I've tested my OPi3 for best voltage numbers (for resolving stability problem after first patch), using StabilityTester and increasing slowly mV by 10 after every crash. Finaly, this values gives no error by running StabilityTester 100 times.
- change console welcome text
- changed display manager to lightdm by default and remove nodm completly
- desktop login manager enabled by default, toogle can be done with armbian-config
- added URL to the build script and commit hash to /etc/armbian-release file
- added debconf-utils,html2text,mmc-utils,sunxi-tools to the base and additional pkg list
- added synaptic package manager and onboard keyboard to the desktop base
- changed motd console welcome text to: Welcome to Debian Stretch with Armbian Linux 5.1.6-sunxi
- added "logout" to the panel/menu
- added normal users to additional groups: disk tty users games
* Adjust tabs and alter displaying build options at the end - hide empty ones
* Fix wrong MOTD message, adjust logic to autologin by default and request login for both notebooks
* Making fs cache naming more intuitive, rename script
* Move additional kernel drivers into separate file. Add AUFS for K5.1 this way, attach wireguard sources to last known working tag. master is broken atm
* Add two more extra wireless drivers 88x2BU, (improved) 8811EU and introduce switch EXTRAWIFI which is enabled by default
* Move 8812AU to the same version we have now. More recent has some performance issues in AP mode. Adjust configuration, add mvebut-dev 5.1.y kernel
* Enable Wireguard also on 3.10.y since it was fixed upstream. Attach bach to master branch since its working now
* Rockchip64 & RK3399 - upstream patches and remove deprecated patches, mvebu64 add DEV kernel attached to 5.1.y
* Enable BT on Tinkerboard CLI images as well
* cubox-i move to 5.1.y and enable missing HDMI
* Bugfixes for adding wireless driver to Kconfig. Adjusted RK3399 kernel due to upstream changes at FriendlyARM - does not boot yet. Changes has to be extract from their commits. Removed patches with RTL8188EU since we add more recent driver with a new precedure. Small fixes mvebu-default, udoo-next, s56818-next, ... remove deprecated patches.
* Boot-able RK3399-default config, add upstream patches for K4.4.y mvebu-default/udoo-next
* Adjust overclocking patch to meet upstream changes
* Odroid XU4 - remove deprecated kernel patches
new values are based on stabilityTester results
when using 930mV for 1.6GHz and 980mV for 1.8GHz, xhpl failed randomly.
So 930/980mV are the critical operation voltage.Then increase 10mV and
run 100 times test, result shows that xhpl (not always) failed 1~2 times.
It seems +10mV is still not enough to ensure dc-dc output voltage always
above operation voltage, that means the design of dc-dc converter is not
good enough that results in large ripple.
The testing script is "github.com/mzhboy/StabilityTester"
The following configuration have been tested.
1.08-1.32-1.48-1.64-1.8 GHz
900-910-920-930-990 *ok, 930 failed 2/100
900-900-910-940-990 *ok, 990 failed 1/100
890-900-910-940-990 *ok, 990 failed 1/100
880-880-910-940-1000 *ok, 940 failed 2/100
880-880-910-950-1000 *ok, 1000 failed 1/100
880-880-910-950-1010 *ok
use more powerfull 'cpuburn-a53' to do pressure test.
power meter shows that 'cpuburn-a53' consumes much more power than
'stress -c 4' in the same condition. 930mV is not enough when running
'cpuburn-a53' meanwhile 950mV is the minimum voltage.
When running 'cpuburn-a53' at 1.8G, h6 consumes lots of power and generate
such amount of heat that an active cooling is necessary otherwise h6
gets overheat and system crashes. Even with active cooling and heatsink
is in low temperature the junction temperature is still quit high that
it reaches about 88~90 ℃ . Maybe the high thermal resistance of plastic
package causes the problem.
* [sunxi-dev][h6]update orangepi lite2 dts file patch
* [sunxi-dev][h6]update patch for sun50i-h6.dtsi
* [sunxi-dev][h6] new operation voltage table of allwinner h6
The correct operation voltages are find out after many reboots and test (over 20+).
the original 1.16v@1.64/1.8GHz was too high since standard cell voltage
of 28nm@HPC is 0.9v, h6 got overheat very quickly over 110 Celsius and then system hangs,
a power-cycle off is needed to reset soc.
I use 'stress -c 4' to do pressure test, with a medium size passive heatsink on top of h6.
The pressure test proves that the soc has about 4 watt power consuming
that is much lesser than original 6~7.x watt when running at 1.8GHz(orangepi lite2 with
usb Ethernet rtl8153 and usb hub, wifi is connected but not used).
Soc runs much more stable and does not get overheat easily under heavy load
with new opp table.
* [sunxi-dev][h6] orangepi lite2 wifi fix
bcm43455-fmac is buggy, reset to bcm4329-fmac
