@AlainW94 thank you Alain for your attempt anyways...now at least we know it isn't worth to bother anymore with such an issue.

@wdehoog Willem, I started looking around at the references you gave to me. According to an other post in this Forum, it seems the RGB leds are disabled on purpose; see here below the section of the kernel file leds-lp5562.c commented out for this reason:

static struct lp55xx_led_config lp5562_led_config[] = {
	/*{
		.name 		= "R",
		.chan_nr	= 0,
		.led_current	= 20,
		.max_current	= 40,
	},
	{
		.name 		= "G",
		.chan_nr	= 1,
		.led_current	= 20,
		.max_current	= 40,
	},
	{
		.name 		= "B",
		.chan_nr	= 2,
		.led_current	= 20,
		.max_current	= 40,
	},*/
	{
		.name 		= "m86_led",
		.chan_nr	= 0,
		.led_current	= 80,
		.max_current	= 80,
	},
};

I think this is the major culprit for not having any other colors but the white for the RGB led installed on the Meizu Pro5. My question is: how can I flash only this part of the kernel, prior modifying that code to see if it helps to solving that issue?

In regard to the dmesg log, may I ask you what's that for? Only to understand the purpose, generally speaking. I looked for /var/log directory and I found several archived dmesg files but a bit outdated I'd say. However, I'd copied the most up to date dmesg file and in the following link you can find the details: dmesg.log

Please, tell me if you need something else from me. Needless to say, I really appreciate what you are doing

@wdehoog hi Willem, thank you for the suggestions. I searched on the internet and what @UniSuperBox said before about only the white color to be natively available on the Meizu phones seems correct: at least one app does exist on Flyme/Android side able to unleash all the other colors for the Pro5 as well, so maybe also for UT a work-around could be eventually feasible somehow ---------> RGB led notification Flyme

Now, here below the check I made.

phablet@ubuntu-phablet:~$ sudo find /sys -name brightness -ls
     8459      0 -rw-rw----   1 system   system       4096 gen  9 09:06 /sys/devices/virtual/backlight/pwm-backlight.0/brightness
    15318      0 -rw-rw-rw-   1 root     root         4096 gen  9 09:06 /sys/devices/gpioi2c0.14/i2c-12/12-0030/leds/m86_led/brightness
    15238      0 -rw-r--r--   1 root     root         4096 gen  9 09:23 /sys/devices/gpioi2c1.15/i2c-13/13-0063/leds/flash0/brightness
    15252      0 -rw-r--r--   1 root     root         4096 gen  9 09:23 /sys/devices/gpioi2c1.15/i2c-13/13-0063/leds/flash1/brightness
    15266      0 -rw-r--r--   1 root     root         4096 gen  9 09:23 /sys/devices/gpioi2c1.15/i2c-13/13-0063/leds/torch0/brightness
    15280      0 -rw-r--r--   1 root     root         4096 gen  9 09:23 /sys/devices/gpioi2c1.15/i2c-13/13-0063/leds/torch1/brightness

I typed sudo bash -c "echo 1 > /sys/...../brightness" for all of the items listed above but apparently it didn't work; actually, the only consequence I've seen is when I got the usb cable connected powering up the phone with the notification light blinking, just after sending one of those commands the light suddenly disappeared.
The following is what I have got in each of the folders above listed:

phablet@ubuntu-phablet:~$ ls -l /sys/devices/virtual/backlight/pwm-backlight.0/
total 0
-r--r--r-- 1 root   root   4096 gen  9 09:35 actual_brightness
-rw-r--r-- 1 root   root   4096 gen  9 09:35 bl_power
-rw-rw---- 1 system system 4096 gen  9 09:30 brightness
-r--r--r-- 1 root   root   4096 gen  9 09:35 max_brightness
drwxr-xr-x 2 root   root      0 gen  9 09:06 power
lrwxrwxrwx 1 root   root      0 gen  9 09:06 subsystem -> ../../../../class/backlight
-r--r--r-- 1 root   root   4096 gen  9 09:35 type
-rw-r--r-- 1 root   root   4096 gen  9 09:05 uevent

phablet@ubuntu-phablet:~$ ls -l /sys/devices/gpioi2c0.14/i2c-12/12-0030/leds/m86_led/
total 0
-rw-rw-rw- 1 root root 4096 gen  9 09:24 brightness
lrwxrwxrwx 1 root root    0 gen  9 09:37 device -> ../../../12-0030
-rw-r--r-- 1 root root 4096 gen  9 09:37 led_current
-r--r--r-- 1 root root 4096 gen  9 09:37 max_brightness
-r--r--r-- 1 root root 4096 gen  9 09:37 max_current
drwxr-xr-x 2 root root    0 gen  9 09:06 power
lrwxrwxrwx 1 root root    0 gen  9 09:06 subsystem -> ../../../../../../class/leds
-rw-r--r-- 1 root root 4096 gen  9 09:37 trigger
-rw-r--r-- 1 root root 4096 gen  9 09:05 uevent

