[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[Launchpad Bug Tracker]

This bug was fixed in the package metacity - 1:3.18.4-0ubuntu0.1

---
metacity (1:3.18.4-0ubuntu0.1) xenial; urgency=medium

  * New upstream bugfix release.
- Fixes crashes (LP: #1573478).
- Fixes performance regressions (LP: #1566157).
  * Drop both patches, applied upstream.

 -- Dmitry Shachnev   Sun, 24 Apr 2016 21:37:01
+0300

** Changed in: metacity (Ubuntu Xenial)
   Status: Fix Committed => Fix Released

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  metacity (flashback) crashes and forces logout

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[Dmitry Shachnev]

Marking as verification-done according to comment 18.

** Tags removed: verification-needed
** Tags added: verification-done

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  metacity (flashback) crashes and forces logout

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[Francesco Monotrsi]

@Bartosz Kosiorek (gang65)
Thanks for the link. I managed to install the updated metacity package from: 
   https://launchpad.net/ubuntu/+source/metacity/1:3.18.4-0ubuntu0.1

and I can confirm that it fixes this bug. I've been using it for a
couple of days without troubles, while previously metacity was crashing
every 2-3 minutes... I think urgency of this updated package should be
increased!

Thanks for the great job

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[Bartosz Kosiorek]

@Francesco Monotrsi
To install metacity from proposed you could follow following instruction
https://wiki.ubuntu.com/Testing/EnableProposed

Unfortunately the place where could be enabled proposed archives was
changed a little bit in Ubuntu 16.04.

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[Francesco Monotrsi]

I'm also affected by this bug. When will the ubuntu archive include the fix?
Can I download/install the fix without having to wait for metacity 3.18.4 to be 
officially released in Ubuntu archives?

Thanks

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[LukeKendall]

I've installed it, but it's not convenient today to logout to restart
metacity.

Note that the problem with the undisplayable firefox window is probably
a separate bug.  I think it relates to a similar problem: I keep an xcb
window at the bottom of the left screen.  It has started vanishing off-
screen, too.  From the animations if I hide and unhide it, it appears to
have dropped below the edge of the displayable area.  I'm not sure what
triggers it.  (I thought perhaps it happens when the scfreen locks, but
I just tried that and it doesn't.)

But for xcb, if I select Maximise from the dock menu for it, I can see
it and use it.  But there's no other way to move its window or resize it
so it's back on screen. I have to kill it and restart it.  If I start a
fresh xcb before killing the old one, it even preserves all the cut
buffers.

I've also seen firefox windows lose all their desktop decorations (re-
sizing edges, top bar with minimise, maximise, close icons), but hiding
and then unhiding it via the window's right-click menu in the dock
reinstates all those parts of the window.

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[Launchpad Bug Tracker]

This bug was fixed in the package metacity - 1:3.18.4-1ubuntu1

---
metacity (1:3.18.4-1ubuntu1) yakkety; urgency=medium

  * Merge with Debian unstable, remaining changes:
- debian/metacity-common.links: Show keybindings in Unity control center.
- debian/metacity-common.gsettings-override: Change the default theme to
  Ambiance.
  * Drop all patches, applied upstream.
  * The new release fixes LP: #1566157, #1573478.

 -- Dmitry Shachnev   Tue, 26 Apr 2016 14:21:16
+0300

** Changed in: metacity (Ubuntu Yakkety)
   Status: Confirmed => Fix Released

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[LukeKendall]

I moved aside the file it was complaining about, which I just mentioned,
so I could attach it here.  However, by the end of this report, it had
been removed by the package system.  I had done this, thinking kit would
keep it safe:

# mv /var/lib/apt/lists/au.archive.ubuntu.com_ubuntu_dists_trusty-
updates_main_i18n_Translation-en /var/lib/apt/lists/aside-
au.archive.ubuntu.com_ubuntu_dists_trusty-updates_main_i18n_Translation-
en

But apparently the package system removes files it doesn't expect to see
there, so I'm sorry, I can't give you the copy I had preserved and
Browsed to (apparently launchpad doesn't up[load the file then, it waits
till you finish filling in the form: bad decision, I guess!

Anyway, for now I've just moved that file aside.  That allowed Synaptic
to run ;properly, and now allows Software Updater to start; but after a
while it reports "Failed to download repository information". Ah, and it
has an "Updates|" tab, so probably it's the "Software & Updates" thing
referred to on the URL provided. (It seems user-unfriendly to name it
with the name that you see after you've found it and started it, not the
name you area presented with to start running it in the first place!)

And I suppose you can work out that that page probably refers to
releases other than Trusty, even though you have to read on to discover
that, rather than communicating that up-front, and not mentioning Xenial
or Yakkety at all.

But that said, there is no "Pre-release updates (xenial-proposed)"
option, so I still don't know how I can comply with the request,
unfortunately!

Ah, what the URL *also* doesn't tell you is that you first need to click over 
to the Developer Options tab and first select:
 Pre-released update (-proposed)

Oh. Good thought, but even enabling that didn't make the new option
appear under the Updates tab.

