android upgrade Bionic was showing 4GB. Interestingly, the Android 200624 itself shows 4GB RAM.
Keys Mode: does not work, I got a scrambled logo on the screen, but after restart Android was still in eMMC
Interrupt Mode: does not work, interrupted the USB-C flashing near 15%, but it didn’t boot again. It was somehow still in TST mode. I had to reflash again the older Android till the end. Also switching to Upgrade mode by Keys Mode does not work. I did TST.
CLI Mode: that could work, but I don’t know what is /dev/bootloader, with mainline kernel there are just /dev/mmcblk2, /dev/mmcblk2boot0, /dev/mmcblk2boot1, and /dev/mmcblk2rpmb.
Krescue: the latest Krescue is stuck when the logo is displayed. not sure, if it is related to the latest Android in eMMC
Holding power button works for booting Krescue. Then I erased eMMC (fast), but Ubuntu from SD card does not boot. White led blinks slowly, no HDMI output. It seems Android is really needed to boot Ubuntu from SD card.
Krescue on the other hand boots from SD card with erased eMMC without any button combination.
So I had to flash back the VIM3_Pie_V200319 into the eMMC.
As a conclusion VIM3_Pie_V200319 in eMMC with Ubuntu yields 4GB RAM, while latest VIM3_Pie_V200624 yields only 2GB.
Any thoughts on the fan behaviour? Maybe I’l try older dbt or older kernel 5.4.