[Qemu-devel] [Bug 1670509] [NEW] sgabios outputs incorrect video modes

[Qemu-devel] [Bug 1670509] [NEW] sgabios outputs incorrect video modes

[Herbie Robinson]

Public bug reported:

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: qemu
     Importance: Undecided
         Status: New


** Tags: sgabios

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Title:
  sgabios outputs incorrect video modes

Status in QEMU:
  New

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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[Qemu-devel] [Bug 1670509] Re: sgabios outputs incorrect video modes

[Herbie Robinson]

** Changed in: qemu
     Assignee: (unassigned) => Herbie Robinson (hrob)

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Title:
  sgabios outputs incorrect video modes

Status in QEMU:
  New

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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1670509/+subscriptions

[Qemu-devel] [Bug 1670509] Re: sgabios outputs incorrect video modes

[Herbie Robinson]

** Project changed: qemu => sgabios (Ubuntu)

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Title:
  sgabios outputs incorrect video modes

Status in sgabios package in Ubuntu:
  New

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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/sgabios/+bug/1670509/+subscriptions

[Qemu-devel] [Bug 1670509] Re: sgabios outputs incorrect video modes

[Herbie Robinson]

** Also affects: qemu
   Importance: Undecided
       Status: New

** Changed in: qemu
     Assignee: (unassigned) => Herbie Robinson (hrob)

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Title:
  sgabios outputs incorrect video modes

Status in QEMU:
  New
Status in sgabios package in Ubuntu:
  New

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.

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 1670509] Re: sgabios outputs incorrect video modes

[Herbie Robinson]

I don't think my e-mailed patch got through...  I'm going to keep
trying, but in case anyone needs the patch in the interim...

** Patch added: "0001-SGABIOS-fix-wrong-video-attrs-for-int-10h-ah-13h.patch"
   https://bugs.launchpad.net/qemu/+bug/1670509/+attachment/4834118/+files/0001-SGABIOS-fix-wrong-video-attrs-for-int-10h-ah-13h.patch

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Title:
  sgabios outputs incorrect video modes

Status in QEMU:
  New
Status in sgabios package in Ubuntu:
  New

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.

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 1670509] Re: sgabios outputs incorrect video modes

[Ubuntu Foundations Team Bug Bot]

The attachment "0001-SGABIOS-fix-wrong-video-attrs-for-int-10h-ah-
13h.patch" seems to be a patch.  If it isn't, please remove the "patch"
flag from the attachment, remove the "patch" tag, and if you are a
member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by
~brian-murray, for any issues please contact him.]

** Tags added: patch

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Title:
  sgabios outputs incorrect video modes

Status in QEMU:
  New
Status in sgabios package in Ubuntu:
  New

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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1670509/+subscriptions

[Qemu-devel] [Bug 1670509] Re: sgabios outputs incorrect video modes

[Herbie Robinson]

That patch is wrong.  The correct patch has been submitted and checked
on the QEMU mailing lists

(http://patchwork.ozlabs.org/patch/737446/).

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Title:
  sgabios outputs incorrect video modes

Status in QEMU:
  New
Status in sgabios package in Ubuntu:
  New

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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1670509/+subscriptions

[Qemu-devel] [Bug 1670509] Re: sgabios outputs incorrect video modes

[Nathan Rennie-Waldock]

Any chance of getting this patch included?
I've deleted the incorrect patch and attached the correct one (taken from QEMU's sgabios repo).

** Patch removed: "0001-SGABIOS-fix-wrong-video-attrs-for-int-10h-ah-13h.patch"
   https://bugs.launchpad.net/ubuntu/+source/sgabios/+bug/1670509/+attachment/4834118/+files/0001-SGABIOS-fix-wrong-video-attrs-for-int-10h-ah-13h.patch

** Patch added: "0001-SGABIOS-fix-wrong-video-attrs-for-int-10h-ah-13h.patch"
   https://bugs.launchpad.net/ubuntu/+source/sgabios/+bug/1670509/+attachment/5019029/+files/0001-SGABIOS-fix-wrong-video-attrs-for-int-10h-ah-13h.patch

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Title:
  sgabios outputs incorrect video modes

Status in QEMU:
  New
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.

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 1670509] Re: sgabios outputs incorrect video modes

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: sgabios (Ubuntu)
       Status: New => Confirmed

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Title:
  sgabios outputs incorrect video modes

Status in QEMU:
  New
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.

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 1670509] Re: sgabios outputs incorrect video modes

[Thomas Huth]

Looks like the fix has been included in QEMU's sgabios repository here:

https://git.qemu.org/?p=sgabios.git;a=commitdiff;h=cbaee52287e5f32373181cf

And the binary in the QEMU repository has been updated here:

 https://git.qemu.org/?p=qemu.git;a=commitdiff;h=c8c33fca88fc3ab8a5e4b

So this fix is included in QEMU since version 2.10.


** Changed in: qemu
       Status: New => Fix Released

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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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1670509/+subscriptions

[Qemu-devel] [Bug 1670509] Re: sgabios outputs incorrect video modes

[Nathan Rennie-Waldock]

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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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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1670509/+subscriptions

[Qemu-devel] [Bug 1670509] Re: sgabios outputs incorrect video modes

[Herbie Robinson]

I believe QEMU has handed ownership of this off to coreboot.  Which
makes sense.

https://review.coreboot.org/cgit/sgabios.git

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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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1670509/+subscriptions