Hello,
I just noticed that my a10s board with the Olimex debian image was running at a load of 1 while idling:
root@A10s:~# top
top - 18:48:33 up 1:26, 1 user, load average: 1,00, 1,01, 0,99
Tasks: 48 total, 1 running, 47 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0,0 us, 0,7 sy, 0,0 ni, 99,3 id, 0,0 wa, 0,0 hi, 0,0 si, 0,0 st
KiB Mem: 331392 total, 119752 used, 211640 free, 15896 buffers
KiB Swap: 0 total, 0 used, 0 free, 86252 cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1801 root 20 0 8692 2888 2244 S 0,3 0,9 0:10.06 sshd
2196 root 20 0 4220 1264 880 R 0,3 0,4 0:15.99 top
1 root 20 0 1684 624 520 S 0,0 0,2 0:02.49 init
2 root 20 0 0 0 0 S 0,0 0,0 0:00.00 kthreadd
3 root 20 0 0 0 0 S 0,0 0,0 0:00.00 ksoftirqd/0
4 root 20 0 0 0 0 S 0,0 0,0 0:00.00 kworker/0:0
5 root 20 0 0 0 0 S 0,0 0,0 0:00.25 kworker/u:0
6 root 0 -20 0 0 0 S 0,0 0,0 0:00.00 cpuset
7 root 0 -20 0 0 0 S 0,0 0,0 0:00.00 khelper
8 root 20 0 0 0 0 S 0,0 0,0 0:00.00 kdevtmpfs
9 root 0 -20 0 0 0 S 0,0 0,0 0:00.00 netns
10 root 20 0 0 0 0 S 0,0 0,0 0:00.01 sync_supers
11 root 20 0 0 0 0 S 0,0 0,0 0:00.00 bdi-default
12 root 0 -20 0 0 0 S 0,0 0,0 0:00.00 kintegrityd
13 root 0 -20 0 0 0 S 0,0 0,0 0:00.00 kblockd
14 root 20 0 0 0 0 S 0,0 0,0 0:00.00 khubd
15 root 20 0 0 0 0 S 0,0 0,0 0:02.35 kworker/0:1
16 root 0 -20 0 0 0 S 0,0 0,0 0:00.00 cfg80211
17 root 20 0 0 0 0 D 0,0 0,0 0:00.84 usb-hardware-sc
18 root 0 -20 0 0 0 S 0,0 0,0 0:00.00 rpciod
19 root 20 0 0 0 0 S 0,0 0,0 0:00.00 khungtaskd
I saw that the a20 had this problem too.
Here is a quick how to fix this yourself:
git clone git://github.com/linux-sunxi/sunxi-tools.git
cd sunxi-tools/
make fex2bin
Then retrieve the original script_a10_lime_HDMI.fex from your sdcard and copy it.
vi script_a10_lime_HDMI.fex
I use this setup on the buggy USB port (thanks to Xfer) :
[usbc0]
usb_used = 1
usb_port_type = 1
usb_detect_type = 0
usb_id_gpio = port:PH04
usb_det_vbus_gpio = port:PH05
usb_drv_vbus_gpio = port:PB09
usb_host_init_state = 1
usb_restric_flag = 0
"which keeps the low load (low ksoftirq cpu usage) AND keeps OTG port (mini-USB) working both with USB 1.1 and with USB 2.0 devices, if only in Host mode (which is the most useful anyway)." Xfer
Then you convert it back to script bin.
./fex2bin -v script_a10_lime_HDMI.fex script.bin
And you copy it back to the root of your sdcard.
This should be the default until an official fix is found imho.