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[Qemu-devel] [Bug 1670509] Re: sgabios outputs incorrect video modes
From: |
Nathan Rennie-Waldock |
Subject: |
[Qemu-devel] [Bug 1670509] Re: sgabios outputs incorrect video modes |
Date: |
Tue, 12 Dec 2017 20:10:09 -0000 |
Fixed in qemu, yes. But not Ubuntu. Ubuntu strips prebuilt files from
qemu and builds them from source. For sgabios, using the abandoned
source from Google code.
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https://bugs.launchpad.net/bugs/1670509
Title:
sgabios outputs incorrect video modes
Status in QEMU:
Fix Released
Status in sgabios package in Ubuntu:
Confirmed
Bug description:
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.
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