BBB-RevC: Problem with Colours in Graphical User Interface

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BBB-RevC: Problem with Colours in Graphical User Interface

Postby mjgray » Thu Oct 06, 2016 10:22 pm

BBB-RevC: Problem with Colours in Graphical User Interface

To anyone if may concern,

I have come across a problem with the colours in a couple of graphical user interfaces, installed on Arch Linux ARM, running on an revision C Beagle Bone Black. The problem is that a couple of colours are swapped. For example normally the Mozilla Firefox logo is an orange fox and an blue globe, in this cases it is an blue fox and an orange globe. Does it ever look weird. This is the case with both XFCE and LXQt. This problem has been reported before under different circumstances, please see the following links:
http://unix.stackexchange.com/questions/158614/red-and-blue-are-switched-in-xfce
http://paulshipley.id.au/blog/coding-tips/ubuntu-14-04-xfce4-xrdp-red-and-blue-colors-are-swapped
I have tried the solution provided in the second link. I entered the following command in the terminal as root "pacman -R xrdp". This returned the following error "target not found: xrdp".
Below I have provided information about my Beagle Bone Black system. I have also provided an photo and an screen shot. It is interesting, when I take a screen shot and view it on another computer the colours are fine. It is not a problem with the display that I am using.

System Information:
System: Beagle Bone Black - Revision C
Manufacture: element14
Power Source: ~5V DC 2.4A
File System Location: 4GB microSDHC Class 2 card
Operating System: Arch Linux ARM
Kernel Version: 4.7.6-1-ARCH (obtained via terminal command “uname -r”)
Graphical User Interface: XFCE version 4.12 and LXQt version 0.11.0
Display: UM-1080CH-OF (https://www.mimomonitors.com/products/um-1080ch-of-10-1-multi-point-capacitive-touch-open-frame-ips-1280x800-hdmi-display)

The operating system was downloaded from https://archlinuxarm.org/about/downloads (Name: ARMv7 AM33x BeagleBone File: ArchLinuxARM-am33x-latest.tar.gz ) and installed using the instructions found at https://archlinuxarm.org/platforms/armv7/ti/beaglebone-black

Screenshot XFCE:
Screenshot2.1.jpg
Screenshot2.1.jpg (221.78 KiB) Viewed 491 times

Photograph XFCE:
Photograph1.jpg
Photograph1.jpg (146.24 KiB) Viewed 491 times


Thank you for taking the time to assist me with this matter. Please let me know if you have any questions.

Regards,


mjgray
mjgray
 
Posts: 7
Joined: Thu Oct 06, 2016 1:00 am

Re: BBB-RevC: Problem with Colours in Graphical User Interfa

Postby mjgray » Mon Oct 10, 2016 6:13 pm

Did some more research and came across the following:
https://groups.google.com/forum/#!topic/beagleboard/PjKwp6XCNnA

Made an "xorg.conf" file containing the text quoted below and placed it in /etc/X11/xorg.conf.d/
Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
DefaultDepth 16
SubSection "Display"
Modes "1280x1024" "1280x960" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480"
EndSubSection
EndSection


No good. See Photograph of the results:
Photograph.JPG
Photograph.JPG (176.98 KiB) Viewed 469 times



Perhaps this in on the right track however. Is there another way to set the colour depth? Did I do this incorrectly?
mjgray
 
Posts: 7
Joined: Thu Oct 06, 2016 1:00 am

Re: BBB-RevC: Problem with Colours in Graphical User Interfa

Postby mjgray » Tue Oct 11, 2016 4:04 am

This may be of some assistance in coming to a solution. I pulled the "xorg.conf" file off the Debian Wheezy image currently on the BeagleBoard website. http://beagleboard.org/latest-images
This configuration file did not work on Arch Linux, however it may provide some direction in resolving this issue. Provided is the content from this file:

Code: Select all
Section "Monitor"
        Identifier      "Builtin Default Monitor"
EndSection

Section "Device"
        Identifier      "Builtin Default fbdev Device 0"
        Driver          "fbdev"
EndSection

Section "Screen"
        Identifier      "Builtin Default fbdev Screen 0"
        Device          "Builtin Default fbdev Device 0"
        Monitor         "Builtin Default Monitor"
        DefaultDepth    16
EndSection

Section "ServerLayout"
        Identifier      "Builtin Default Layout"
        Screen          "Builtin Default fbdev Screen 0"
EndSection
mjgray
 
Posts: 7
Joined: Thu Oct 06, 2016 1:00 am


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