[Qemu-devel] [Bug 1654137] [NEW] Ctrl-A b not working in 2.8.0

[Qemu-devel] [Bug 1654137] [NEW] Ctrl-A b not working in 2.8.0

[Paul Goyette]

Public bug reported:

With a recent update from 2.7.0 to 2.8.0 I have discovered that I can no
longer send a "break" to the VM.  Ctrl-A b is simply ignored.  Other
Ctrl-A sequences seem to work correctly.

This is on a NetBSD amd64 system, version 7.99.53, and qemu was
installed on this system from source.

Reverting to the previous install restores "break" capability.

** Affects: qemu
     Importance: Undecided
         Status: New

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Title:
  Ctrl-A b not working in 2.8.0

Status in QEMU:
  New

Bug description:
  With a recent update from 2.7.0 to 2.8.0 I have discovered that I can
  no longer send a "break" to the VM.  Ctrl-A b is simply ignored.
  Other Ctrl-A sequences seem to work correctly.

  This is on a NetBSD amd64 system, version 7.99.53, and qemu was
  installed on this system from source.

  Reverting to the previous install restores "break" capability.

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 1654137] Re: Ctrl-A b not working in 2.8.0

[Andreas Gustafsson]

I am also seeing this problem.  In case it was not clear from Paul's
original report, it affects guests using a serial console.

Also, it is not specific to NetBSD.  I can reproduce it using a Linux
guest on a Linux host, by running the following on a Debian 8 system:

  wget http://landley.net/aboriginal/downloads/old/binaries/1.4.5/system-image-i686.tar.gz
  tar xfz system-image-i686.tar.gz 
  cd system-image-i686
  sh run-emulator.sh 

and typing Control-A b m once the guest has started.

Using qemu 2.1.2, this successfully causes the guest to print a memory
usage summary.  Using current qemu sources from git
(dbe2b65566e76d3c3a0c3358285c0336ac61e757), nothing happens.

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Title:
  Ctrl-A b not working in 2.8.0

Status in QEMU:
  New

Bug description:
  With a recent update from 2.7.0 to 2.8.0 I have discovered that I can
  no longer send a "break" to the VM.  Ctrl-A b is simply ignored.
  Other Ctrl-A sequences seem to work correctly.

  This is on a NetBSD amd64 system, version 7.99.53, and qemu was
  installed on this system from source.

  Reverting to the previous install restores "break" capability.

To manage notifications about this bug go to:
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Re: [Qemu-devel] [Bug 1654137] Re: Ctrl-A b not working in 2.8.0

[Marc-André Lureau]

Hi

On Fri, Jan 6, 2017 at 2:46 PM Andreas Gustafsson <gson@gson.org> wrote:

> I am also seeing this problem.  In case it was not clear from Paul's
> original report, it affects guests using a serial console.
>
> Also, it is not specific to NetBSD.  I can reproduce it using a Linux
> guest on a Linux host, by running the following on a Debian 8 system:
>
>   wget
> http://landley.net/aboriginal/downloads/old/binaries/1.4.5/system-image-i686.tar.gz
>   tar xfz system-image-i686.tar.gz
>   cd system-image-i686
>   sh run-emulator.sh
>
> and typing Control-A b m once the guest has started.
>
> Using qemu 2.1.2, this successfully causes the guest to print a memory
> usage summary.  Using current qemu sources from git
> (dbe2b65566e76d3c3a0c3358285c0336ac61e757), nothing happens.
>
> --
> You received this bug notification because you are a member of qemu-
> devel-ml, which is subscribed to QEMU.
> https://bugs.launchpad.net/bugs/1654137
>
> Title:
>   Ctrl-A b not working in 2.8.0
>
> Status in QEMU:
>   New
>
> Bug description:
>   With a recent update from 2.7.0 to 2.8.0 I have discovered that I can
>   no longer send a "break" to the VM.  Ctrl-A b is simply ignored.
>   Other Ctrl-A sequences seem to work correctly.
>

It could be related to the chardev changes in 2.8, I am bisecting and
looking at it.

