random freezing

Hi,
I backed the pocket on Indiegogo, one ubuntu version for myself and another windows version for a friend and received it a couple months ago, and mostly I am very happy with the device, but a couple weeks ago I started experimenting some weird issues. Sometimes, not often, the system would just stop responding at all, cant move the cursor, cant switch to another virtual terminal (Ctrl+Alt+F4), cant tell the kernel to shutdown (Alt+PtrScr+b), nothing, the only way to exit this state is by holding the power button for a few seconds. And in the last week is happening more often.

And sometimes when I start the system I see this (as you can see, there are several missing characters):


I found a way to force the issue by installing memtester software (sudo apt-get install memtester) and running it (sudo memtester 2G), after a few seconds, or a few minutes, its not constant, the system freezes. It also happens when I play rocket league.

I am running the nexus511 ubuntu-GNOME image (https://apt.nexus511.net/) since I received it.

I want to know if there is anything I could do to diagnose/fix the problem, is it a RAM issue?

Thanks, Nico.

genghisnico13 wrote:Hi,
I backed the pocket on Indiegogo, one ubuntu version for myself and another windows version for a friend and received it a couple months ago, and mostly I am very happy with the device, but a couple weeks ago I started experimenting some weird issues. Sometimes, not often, the system would just stop responding at all, cant move the cursor, cant switch to another virtual terminal (Ctrl+Alt+F4), cant tell the kernel to shutdown (Alt+PtrScr+b), nothing, the only way to exit this state is by holding the power button for a few seconds. And in the last week is happening more often.

And sometimes when I start the system I see this (as you can see, there are several missing characters):


I found a way to force the issue by installing memtester software (sudo apt-get install memtester) and running it (sudo memtester 2G), after a few seconds, or a few minutes, its not constant, the system freezes. It also happens when I play rocket league.

I am running the nexus511 ubuntu-GNOME image (https://apt.nexus511.net/) since I received it.

I want to know if there is anything I could do to diagnose/fix the problem, is it a RAM issue?

Thanks, Nico.

You can try to brush this firmware

gpdpocket-20171017-ubuntu-17.04-desktop-amd64.iso (Third party)
This edition of firmware is provided by stockmind, unofficial development, and is based on the official Ubuntu_0809_2. Iso version of the firmware.
stockmind: https://github.com/stockmind/gpd-pocket-ubuntu-respin
Mega Download: https://mega.nz/#F!8WpQRZrD!0XHgajeG-QVZTp1Jbjndgw
Install the video tutorial: https://www.youtube.com/watch?v=HnIV29HwgrI&t=71s