[fedora-arm] pandaboard video output

[Dennis Gilmore]

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El Mon, 27 Aug 2012 20:35:06 -0500
Jon <jdisnard at gmail.com> escribió:
> >> Here is what I tried in /boot/uboot/uEnv.txt:
> >> omapfb.mode=dvi:1280x1024MR-24 at 60 omapdss.def_disp=dvi
> >
> > we use omapdrm not omapfb so none of those options will have any
> > effect. its all auto detected and auto setup. if the edid data is
> > not read from the monitor you will get 1024x768 only. ive not tried
> > the 3.5 based kernels as im not at home where i have access to a
> > monitor.
> 
> 
> Thanks Dennis.
> 
> The information about omapdrm was good, gave something to
> troubleshoot.
> 
> 
> On the working (3.4.2-3) kernel, you can do this:
> 
> # cd /sys/devices/platform/omapdrm.0/drm/card0/card0-HDMI-A-1/
> 
> # cat modes
> 1024x768
> 800x600
> 848x480
> 640x480
> 
> 
> 
> On the latest kernel 3.5.2-3 that sysfs path does not exist. :(
> So I guess the omapdrm driver is not happy.
> 
> The output of lsmod does not have as much stuff as the 3.4.2-3 kernel
> had.
> 
> 
> Here I tried to load omapdrm module:
> 
> #
> insmod /lib/modules/3.5.2-3.fc17.armv7hl.omap/kernel/drivers/staging/omapdrm/omapdrm.ko
> Error: could not insert
> module /lib/modules/3.5.2-3.fc17.armv7hl.omap/kernel/drivers/staging/omapdrm/omapdrm.ko:
> Unknown symbol in module

you should just do "modprobe omapdrm" not insmod the .ko as it takes
care of its deps.

do a lsinitrd on the initramfs file in /boot and make sure that it has
the omapdrm module in it.

Dennis
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