J3710-ITX and 3rd party bootloaders

did you find a solution on this. I see similar when copying files - the output have a rolling flicker

DragonFly wrote: Just received my J3710 and was very anxious to try various Operating Systems (Linux, Windows, OpenElec, RemixOS). All these systems come with their own bootloader when started from USB or when user installed on HD, like Syslinux,  Clover, Refind, Grub or Grub4Dos) Sadly, I noticed very, very slow screen updates (refresh) on all of them. Even text-based loaders are slowly drawn on the screen and typing (when in command-line mode) is barely undo able, because every time I enter text, the screen is very slowly redrawn. Has this something to do with poorly implemented  VESA BIOS Extensions or is something else causing this? Only experienced this slow Video-BIOS behavior on very old nvidia based chipsets and was surprised to see this again in 2016. Have had various Asrock mobo's and none of these exhibit this behavior. Can I expect this to be fixed in future BIOS updates?

DragonFly wrote: No. This seems to be a development issue regarding BIOS VBE extensions and can only be solved by Asrock engineers. However, they appear to be absent in this forum......

This forum is a user level support forum, but is monitored by ASRock technical support. Which is common for mother board support forums.

Did you try to contact ASRock technical support, here: http://event.asrock.com/tsd.asp

This board does support various OS versions besides Windows, but cannot include everything. From this board's specifications:

Microsoft^® Windows^® 10 32-bit / 10 64-bit / 8.1 32-bit / 8.1 64-bit / 7 32-bit / 7 64-bit*
Linux: Ubuntu 14.04.3 LTS / Ubuntu 15.04 / Ubuntu 15.10 / Fedora 23 / Zorin OS 10 / Arch Linux 2015.10.01 / clonezilla-live-20150915-wily-amd64 / Android-x86-4.4-r3

This processor and board are new models from Intel and ASRock. New often includes different, meaning what worked in the past may not now. Also, comparing mother boards as a generic commodity, that all will work in the same manner, is not valid. The differences in performance levels alone, for example, and new technology leaving older technology behind.

For example, Intel no longer uses USB 2.0 drivers with their 100 series desktop chipsets. Only USB 3.0 drivers are used for both USB 2.0 and 3.0. This board does not seem to be affected by this situation, where a USB 3.0 driver must be included in the Windows 7 installation media or the USB ports will not work.

My point is, the OS versions that you use and seem to be running directly from a USB flash drive or HDD, may not have the appropriate drivers for use with this board.

The VESA BIOS Extensions you mentioned are a part of the VBIOS, that is stored in a board's UEFI/BIOS file, correct? If so, that VBIOS is provided by Intel to mother board manufactures. I have seen updates to the Intel VBIOS on many ASRock desktop boards, if and when they are available.

I see Intel has a new Windows compatible video driver for the graphics in this processor. Are the graphics drivers in the non-Windows OS versions you use compatible with the Intel 405 graphics used in this processor?

I'm sorry, but I'm not an expert on the OS versions you use, or the way you use them. Can you boot any of them in EFI/UEFI mode?