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When run with a bootstrap loader that uses int 0x10 with 0x1301 in %ax,
incorrect video modes are output to the serial port.  I believe the VGA
image will be correct.  This might also affect the returned values for
some interrupts.

This is caused because the set_cursor_position routine fails to save and
restore %bx.

I'm working on a fix for this.

** Affects: sgabios (Ubuntu)
     Importance: Undecided
     Assignee: Herbie Robinson (hrob)
         Status: New


** Tags: sgabios
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sgabios outputs incorrect video modes
https://bugs.launchpad.net/bugs/1670509
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