phablet@ubuntu-phablet:~$ ls -l /sys/devices/gpioi2c1.15/i2c-13/13-0063/leds/flash0/
total 0
-rw-r--r-- 1 root root 4096 gen  9 09:29 brightness
lrwxrwxrwx 1 root root    0 gen  9 09:37 device -> ../../../13-0063
-rw-r--r-- 1 root root 4096 gen  9 09:37 enable
-r--r--r-- 1 root root 4096 gen  9 09:37 max_brightness
-rw-r--r-- 1 root root 4096 gen  9 09:37 onoff
drwxr-xr-x 2 root root    0 gen  9 09:06 power
-rw-r--r-- 1 root root 4096 gen  9 09:37 source
lrwxrwxrwx 1 root root    0 gen  9 09:06 subsystem -> ../../../../../../class/leds
-rw-r--r-- 1 root root 4096 gen  9 09:37 timeout
-rw-r--r-- 1 root root 4096 gen  9 09:37 trigger
-rw-r--r-- 1 root root 4096 gen  9 09:05 uevent

phablet@ubuntu-phablet:~$ ls -l /sys/devices/gpioi2c1.15/i2c-13/13-0063/leds/flash1/
total 0
-rw-r--r-- 1 root root 4096 gen  9 09:29 brightness
lrwxrwxrwx 1 root root    0 gen  9 09:39 device -> ../../../13-0063
-rw-r--r-- 1 root root 4096 gen  9 09:39 enable
-r--r--r-- 1 root root 4096 gen  9 09:39 max_brightness
-rw-r--r-- 1 root root 4096 gen  9 09:39 onoff
drwxr-xr-x 2 root root    0 gen  9 09:06 power
lrwxrwxrwx 1 root root    0 gen  9 09:06 subsystem -> ../../../../../../class/leds
-rw-r--r-- 1 root root 4096 gen  9 09:39 trigger
-rw-r--r-- 1 root root 4096 gen  9 09:05 uevent

phablet@ubuntu-phablet:~$ ls -l /sys/devices/gpioi2c1.15/i2c-13/13-0063/leds/torch0/
total 0
-rw-r--r-- 1 root root 4096 gen  9 09:30 brightness
--w--w---- 1 root root 4096 gen  9 09:40 chip_reg
lrwxrwxrwx 1 root root    0 gen  9 09:40 device -> ../../../13-0063
-rw-r--r-- 1 root root 4096 gen  9 09:40 enable
--w--w---- 1 root root 4096 gen  9 09:40 hwen
-r--r--r-- 1 root root 4096 gen  9 09:40 max_brightness
-rw-r--r-- 1 root root 4096 gen  9 09:40 onoff
drwxr-xr-x 2 root root    0 gen  9 09:06 power
-rw-r--r-- 1 root root 4096 gen  9 09:40 source
lrwxrwxrwx 1 root root    0 gen  9 09:06 subsystem -> ../../../../../../class/leds
-rw-r--r-- 1 root root 4096 gen  9 09:40 trigger
-rw-r--r-- 1 root root 4096 gen  9 09:05 uevent

phablet@ubuntu-phablet:~$ ls -l /sys/devices/gpioi2c1.15/i2c-13/13-0063/leds/torch1/
total 0
-rw-r--r-- 1 root root 4096 gen  9 09:30 brightness
lrwxrwxrwx 1 root root    0 gen  9 09:40 device -> ../../../13-0063
-rw-r--r-- 1 root root 4096 gen  9 09:40 enable
-r--r--r-- 1 root root 4096 gen  9 09:40 max_brightness
-rw-r--r-- 1 root root 4096 gen  9 09:40 onoff
drwxr-xr-x 2 root root    0 gen  9 09:06 power
lrwxrwxrwx 1 root root    0 gen  9 09:06 subsystem -> ../../../../../../class/leds
-rw-r--r-- 1 root root 4096 gen  9 09:40 trigger
-rw-r--r-- 1 root root 4096 gen  9 09:05 uevent

@BlandCorporation Hi, as far as I know, on devel channel you don't need to flash the kernel image anymore because already embedded in the OS image. This step, according to my experience, led to break something (for instance the wifi connection). I didn't try myself yet and I don't know if it will resolve your issue either but I think that the best would be to restart from scratch in the devel channel and skip the part related to flashing the kernel image.

Willem, here below the full unity8 report:

Unity8. log full report

Let me know if you need additional check.

Regards.

Matteo

@wdehoog updated the previous post with the full report. I also saw that 0% charging level....weird indeed. Thank you for your help.

@wdehoog Willem, according to the discussion we've had on Telegram, only for convenience I'm reporting here the required output taken out from my Pro5, reviving the present thread:

• Case from "Close to full charging" to "Fully charged": USB phone charging with black screen and white led blinking all the time - charged today from 77% to 100%-------> Full report - Pro5.

Thank you.

Matteo

@AlainW94 that is a very awesome functionality for the UT phone! Thank you for your work Alain! I also own a Pro5 so looking forward to use such a useful utility. I feel the day my UT phone will become my daily driver again is always closer and closer, thank to committed Community people as you are

@rubencarneiro do you have any issue as for instance the lack of automatic connection to the wi-fi Access Point at phone start-up? Every time, I need to manually re-instate the credentials to my home wi-fi to get connected to it.