I have always been using the sunxi u-boot from
'https://github.com/linux-sunxi/u-boot-sunxi' and that works fine, but
now I want to boot the kernel from USB. That is not possible in that
u-boot branch. Therefore I switched to the latest U-Boot
'git://git.denx.de/u-boot.git' for the Olimex Allwinner A10 Lime as this
one does have a working USB mass storage implementation.
But when the kernel and root filesystem is booted and my application
(using DirectFB) starts, the LCD screen is flickering between a correct
image and an incorrect image as if sometimes random image data is
displayed to the screen. Although it looks more like a clock or timing
issue because the colors of the faulty screen resemble the colors of the
correct screen. Also: when the cpu is inactive the screen is more or
less ok but when doing a lot of work the screen starts to flicker. Then
it is stable for a while and after some time it starts flickering again.
I am using the exact same kernel, root filesystem, U-boot environment,
SD-card and 'script.bin' (which defines the hardware layout, I am not
using a device tree file). The only difference is the version (and
origin) of U-boot.
Can anybody shine some light on this? Maybe Hans de Goede? I have seen
his name pop-up a lot of times with the Sunxi branch.
Regards,
Hendrik
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