BBXM HDMI issue on ubuntu-14.04.1 with LXDE

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1

Hello All,

I’ve just completed a fresh install of:

ubuntu-14.04.1-console-armhf-2014-10-29

on a BB-XM rev B.

I ran into issues with HDMI on kernel versions above 3.2:

https://groups.google.com/d/msg/beagleboard/zi6Ft6JI2OM/5wuHfHtp3f0J

but because of a stupid error had to upgrade (wiped a partition on the SD card by mistake).

Anyway on the new install the HDMI was working correctly, showing text on startup. I then installed LXDE & no more HDMI. ‘Tux’ is shown in the top left hand corner for the initial couple of seconds but then the TV gives up & shows no signal. I’ve edited /boot/uEnv.txt to:

`
#Docs: http://elinux.org/Beagleboard:U-boot_partitioning_layout_2.0

uname_r=3.17.1-armv7-x3

#dtb=

uuid=f25adba4-d22e-462e-adaf-bfb0013c91f1

#Force HDMI resolution for LG42LV550T-ZA
#From: https://groups.google.com/forum/?hl=en-GB#!searchin/beagleboard/HDMI/beagleboard/TOCarHIhVI8/_UxUKnOIJ9UJ
#cmdline=video=DVI-D-1:1024x768@60e

cmdline=quiet

`

But no success. I attach a PDF of the TV supported resolutions. It seems like it should work. Any ideas?

Leo

Resolutions.pdf (40.3 KB)

2

So from ^... Your just setting "cmdline=quiet".. if you want to force 1024x768:

#cmdline=quiet

cmdline=video=DVI-D-1:1024x768@60e

"#" is a comment in u-boot...

Regards,

3

OH btw... when you installed LXDE, we need the omap ddx to be installed to:

cd /opt/scripts/
git pull
cd ./tools/graphics/

./ti-omapdrm.sh

Regards,

4

Robert,

Whoops, yes missed that. On removal still no luck though. I also tried a different resolution (1920x1080) but no difference.

Leo

5

Will give it a go…

6

Yeah, it's probally the xorg driver:

cat /var/log/Xorg.0.log

would show it complaining..

Regards,

7

Robert,

Installed the omap ddx but no luck. The Xorg logfile is attached.

Thanks for the interest.

Leo

Xorg.0.log (26.8 KB)

8

Added .txt to end of attached filename

Xorg.0.log (26.8 KB)

9

Okay, looks like xorg tried to set it up with what it wanted.. What
does xrandr show? (this is from the serial/ssh:)

ubuntu@arm:~$ xrandr -display :0.0 -q
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 2048 x 2048
DVI-D-1 connected 1280x1024+0+0 338mm x 270mm
   1280x1024 60.0*+
   1152x864 75.0
   1024x768 75.1

Regards,

10

Robert,

Before connection to the TV:

xrandr -display :0.0 -q
Screen 0: minimum 320 x 200, current 720 x 480, maximum 2048 x 2048
DVI-D-1 connected 720x480+0+0 160mm x 90mm
800x600 56.2
720x480 (0x43) 27.0MHz
h: width 720 start 736 end 798 total 858 skew 0 clock 31.5KHz
v: height 480 start 489 end 495 total 525 clock 60.0Hz

After connection to the TV:
ubuntu@arm:~$ xrandr -display :0.0 -q
Screen 0: minimum 320 x 200, current 720 x 480, maximum 2048 x 2048
DVI-D-1 connected 720x480+0+0 160mm x 90mm
1280x1024 60.0
720x576 50.0
720x480 60.0* 59.9

Leo

11

Does the display light up when you do:

xrandr -display :0.0 --output DVI-D-1 --mode 1280x1024 --rate 60

Regards,

12

No, no display on the TV.

After the command:

`
ubuntu@arm:~$ xrandr -display :0.0 -q
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 2048 x 2048
DVI-D-1 connected 1280x1024+0+0 160mm x 90mm
1280x1024 60.0*
720x576 50.0
720x480 60.0 59.9

`