Hello everyone,

I am using Arch Linux ARM on a Cubietruck.
My distribution packages the most current linux-sunxi kernel for use
with both Cubieboard 2 and Cubietruck.

However, I now stumbled upon a kernel configuration problem with the
two boards.

Cubietruck display output does only seem to work when *all* of
FB_SUNXI are statically compiled into the kernel like this:

CONFIG_FB_SUNXI=y
CONFIG_FB_SUNXI_RESERVED_MEM=y
CONFIG_FB_SUNXI_UMP=y
CONFIG_FB_SUNXI_LCD=y
CONFIG_FB_SUNXI_HDMI=y

Neither VGA nor HDMI work if one of these is set to build as module,
regardless of module loading order in modprobe.conf.d, etc.

However, if CONFIG_FB_SUNXI_LCD=y is set in kernel config, the
Cubieboard 2 seems to refuse to boot as the LCD driver causes a kernel oops.

Unfortunately, I can't provide additional information about this LCD driver 
problem,
as I don't own a Cubieboard 2 myself.

I took the issue to my distribution, but they told me that it won't be 
possible to
integrate the needed kernel configuration changes for Cubietruck display as 
long
as the blocking issue with the LCD driver isn't fixed for Cubieboard 2 and 
that this
would be needed to be fixed upstream.

You can see relevant issues here:
https://github.com/archlinuxarm/PKGBUILDs/issues/767
https://github.com/archlinuxarm/PKGBUILDs/commit/9dffd3a07a143e056d66a4f2635c9d26a6e777ab
https://github.com/archlinuxarm/PKGBUILDs/issues/775

Help would be greatly appreciated - many thanks in advance!

Fabian

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