VL-EPU-3311 Reference Manual
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KNOWN ISSUES
Hardware
A microSD card cannot be removed or inserted if certain cables are attached to the micro
USB 3.0 connector. Many USB 3.0 cables have a housing that is thick enough to obstruct
access to the microSD socket. Some cables may not produce this limitation.
The micro USB 3.0 connector can be damaged (that is, detached from the board) if an
inserted USB cable is removed by pulling up and away from the board. To reduce the risk of
damaging the connector (and the board), pull the cable straight out of the connector; also, do
not rock or wiggle the cable back and forth to loosen it from the connector.
Operating Systems
In Linux, a dual-display configuration (using both the LVDS and the Mini Disp+
connectors) will fail to show output on the LVDS port unless the operating system is
configured to boot in UEFI mode. Single display configurations do not have an issue.
In Ubuntu 14.04, if an LVDS monitor goes into power saving mode or the operating system
goes into suspend or hibernate mode, the LVDS monitor will fail to come back on.
BIOS
An installed microSD card disappears from Windows Device Manager after the board enters
an S3 state. Extracting/re-inserting the microSD card does not bring it back; the board must
be rebooted for Windows to recognize the microSD card again.
In the USB Configuration menu, disabling the xHCI controller without enabling the EHCI
controller prevents the use of all USB devices, including the keyboard. Without a keyboard
to navigate BIOS Setup utility, the board may need to be returned to VersaLogic for repair.