thanks


>   This is on a NetBSD amd64 system, version 7.99.53, and qemu was
>   installed on this system from source.
>
>   Reverting to the previous install restores "break" capability.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/qemu/+bug/1654137/+subscriptions
>
> --
Marc-André Lureau

Re: [Qemu-devel] [Bug 1654137] Re: Ctrl-A b not working in 2.8.0

[Marc-André Lureau]

Hi

On Mon, Jan 9, 2017 at 4:39 PM Marc-André Lureau <marcandre.lureau@gmail.com>
wrote:

> Hi
>
> On Fri, Jan 6, 2017 at 2:46 PM Andreas Gustafsson <gson@gson.org> wrote:
>
> I am also seeing this problem.  In case it was not clear from Paul's
> original report, it affects guests using a serial console.
>
> Also, it is not specific to NetBSD.  I can reproduce it using a Linux
> guest on a Linux host, by running the following on a Debian 8 system:
>
>   wget
> http://landley.net/aboriginal/downloads/old/binaries/1.4.5/system-image-i686.tar.gz
>   tar xfz system-image-i686.tar.gz
>   cd system-image-i686
>   sh run-emulator.sh
>
> and typing Control-A b m once the guest has started.
>
> Using qemu 2.1.2, this successfully causes the guest to print a memory
> usage summary.  Using current qemu sources from git
> (dbe2b65566e76d3c3a0c3358285c0336ac61e757), nothing happens.
>
> --
> You received this bug notification because you are a member of qemu-
> devel-ml, which is subscribed to QEMU.
> https://bugs.launchpad.net/bugs/1654137
>
> Title:
>   Ctrl-A b not working in 2.8.0
>
> Status in QEMU:
>   New
>
> Bug description:
>   With a recent update from 2.7.0 to 2.8.0 I have discovered that I can
>   no longer send a "break" to the VM.  Ctrl-A b is simply ignored.
>   Other Ctrl-A sequences seem to work correctly.
>
>
> It could be related to the chardev changes in 2.8, I am bisecting and
> looking at it.
>
>
it's a regression from commit a4afa548fc6dd9842ed866, I will send a fix
asap.


> thanks
>
>
>   This is on a NetBSD amd64 system, version 7.99.53, and qemu was
>   installed on this system from source.
>
>   Reverting to the previous install restores "break" capability.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/qemu/+bug/1654137/+subscriptions
>
> --
> Marc-André Lureau
>
-- 
Marc-André Lureau

[Qemu-devel] [Bug 1654137] Re: Ctrl-A b not working in 2.8.0

[Paul Goyette]

I can confirm that this bug is fixed in qemu 2.8.1

Thanks!

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Title:
  Ctrl-A b not working in 2.8.0

Status in QEMU:
  New

Bug description:
  With a recent update from 2.7.0 to 2.8.0 I have discovered that I can
  no longer send a "break" to the VM.  Ctrl-A b is simply ignored.
  Other Ctrl-A sequences seem to work correctly.

  This is on a NetBSD amd64 system, version 7.99.53, and qemu was
  installed on this system from source.

  Reverting to the previous install restores "break" capability.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1654137/+subscriptions

[Qemu-devel] [Bug 1654137] Re: Ctrl-A b not working in 2.8.0

[Thomas Huth]

http://git.qemu.org/?p=qemu.git;a=commitdiff;h=fb5e19d2e1472e96d

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

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Title:
  Ctrl-A b not working in 2.8.0

Status in QEMU:
  Fix Released

Bug description:
  With a recent update from 2.7.0 to 2.8.0 I have discovered that I can
  no longer send a "break" to the VM.  Ctrl-A b is simply ignored.
  Other Ctrl-A sequences seem to work correctly.

  This is on a NetBSD amd64 system, version 7.99.53, and qemu was
  installed on this system from source.

  Reverting to the previous install restores "break" capability.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1654137/+subscriptions

[Qemu-devel] [Bug 1654137] Re: Ctrl-A b not working in 2.8.0

[Andreas Gustafsson]

This is broken again as of revision
7398166ddf7c6dbbc9cae6ac69bb2feda14b40ac.

