Hello,
I apologize for my English.
I just received my A20-Olinuxino Micro-but not install a Linux distribution (Debian). I download this image (https://www.olimex.com/wiki/A20-OLinuXino-MICRO#Linux) and I put this file on SD via Win32diskimager and nothing happens. No display. I also did the test with a MicroSD. Same problem.
Have you any idea?
Sincerely,
Do you have an RS232-USB converter to connect to UART0 on the board? The Console runs at 115200 baud and will show what the board is doing during the boot. The boot partition of the micro SDCard contains a file "script.bin", which has to match the output you want to use (i.e. LCD, HDMI).
The Console is the most important way to debug problems - so start there.
What revision is your board? Rev. D?
Also be sure you are using a 9-12V power supply with at least 1A to power the board (needs only about 300mA, but with LCD and USB this can go up quickly)
Thank you for your reply and your help.
I do not have a USB to RS232.
I have a 12V power supply purchased along with the board.
The board is Rev C.
I use the HDMI output I have not bought screen.
Sincerely,
Too bad you don't have a converter.
I don't remember if the HDMI was the default on that image, or the LCD.
If you have a card reader, you can plug in the micro sdcard and copy the script.bin from the directory "script_a20_linux_HDMI_sd" to the root. That way, you can be sure that the card will boot into HDMI mode - if it boots at all.
Thank you very much for your help.
I put Debian on an SD or MicroSD card?
Both solutions can work?
Sincerely,
When I put the board on, I only have the power LED that lights up and nothing else. Is this normal? Should I not have CHGLED LED that lights?
Sincerely?
The micro SDcard is the one that boots.
Unfortunately, only the red power LED comes on. It would have been better to have an LED blink or whatever.
The CHGLED is on when there is a LiPo battery connected and it is charging.
The board can take a good 15 seconds before anything visible happens.
In my case, the first thing I ever see is the keyboard lights that come on, then the optical mouse laser is on.
A blinking LED, or a different LED coming on when the board turns on would be great.
The current LED only indicates the board is powered.
Thank you for all.
Debian is installed on the board.
There existe a version of Debian without graphical interface ?
Cordialy,
Well Debian R2 (the latest version available on Wiki) starts in text mode in my case, so I don't understand your question: does R2 starts with X in your case?
Anyway you can "force" a Debian distro in text mode by editing /etc/inittab and specifying the runlevel 2 as initlevel.
This way, X is not started (it starts at runlevel 5).
Fernando
Thanks very much for your reply.
The card boot correctly on the debian terminal.
Cordialy
Guitou
Hi there,
Have a similar problem.
When I power up my board, I receive no HDMI signal at all.
I'v got a USB to TTL Converter with CP2102 Chipset, can I use it to debug on UART port?
Thanks :)
After the install of debian and an update of the distro. It's impossible to install mysql-server.
Here is the error :
Setting up mysql-server-5.5 (5.5.31+dfsg-0+wheezy1) ...
[ ok ] Stopping MySQL database server: mysqld.
[FAIL] Starting MySQL database server: mysqld . . . . . . . . . . . . . . failed!
invoke-rc.d: initscript mysql, action "start" failed.
dpkg: error processing mysql-server-5.5 (--configure):
subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of mysql-server:
mysql-server depends on mysql-server-5.5; however:
Package mysql-server-5.5 is not configured yet.
dpkg: error processing mysql-server (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
mysql-server-5.5
mysql-server
Have you ever seen this error? Nothing in the log message !
Cordialy
Guitou
Sorry,
no one for help me ?
Cordialy
The problem to install mysql it's solved by installing the new version of debian for the A20.
The link for this image : https://docs.google.com/file/d/0B-bAEPML8fwleDJMaG5reWZZeDQ/edit?usp=sharing (https://docs.google.com/file/d/0B-bAEPML8fwleDJMaG5reWZZeDQ/edit?usp=sharing)
Cordialy