Hi, i discovered and solved incompatible gc2035 driver with some v4l2 applications.
I made some modifications to the 3.4.39-02 kernel-lobo:
gc2035: of 8fps to ~20fps eand improvements in the matter of light.
The original driver accepts only 800??600, added the following resolutions: 800??600/640??480/320??240
sunxi_wdt: builtin to module (greater flexibility to change the module options) / pr_info some functions, causing flood in kern.log (switched to pr_debug)
CONFIG_CMDLINE=???earlyprintk=ttyS0,115200 loglevel=5 initcall_debug=0 console=ttyS0,115200 console=tty0 fsck.mode=force fsck.repair=yes init=/init ipv6.disable=1
kernel size: ~59mb
Thank you all!!