Bisection shows it was broken by commit df85a78bf83d85627de27f492e78e73bbbd3df4a,
"char: move mux to its own file".  Somewhat confusingly, this commit predates the fix
(fb5e19d2e1472e96d72d5e4d89c20033f8ab345c), but it is part of a branch that was merged
after the fix, in merge commit 2d6752d38d8acda6aae674a72b72be05482a58eb.  Apparently
this caused a reversion to an old version of the mux code that still has the bug.

Credit for discovering the regression goes to Paul Goyette.

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Title:
  Ctrl-A b not working in 2.8.0

Status in QEMU:
  Fix Released

Bug description:
  With a recent update from 2.7.0 to 2.8.0 I have discovered that I can
  no longer send a "break" to the VM.  Ctrl-A b is simply ignored.
  Other Ctrl-A sequences seem to work correctly.

  This is on a NetBSD amd64 system, version 7.99.53, and qemu was
  installed on this system from source.

  Reverting to the previous install restores "break" capability.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1654137/+subscriptions

[Qemu-devel] [Bug 1654137] Re: Ctrl-A b not working in 2.8.0

[Paul Goyette]

This bug is no longer fixed.  See also bug #1743191

** Changed in: qemu
       Status: Fix Released => In Progress

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Title:
  Ctrl-A b not working in 2.8.0

Status in QEMU:
  In Progress

Bug description:
  With a recent update from 2.7.0 to 2.8.0 I have discovered that I can
  no longer send a "break" to the VM.  Ctrl-A b is simply ignored.
  Other Ctrl-A sequences seem to work correctly.

  This is on a NetBSD amd64 system, version 7.99.53, and qemu was
  installed on this system from source.

  Reverting to the previous install restores "break" capability.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1654137/+subscriptions

[Qemu-devel] [Bug 1654137] Re: Ctrl-A b not working in 2.8.0

[Paul Goyette]

** Changed in: qemu
       Status: In Progress => Confirmed

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Title:
  Ctrl-A b not working in 2.8.0

Status in QEMU:
  Confirmed

Bug description:
  With a recent update from 2.7.0 to 2.8.0 I have discovered that I can
  no longer send a "break" to the VM.  Ctrl-A b is simply ignored.
  Other Ctrl-A sequences seem to work correctly.

  This is on a NetBSD amd64 system, version 7.99.53, and qemu was
  installed on this system from source.

  Reverting to the previous install restores "break" capability.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1654137/+subscriptions

[Qemu-devel] [Bug 1654137] Re: Ctrl-A b not working in 2.8.0

[Andreas Gustafsson]

This regression is still unfixed three months after being reported, and
it's rendering qemu 2.11.1 unusable for my present use case, so I just
reverted my system to the ever reliable qemu 0.15.1.

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Title:
  Ctrl-A b not working in 2.8.0

Status in QEMU:
  Confirmed

Bug description:
  With a recent update from 2.7.0 to 2.8.0 I have discovered that I can
  no longer send a "break" to the VM.  Ctrl-A b is simply ignored.
  Other Ctrl-A sequences seem to work correctly.

  This is on a NetBSD amd64 system, version 7.99.53, and qemu was
  installed on this system from source.

  Reverting to the previous install restores "break" capability.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1654137/+subscriptions

[Qemu-devel] [Bug 1654137] Re: Ctrl-A b not working in 2.8.0

[Daniel Berrange]

@elmarco could you take a look at this possible regression since bisect
claims it was due to the mux refactor

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Title:
  Ctrl-A b not working in 2.8.0

Status in QEMU:
  Confirmed

Bug description:
  With a recent update from 2.7.0 to 2.8.0 I have discovered that I can
  no longer send a "break" to the VM.  Ctrl-A b is simply ignored.
  Other Ctrl-A sequences seem to work correctly.

  This is on a NetBSD amd64 system, version 7.99.53, and qemu was
  installed on this system from source.

