(ARCHIVED) Ubuntu Xenial Image (BSP Kernel)

[patrickhwood]

just booted my p64  with the 'disp.screen0_output_mode=EDID'  cmd line/

on my DELL U2410, i get no video by default.    by using that cmdline flag, i get working video. :-)

(this doesn't help my little 7" screen, though - it's not supporting the resolution, i'm sure)

Pardon my linux ignorance, but would you mind sharing how you added this flag?  I tried to modify the /proc/cmdline file, but I cannot.  I then created a /root/cmdline file with the appropriate content, and tried to use a bind mount, but that change didn't persist after a reboot.

Thanks

The contents of /proc/cmdline are read-only and come from the actual arguments passed to the kernel by the boot loader. To change the kernel arguments, you have to change a file that's read by uboot off of the first partition on the SD card.  It should be in /boot/uEnv.txt; if /dev/mmcblk0p1 isn't mounted on /boot, you'll have to mount it first to get at uEnv.txt.

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Can you create one version linux underclocking A64 soc Mhz  for the server ?
you may know server is 24 hour to running can't for the long time  temperature is hot !

Why - if you want it to run slower just use sysfs to change the speed/governor to whatever you like.

Ok , Thank your teach i will look how to use sysfs

Code:

# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
interactive conservative ondemand userspace powersave performance 
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
interactive
# echo powersave > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
powersave
#

You can put shell code in /etc/rc.local (before the "exit 0") that will execute after the board boots.