[Bug 191591] New: [vt] vt_vga driver produces corrupted output with

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=191591

            Bug ID: 191591
           Summary: [vt] vt_vga driver produces corrupted output with
                    fonts other than 8 pixels wide
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: Needs Triage
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: [e-mail]
          Reporter: [e-mail]

To reproduce run "vidcontrol -f gallant" when using the vt_vga driver.
Resulting output appears as in the attached screenshot.  
vt_efifb or i915 framebuffer is fine.


Gallant is 12 px wide.  It looks like character positions that don't start at
an 8-bit boundary (i.e., every other column) get shifted left to the previous
8-bit boundary, overwriting part of the previous column's character.

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