Difference between revisions of "CI20 Troubleshooting"

From eLinux.org
Jump to: navigation, search
(link to how to get further help)
(add info about hdmi 1080p requirement. It's not complete, somebody please fill in details on best way to get 3.0.8 kernel to force a different mode.)
Line 2: Line 2:
  
 
If you are new to the [[CI20]], take a look at the [[CI20 Beginners Guide|Beginners Guide]] for some tips about getting started.
 
If you are new to the [[CI20]], take a look at the [[CI20 Beginners Guide|Beginners Guide]] for some tips about getting started.
 +
 +
== My CI20 doesn't work with my HDMI screen ==
 +
 +
# Ensure the screen is plugged in ''before'' powering up the CI20, and give it plenty of time to boot.
 +
# Check whether your screen supports a resolution of 1080p at 60Hz (it may even tell you the resolution is unsupported). See below if not.
 +
# Ensure the [[CI20 Hardware#Boot mode selector|boot selector jumper]] is set to boot from NAND (Pins 1 and 2 connected).
 +
# Avoid using a passive HDMI->VGA adapter. Get an active one such as [http://www.amazon.co.uk/gp/product/B00879DM56 this one] instead.
 +
 +
The default factory image uses a Linux v3.0.8 kernel with the 1080p@60Hz display mode configured into the kernel. It is possible to [[CI20 Dev Zone#Building Linux Kernel from sources|rebuild the kernel]] and configure it to use a different display mode.
 +
 +
The newer Linux v3.16 DRM driver for the HDMI hardware fixes this issue properly and uses the EDID provided by the screen to decide which display mode to use (see the [[CI20 upstream|upstream status page]]).
  
 
== I think I 'bricked' my CI20 - do I need to return it? ==
 
== I think I 'bricked' my CI20 - do I need to return it? ==

Revision as of 14:19, 31 October 2014

This page aims to help you resolve comon problems you might have while setting up your MIPS Creator CI20 development board. If you need further help, please ask.

If you are new to the CI20, take a look at the Beginners Guide for some tips about getting started.

My CI20 doesn't work with my HDMI screen

  1. Ensure the screen is plugged in before powering up the CI20, and give it plenty of time to boot.
  2. Check whether your screen supports a resolution of 1080p at 60Hz (it may even tell you the resolution is unsupported). See below if not.
  3. Ensure the boot selector jumper is set to boot from NAND (Pins 1 and 2 connected).
  4. Avoid using a passive HDMI->VGA adapter. Get an active one such as this one instead.

The default factory image uses a Linux v3.0.8 kernel with the 1080p@60Hz display mode configured into the kernel. It is possible to rebuild the kernel and configure it to use a different display mode.

The newer Linux v3.16 DRM driver for the HDMI hardware fixes this issue properly and uses the EDID provided by the screen to decide which display mode to use (see the upstream status page).

I think I 'bricked' my CI20 - do I need to return it?

No, you should not have to return the CI20 if you suspect you have only corrupted the software. The CI20 can always be un-bricked by booting from the SDcard, and in particular by booting the image that re-burns the factory default Debian7 to the NAND flash. That image, along with instructions, is available from the downloads page. You should try this procedure first, and if it fails, provide the logs from the burning and boot process along with your 'RMA request'.