Unable to display graphics on two screens connected

[Marcin Juszkiewicz]

When two displays are connected to PandaBoard then only one is displaying something:

1. boot with DVI and HDMI connected - only DVI one works (when it get unplugged then no graphics at all)
2. boot with DVI and then connect HDMI one - only DVI works
3. boot with HDMI and then connect DVI one - only HDMI works
4. boot without monitors, connect HDMI - I got:
[ 109.568664] omapdss HDMI error: Failed to program DDC

[ 109.583587] omapdss HDMI error: E-EDID checksum failed!!
[ 109.648529] omapdss HDMI error: Failed to program DDC
[ 109.724914] omapdss HDMI error: Failed to program DDC
[ 109.781311] omapdss HDMI error: Failed to program DDC

and then:
Screen 0: minimum 640 x 480, current 1024 x 768, maximum 2048 x 2048
pvr0 disconnected
pvr1 connected
   1024x768 60.0
   800x600 60.3
   848x480 60.0

When connected DVI cable:
[ 508.846557] omapdss HDMI error: Failed to program DDC
[ 508.865447] omapdss HDMI error: Failed to program DDC
Screen 0: minimum 640 x 480, current 1024 x 768, maximum 2048 x 2048
pvr0 connected
   1280x960 59.9
   1280x720 59.7
   720x480 59.9
   720x400 70.1
pvr1 connected
   1024x768 60.0
   800x600 60.3
   848x480 60.0
linaro@linaro:/root$ xrandr --output pvr0[ 516.333160] omapdss HDMI error: Failed to program DDC
[ 516.352142] omapdss HDMI error: Failed to program DDC
  --auto
[ 519.346923] omapdss HDMI error: Failed to program DDC
[ 519.366333] omapdss HDMI error: Failed to program DDC
linaro@linaro:/root$ xrandr --output pvr0 --auto
[ 520.973754] omapdss HDMI error: Failed to program DDC
[ 520.992523] omapdss HDMI error: Failed to program DDC

[Ricardo Salveti (rsalveti)]

Can you post the kernel and sgx packages you used?

[Marcin Juszkiewicz (hrw)]

root@linaro:~# apt-cache policy linux-image-2.6.38-1003-linaro-omap
linux-image-2.6.38-1003-linaro-omap:
  Installed: 2.6.38-1003.4~ppa5
  Candidate: 2.6.38-1003.4~ppa5
  Version table:
 *** 2.6.38-1003.4~ppa5 0
        500 http://ppa.launchpad.net/linaro-maintainers/overlay/ubuntu/ natty/main armel Packages
        100 /var/lib/dpkg/status
root@linaro:~# uname -a
Linux linaro 2.6.38-1003-linaro-omap #4~ppa5-Ubuntu SMP PREEMPT Wed May 25 14:44:32 UTC 2011 armv7l armv7l armv7l GNU/Linux

root@linaro:~# dpkg -l *{sgx,pvr}*|grep '^ii'
ii libegl1-sgx-omap4 1.7.5.2+git20110610+9696932c.2-1 PowerVR SGX540 EGL libraries for OMAP4
ii libgles1-sgx-omap4 1.7.5.2+git20110610+9696932c.2-1 PowerVR SGX540 OpenGL|ES 1.x libraries for OMAP4
ii libgles2-sgx-omap4 1.7.5.2+git20110610+9696932c.2-1 PowerVR SGX540 OpenGL|ES 2.x libraries for OMAP4
ii libopenvg1-sgx-omap4 1.7.5.2+git20110610+9696932c.2-1 PowerVR SGX540 OVG libraries for OMAP4
ii pvr-omap4 1.7.5.2+git20110610+9696932c.2-1 PowerVR SGX540 libraries for OMAP4, remaining libs and binaries
ii pvr-omap4-data 1.7.5.2+git20110610+9696932c.2-1 PowerVR SGX540 libraries for OMAP4, data files
ii pvr-omap4-kernel-dkms 1.7.5.2+git20110610+9696932c-1 PowerVR SGX540 kernel driver for OMAP4 in DKMS format.
root@linaro:~# cat /proc/cmdline
console=tty0 console=ttyO2,115200n8 root=UUID=dced6198-6ef1-41e1-9103-d7489a009acc rootwait ro earlyprintk fixrtc nocompcache vram=48M omapfb.vram=0:24M mem=456M@0x80000000 mem=512M@0xA0000000