I then tried closing the updater, and it reported the software list was
now out of date and needed reloading.  After doing that, I got further
error messages:

W:http://dl.google.com/linux/earth/deb/dists/stable/Release.gpg:
Signature by key 4CCA1EAF950CEE4AB83976DCA040830F7FAC5991 uses weak
digest algorithm (SHA1), W:An error occurred during the signature
verification. The repository is not updated and the previous index files
will be used. GPG error: http://extras.ubuntu.com/ubuntu trusty Release:
The following signatures couldn't be verified because the public key is
not available: NO_PUBKEY 16126D3A3E5C1192, E:Failed to fetch
http://dl.google.com/linux/earth/deb/dists/stable/Release  No Hash entry
in Release file
/var/lib/apt/lists/dl.google.com_linux_earth_deb_dists_stable_Release
which is considered strong enough for security purposes, E:Failed to
fetch http://au.archive.ubuntu.com/ubuntu/dists/trusty-
updates/universe/source/Sources.bz2  Hash Sum mismatch, E:Failed to
fetch http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/main
/binary-amd64/Packages.bz2  Hash Sum mismatch, E:Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-
updates/main/binary-i386/Packages.bz2  Hash Sum mismatch, E:Failed to
fetch http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/universe
/binary-amd64/Packages.bz2  Hash Sum mismatch, E:Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/universe/i18n
/Translation-en  Writing more data than expected (235448 > 235322) [IP:
202.158.214.106 80], W:Failed to fetch
http://extras.ubuntu.com/ubuntu/dists/trusty/Release.gpg  The following
signatures couldn't be verified because the public key is not available:
NO_PUBKEY 16126D3A3E5C1192, W:Some index files failed to download. They
have been ignored, or old ones used instead.

Looking under the Authentication tab, all "Trusted software providers" seem 
well out of date.  Clicking Restore Defaults didn't change any of them, however.
I removed the Google line, and over on the Other Software tab, I also removed 
all the lines mentioning Trusty (even though all of them were unchecked, so I 
assumed were not being used).  I also noticed the Google repository was checked 
on the Other Software tab, and after unchecking that and reloading the 
repository information, I still got this error:

W:An error occurred during the signature verification. The repository is
not updated and the previous index files will be used. GPG error:
http://extras.ubuntu.com/ubuntu trusty Release: The following signatures
couldn't be verified because the public key is not available: NO_PUBKEY
16126D3A3E5C1192, E:Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-
updates/universe/source/Sources.bz2  Hash Sum mismatch, E:Failed to
fetch http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/main
/binary-amd64/Packages.bz2  Hash Sum mismatch, E:Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-
updates/main/binary-i386/Packages.bz2  Hash Sum mismatch, E:Failed to
fetch http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/universe
/binary-amd64/Packages.bz2  Hash Sum 

[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[LukeKendall]

The link https://wiki.ubuntu.com/Testing/EnableProposed talks about
Ubuntu 14.04 and something called Softwatre & Updates:

"To enable the proposed archive for Ubuntu 14.04 use the Software &
Updates program and ensure that Pre-release updates (trusty-proposed) is
ticked in the Updates tab."

Is "Software & Updates" the same thing as System Tools -> Administration
-> Update Manager, or Software Updater?

I got a crash when I tried to start Software Updater (it asked if I
wanted to report it as a I relaunched it: but relaunching just crashed
again). When I chose Update Manager, the window appeared then vanished.

I've attached the excerpt from /var/syslog.

I saw a warning a few days ago stating that one of my repositories for
trusty (extensions, IIRC) was not able to be fetched as its signature
was missing or out of date, and so I went into Update Manager and
unchecked the single repository that matched.  That sounds relevant, as
I'm running Ubuntu 16.04.  Also possibly relevant is a red danger-
triangle that has been appearing on the top status/widget bar in the
Flashback/Metacity UI, related to system updates: none of the options
provided via the warning icon's drop-down menu actually worked (I think
the options included: check for updates, install updates), but I was
able to run Synaptic and Mark All Upgrade and then Apply and the red
warning triangle went away following the updates synpatic found and
applied.

Ah, and starting synaptic now reports an error in a more friendly way:

E: Encountered a section with no Package: header
E: Problem with MergeList 
/var/lib/apt/lists/au.archive.ubuntu.com_ubuntu_dists_trusty-updates_main_i18n_Translation-en
E: The package lists or status file could not be parsed or opened.
E: _cache->open() failed, please report.

I'll add another comment and attach that file, too: it looks binary to
me.


