Well, I decided to fetch and compile dingux kernel. I use "andLinux", and I had to overcome some config issues (e.g. neither "make menuconfig", "make gconfig" or "make xconfig" worked, and I didn't want to use naked "make config"), but let's leave my personal system problems aside.
First of all, I fetched the Boukichi's version of kernel:svn checkout http://dingux-code.googlecode.com/svn/linux-18.104.22.168-dingux/trunk/ dingux-code-read-only
(it took some time)
Then I ran "make a320_defconfig" and "make menuconfig" from dingux-code-read-only dir (the kernel's source root), and set my LCD driver to 9331 using procedure described in README.A320.
After that I went in the kernel menu toDevice Drivers->USB Support->USB Gadget Support
1) disabled "RNDIS Support (EXPERIMENTAL)
2) entered "USB Gadget Drivers
" and picked "Ethernet Gadget (with CDC Ethernet support)
Then I compiled the kernel with "make zImage" and voila - now I have a kernel with CDC/ECM support and without RNDIS.
So I copied it to the root of my SD card.
Then I downloaded driver you mentioned, but it wasn't enough. In order to use it I had to modify one line in file<path>\Thesycon\CdcEcm\V1.8.0_Demo\idisk\x86\cdcecm_demo.inf
should be replaced with:%S_DeviceDesc%=_Install,USB\VID_0525&PID_A4A1
Now I connect my Dingoo to PC, install the driver using the inf file above, and voila - the connection works, it's rock stable
Of course, for file transfer don't forget to use FileZilla (at IP 10.1.0.2) and nothing else - it's the only known working FTP client.
As for driver that works only 4 hours and requires PC restart after - I think it's not that critical. My development sessions are much shorter, and I don't mind to reboot sometimes to restart the driver.Joyrider, thank you a lot for this idea !!
I think we should let booboo know about your findings.
P.S. After researching the net and booboo's blog I see that RNDIS driver is indeed broken, and various workarounds didn't help, or at least didn't help to everybody. This makes CDC/ECM a great replacement and I am really happy. Thank you again !