  Reverting to the previous install restores "break" capability.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1654137/+subscriptions

[Qemu-devel] [Bug 1654137] Re: Ctrl-A b not working in 2.8.0

[Thomas Huth]

** Changed in: qemu
     Assignee: (unassigned) => elmarco (marcandre-lureau)

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Title:
  Ctrl-A b not working in 2.8.0

Status in QEMU:
  Confirmed

Bug description:
  With a recent update from 2.7.0 to 2.8.0 I have discovered that I can
  no longer send a "break" to the VM.  Ctrl-A b is simply ignored.
  Other Ctrl-A sequences seem to work correctly.

  This is on a NetBSD amd64 system, version 7.99.53, and qemu was
  installed on this system from source.

  Reverting to the previous install restores "break" capability.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1654137/+subscriptions

[Qemu-devel] [Bug 1654137] Re: Ctrl-A b not working in 2.8.0

[Andreas Gustafsson]

Fixed on qemu mainline in 1b2503fcf7b5932c5a3779ca2ceb92bd403c4ee7 -
thanks.  I have backported the fix to pkgsrc as qemu-2.11.1nb3.


** Changed in: qemu
       Status: Confirmed => Fix Committed

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Title:
  Ctrl-A b not working in 2.8.0

Status in QEMU:
  Fix Committed

Bug description:
  With a recent update from 2.7.0 to 2.8.0 I have discovered that I can
  no longer send a "break" to the VM.  Ctrl-A b is simply ignored.
  Other Ctrl-A sequences seem to work correctly.

  This is on a NetBSD amd64 system, version 7.99.53, and qemu was
  installed on this system from source.

  Reverting to the previous install restores "break" capability.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1654137/+subscriptions

[Qemu-devel] [Bug 1654137] Re: Ctrl-A b not working in 2.8.0

[Philippe Mathieu-Daudé]

Hi Andreas, beware... while 1b2503fcf7b5 fixes this bug, it introduces another regression.
I suggest waiting for the release tag before cherry-picking it.

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Title:
  Ctrl-A b not working in 2.8.0

Status in QEMU:
  Fix Committed

Bug description:
  With a recent update from 2.7.0 to 2.8.0 I have discovered that I can
  no longer send a "break" to the VM.  Ctrl-A b is simply ignored.
  Other Ctrl-A sequences seem to work correctly.

  This is on a NetBSD amd64 system, version 7.99.53, and qemu was
  installed on this system from source.

  Reverting to the previous install restores "break" capability.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1654137/+subscriptions

[Qemu-devel] [Bug 1654137] Re: Ctrl-A b not working in 2.8.0

[Peter Maydell]

Commit 1b2503fcf7b5932c reverted by commit 6f660996f1623034. We'll
release 2.12 without a fix for this bug, and look at it for 2.13 and
2.12.1.

https://lists.gnu.org/archive/html/qemu-devel/2018-04/msg02505.html and
followups describe the regression that 1b2503fcf7b5932c caused.


** Changed in: qemu
       Status: Fix Committed => In Progress

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Title:
  Ctrl-A b not working in 2.8.0

Status in QEMU:
  In Progress

Bug description:
  With a recent update from 2.7.0 to 2.8.0 I have discovered that I can
  no longer send a "break" to the VM.  Ctrl-A b is simply ignored.
  Other Ctrl-A sequences seem to work correctly.

  This is on a NetBSD amd64 system, version 7.99.53, and qemu was
  installed on this system from source.

  Reverting to the previous install restores "break" capability.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1654137/+subscriptions

[Qemu-devel] [Bug 1654137] Re: Ctrl-A b not working in 2.8.0

[Thomas Huth]

... and it has been fixed again for 3.0:
https://git.qemu.org/?p=qemu.git;a=commitdiff;h=eeaa6715050ed3f9cbedd32

** Changed in: qemu
       Status: In Progress => Fix Released

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Title:
  Ctrl-A b not working in 2.8.0

Status in QEMU:
  Fix Released

Bug description:
  With a recent update from 2.7.0 to 2.8.0 I have discovered that I can
  no longer send a "break" to the VM.  Ctrl-A b is simply ignored.
  Other Ctrl-A sequences seem to work correctly.

  This is on a NetBSD amd64 system, version 7.99.53, and qemu was
  installed on this system from source.

  Reverting to the previous install restores "break" capability.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1654137/+subscriptions