** Description changed:
+ [Impact]
+ Some buggy BIOSes may fail to properly boot following the chosen boot order,
and pass and invalid drive ID to syslinux.
+
+ [Test case]
+ (requires booting in BIOS mode)
+ - Attempt to boot an Ubuntu image on a USB drive on an affected system.
+ - Attempt to boot an Ubuntu image on a USB drive on a system that isn't
affected by this issue.
+
+ [Regression potential]
+ We believe this has a very limited risk of regression. Boot failures may
result from changing the code used at early boot for our images, but this
should only be adding a hook to force booting on disk 0x80 (first drive) when
Ctrl is pressed, and boot normally otherwise. Holding Ctrl while booting is
already an accepted "expert" feature to be used in special circumstances.
+
+ Furthermore, this only affects users booting in BIOS mode (no effect on
+ UEFI).
+
+ --
+
I'm reviving this report since the issue is still present in 14.04 and
15.10 syslinux, which is used in the various flavour hybrid ISOs, via
mbr/isohdpfx.{S,bin}
The same system I originally reported in comment #30 is still affected.
Original upstream discussion (March 2009):
http://www.syslinux.org/archives/2009-March/012254.html
Peter reworked the patches in 2009 and created additional MBRs with the
suffix "_c" (press Ctrl to force disk 0x80) and "_f" (unconditionally
force disk 0x80).
See: http://www.syslinux.org/wiki/index.php/Mbr
These images are in the Ubuntu 14.04 package but were removed (in
Debian) - and no longer in later Ubuntu releases - with:
syslinux (3:6.03~pre19+dfsg-3) unstable; urgency=low
* Also skipping isohd*x_{c,f}.bin in syslinux-common.
...
-- Daniel Baumann <[email protected]> Sun, 24 Aug 2014
00:19:38 +0200
** Description changed:
[Impact]
Some buggy BIOSes may fail to properly boot following the chosen boot order,
and pass and invalid drive ID to syslinux.
+
+ Known affected systems are:
+ - Sony Vaio VGN-FE41Z
+ - possibly other systems with a Phoenix BIOS.
[Test case]
(requires booting in BIOS mode)
- Attempt to boot an Ubuntu image on a USB drive on an affected system.
- Attempt to boot an Ubuntu image on a USB drive on a system that isn't
affected by this issue.
[Regression potential]
We believe this has a very limited risk of regression. Boot failures may
result from changing the code used at early boot for our images, but this
should only be adding a hook to force booting on disk 0x80 (first drive) when
Ctrl is pressed, and boot normally otherwise. Holding Ctrl while booting is
already an accepted "expert" feature to be used in special circumstances.
Furthermore, this only affects users booting in BIOS mode (no effect on
UEFI).
--
I'm reviving this report since the issue is still present in 14.04 and
15.10 syslinux, which is used in the various flavour hybrid ISOs, via
mbr/isohdpfx.{S,bin}
The same system I originally reported in comment #30 is still affected.
Original upstream discussion (March 2009):
http://www.syslinux.org/archives/2009-March/012254.html
Peter reworked the patches in 2009 and created additional MBRs with the
suffix "_c" (press Ctrl to force disk 0x80) and "_f" (unconditionally
force disk 0x80).
See: http://www.syslinux.org/wiki/index.php/Mbr
These images are in the Ubuntu 14.04 package but were removed (in
Debian) - and no longer in later Ubuntu releases - with:
syslinux (3:6.03~pre19+dfsg-3) unstable; urgency=low
* Also skipping isohd*x_{c,f}.bin in syslinux-common.
...
-- Daniel Baumann <[email protected]> Sun, 24 Aug 2014
00:19:38 +0200
** Also affects: syslinux (Ubuntu Yakkety)
Importance: Undecided
Status: New
** Also affects: syslinux (Ubuntu Xenial)
Importance: Undecided
Status: New
** Changed in: syslinux (Ubuntu Xenial)
Status: New => Triaged
** Changed in: syslinux (Ubuntu Yakkety)
Status: New => Triaged
** Changed in: syslinux (Ubuntu Xenial)
Importance: Undecided => Medium
** Changed in: syslinux (Ubuntu Xenial)
Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)
** Changed in: syslinux (Ubuntu Yakkety)
Importance: Undecided => Medium
** Changed in: syslinux (Ubuntu Yakkety)
Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)
** Changed in: ubuntu-cdimage
Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)
** Changed in: syslinux (Ubuntu)
Status: Triaged => In Progress
** Changed in: ubuntu-cdimage
Status: New => In Progress
--
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/277903
Title:
Missing Operating System [message at boot]
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