Charging Port Abnormalities Reminder

 My Zenfone4 showed CHARGING PORT ABNORMALITIES REMINDER without charging nor plugged cable.  It is still shown and annoying.

It may become when I have to purchase the new smartphone...

KNOPPIX 9.1 CD version

KNOPPIX is the very useful OS based on Debian linux, and can be run from live CD. However, recent versions of KNOPPIX became bigger more than 4GB needs DVD.  It can be installed on a USB flash media.

Easy2Boot is also very useful utility which can boot multiple OSs from ISO files stored in the single removal flash media.  But, recent KNOPPIXs were very difficult (not impossible) to be treated by E2B because KNOPPIX ISOs (>4GB) were not stored in the FAT32 drive of E2B.

In KNOPPIX 9.1, CD image is also released after several years !! It can become loaded by E2B.

KNOPPIX9.1 with E2B is the very powerful and portable tool for our computing life!! 

Wakayama ramen Ide shoten

 I traveled to Wakayama city in Japan and tried Wakayama ramen.

I went to Ide shoten which is very old and famous ramen restaurant in  Wakayama.

This ramen is Porky soup and soy sauce taste (Tonkotsu-shoyu) with many roasted pork slices. So good!!

But, the inside of this restaurant was very dirty.

Mauritius underwater waterfall from airplane

When I went to Mauritius, I could see it from Airplane.

Raspberry pi zero and USB3 memory stick

Raspberry pi Zero (Pi-Zero) may not be able to recognize USB3 devices because of a power shortage of USB port. My Extreme Pro USB3.0 stick (128G, SANDISK) is not recognized by Pi-Zero without using a self-powered USB hub. However, a self-powered USB hub is too inconvenience to carry due to a bulky AC adapter.

The "max_usb_current=1" in the /boot/config.txt, which changes the Maximum USB current to 1.2 A, is not effective for Pi-Zero

I am using "Double-Powered USB hub (USB-HUB227WH3, SANWA supply, JAPAN)" which I bought very long ago.

If the Red connector is connected to a USB port or a power adapter, electrical power of USB hub is overloaded above 1A, like a self-powered Hub.  It can also be used as a bus-powered hub without using the Red connector.

With the USB-OTG setting, My USB3.0 memory stick can be used in Pi-Zero by connecting the red connecter to a 1A power adapter only.

Needless to say, just USB2.0 speed.

HDMI to VGA Converter may become alternative of HDMI Display Emulator for headless PC

Most of stick PC including my Meegopad T-01 cannot be used without monitor (headless PC).  HDMI dummy plug (Display Emulator) must be necessary.

However,  HDMI to VGA Converter which is no use at present may become alternative of Display Emulator. I can access the monitor-less Meegopad T-01 by remote desktop with VGA converter.

Remote desktop on Ubuntu-Mate for Raspberry pi

The long-awaited Ubuntu-Mate 18.04 for Raspberry pi is disclosed !!

I immediately installed for my Raspberry pi3.

However, the remote desktop from windows (xRDP) does not work well but only shows black screen.

From web information, several configurations are required for xRDP on ubuntu-mate 18.04.

My setting for xRDP and more is below.

1.

sudo apt-get update

sudo apt-get upgrade

2. (not for xRDP)

sudo apt-get install hardinfo ntp cifs-utils

3.

sudo apt-get install tightvncserver xrdp

4. EDIT "/etc/xrdp/startwm.sh"

Insert below two lines 

             unset DBUS_SESSION_BUS_ADDRESS

             exec mate-session

before the line "test -x /etc/X11/Xsession && exec /etc/X11/Xsession"

5. EDIT "/etc/X11/Xwrapper.config"

Add below to the last line

           allowed_users=anybody

           needs_root_rights=no

6. EDIT "/boot/config.txt" (not for xRDP)

Add below to the last line

           # turn power LED into heartbeat

           dtparam=pwr_led_trigger=heartbeat

7.

sudo reboot