Today's update of xserver-xorg-core has fixed the issue.
xorg-server (2:1.17.1-0ubuntu3) vivid; urgency=medium
* Add a patch to fix vesa int10 failure. (LP: #1433198)
-- Maarten Lankhorst Thu, 19 Mar 2015
10:13:08 +0100
** Changed in: xorg-server (Ubuntu)
Status: Confirmed => Fix
This is also affecting Ubuntu MATE 15.04 daily images for 17th March
2015. When booting the i386 or and64 images under VirtualBox is it not
possible to reach Ubiquity or the Live desktop.
The full Xorg.0.log is attached and also available in the paste below:
* http://paste.ubuntu.com/10615071/
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: xorg (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1432899
Title:
VESA
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: xorg-server (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1432899
Title:
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: xserver-xorg-driver-vesa (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/143
** Also affects: xserver-xorg-driver-vesa (Ubuntu)
Importance: Undecided
Status: New
** Also affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Also affects: xorg-server (Ubuntu)
Importance: Undecided
Status: New
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