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Parallella Community • View topic - screen was not displayed
Page 1 of 2

screen was not displayed

PostPosted: Mon Jan 18, 2016 2:00 am
by byhuang
Hi guys,

I am a newer to use parallella board (P1601).
I followed the instructions from the official website to create a bootable micro-SD card(http://www.parallella.org/create-sdcard/).
I downloaded the "ubuntu-14.04-hdmi-z7010-20140611.img.gz" with display version, and followed the steps which was using MAC air to build the bootable micro-SD.
Then I inserted the micro-SD, power adapter and a micro-HDMI to VGA cable with a VGA which was connected to screen into the P1601,
but the screen was not displayed and both of CR8 and CR10 lights were green.
So were the steps as previously said was failed to create a micro-SD with display or I made the mistake from the steps ?

Thanks.

Re: screen was not displayed

PostPosted: Mon Jan 18, 2016 1:48 pm
by aolofsson
Unfortunately, I don't think there has been much success with hdmi converter dongles. (DVI or VGA).
Things may be different with updated ADI hdmi chip drivers, but for now we recommend using display with native HDMI port.

Re: screen was not displayed

PostPosted: Tue Jan 19, 2016 8:48 am
by byhuang
Thank you for your reply.
But I also used a microHDMI to HDMI adapter and connected the HDMI line to screen, the screen was still not displayed.
Or it might boot failed ? I tried two microSD cards.

Thanks.

Re: screen was not displayed

PostPosted: Tue Jan 19, 2016 1:58 pm
by sebraa
Which image did you write to the SD card?
Because not all images support HDMI output.


If the boot does not fail, the Parallella will try to get an IP address through DHCP on the Ethernet port. Check this first to see if your image is working at all.

Re: screen was not displayed

PostPosted: Wed Jan 20, 2016 2:37 am
by byhuang
Hi,

I installed the image " ubuntu-14.04-hdmi-z7010-20140611.img.gz " using mac air from the Parallella official website.

The ip address was setting inside the image ? Then I could used another PCs to ssh in a local lan.

Although dhcp was a good method, the screen was not displayed and the dhcp ip address was still unknown.

Thanks.

Re: screen was not displayed

PostPosted: Wed Jan 20, 2016 9:36 am
by sebraa

Re: screen was not displayed

PostPosted: Thu Jan 21, 2016 9:21 am
by byhuang
Hi

I tried to use the "ubuntu-14.04-headless-z7010-20150130.1.img.gz" and used a microhdmi-to-vga adapter to display the console mode, but it seems that it could not display.

So how could I solve this problem?

Board : p1601 desktop version

Re: screen was not displayed

PostPosted: Thu Jan 21, 2016 2:33 pm
by sebraa
The headless image does not support the HDMI output, so the display naturally will not show anything.
This test was more about to verify whether your Parallella actually works. Does it? If not, try the imge for z7020 to check.

Re: screen was not displayed

PostPosted: Thu Jan 21, 2016 2:37 pm
by byhuang
Oh , I understand what you meant
But I don't know how to login the board without screen(and ip is dhcp)?
And how could I know the board is booted or not ?

Thank you :)

Re: screen was not displayed

PostPosted: Thu Jan 21, 2016 5:01 pm
by sebraa