** Attachment added: "Errors reported in /var/syslog"
   
https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1573478/+attachment/4647667/+files/syslog-excerpt.txt

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Title:
  metacity (flashback) crashes and forces logout

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[Martin Pitt]

Hello LukeKendall, or anyone else affected,

Accepted metacity into xenial-proposed. The package will build now and
be available at
https://launchpad.net/ubuntu/+source/metacity/1:3.18.4-0ubuntu0.1 in a
few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Also affects: metacity (Ubuntu Xenial)
   Importance: Undecided
   Status: New

** Also affects: metacity (Ubuntu Yakkety)
   Importance: Critical
   Status: Confirmed

** Changed in: metacity (Ubuntu Xenial)
   Status: New => Fix Committed

** Tags added: verification-needed

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  metacity (flashback) crashes and forces logout

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[Martin Pitt]

Dmitry, please upload this to yakkety as well, otherwise this cannot
land in -updates.

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  metacity (flashback) crashes and forces logout

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[LukeKendall]

Hmm, that was weird: similarly to comment #4, I just noticed a Firefox
window lose all its decorations, so to hide it I had to use its icon in
the dock.  But when I unhid it, the decorations were back.  So: weird.
I just thought I'd mention it.

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[Alberto Salvia Novella]

** Changed in: metacity (Ubuntu)
   Importance: Undecided => Critical

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[LukeKendall]

I'm just reporting in that since upgrading metacity using Alberts' PPA,
I have not experienced a further crash. The nearest I came was a screen-
lock which I'm pretty sure I accidentally triggered via a Ctrl+Shift+L.
:-)  Since the frequency was something like every hour or two, I think
that's a very healthy sign.  Thanks, Alberts!

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[Dmitry Shachnev]

** Description changed:

+ [Impact]
+ Metacity can segfault in several cases. It is a regression introduced by 
1:3.18.3-1ubuntu3 upload.
+ 
+ [Test Case]
+ The exact step to get this bug are unknown. Just using Metacity for some time 
may make it crashing. Perhaps doing more WM-related operations (like 
Alt+Tabbing) may speed up triggering it.
+ 
+ [Regression Potential]
+ This fix is tested by several users and seems to not have any regressions.
+ 
+ -
+ 
  After an update 2 or 3 days ago, at random times mid-session, all window
  decorations vanish, then the desktop goes to black (just time/date stamp
  showing IIRC, as at a screen lock), and then I'm presented with a login
  screen again.
  
  I was logging in with Gnome Flashback.  It's been happening several
  times a day, and it's infuriating.
  
  This time I've logged in with the "(Metacity)" option rather than the
  (Flashback)" option, and I'll see if that works.  Otherwise, I'll go
  back to a Window Maker session to get a reliable experience.
  
  I see this in /var/log/kern.log:
  
  Apr 22 18:31:48 pute kernel: [11401.021438] perf interrupt took too long 
(2509 > 2500), lowering kernel.perf_event_max_sample_rate to 5
  Apr 22 18:32:33 pute kernel: [11445.589519] show_signal_msg: 66 callbacks 
suppressed
  Apr 22 18:32:33 pute kernel: [11445.589528] metacity[2447]: segfault at 
1a3359 ip 00426f51 sp 7fff3ed289b8 error 4 in metacity[40+8d000]
  Apr 22 18:32:33 pute gnome-session-binary[1845]: Unrecoverable failure in 
required component metacity.desktop
  Apr 22 18:32:47 pute gnome-session-binary[7282]: Entering running state
  Apr 22 18:33:37 pute gnome-session-binary[8527]: Entering running state
  
  Here are some earlier ones:
  
  Apr 22 15:18:47 pute kernel: [60617.177188] metacity[16270]: segfault at 48 
ip 00426e2e sp 7fff2daf0478 error 4 in metacity[40+8d000]
  Apr 22 15:18:47 pute gnome-session-binary[16198]: Unrecoverable failure in 
required component metacity.desktop
  Apr 22 15:18:58 pute gnome-session-binary[28521]: Entering running state
  Apr 22 15:21:11 pute NetworkManager[802]:   [1461302471.2831] 
ModemManager disappeared from bus
  Apr 22 15:21:52 pute kernel: [0.00] Initializing cgroup subsys cpuset
  
- 
  Apr 22 02:22:23 pute kernel: [14028.678785] show_signal_msg: 27 callbacks 
suppressed
  Apr 22 02:22:23 pute kernel: [14028.678797] metacity[2509]: segfault at 
302e64617074 ip 00466780 sp 7ffca8b8b998 error 4 in 
metacity[40+8d000]
  Apr 22 02:22:28 pute gnome-session-binary[2439]: Unrecoverable failure in 
required component metacity.desktop
  Apr 22 02:22:56 pute gnome-session-binary[9411]: Entering running state
  Apr 22 04:02:03 pute kernel: [20008.941872] metacity[9467]: segfault at 
7f6e008e0018 ip 00426e20 sp 7ffc7090a3c8 error 4 in 
metacity[40+8d000]
  Apr 22 04:02:03 pute gnome-session-binary[9411]: Unrecoverable failure in 
required component metacity.desktop
  Apr 22 04:02:23 pute gnome-session-binary[14247]: Entering running state
  Apr 22 04:15:57 pute kernel: [20843.181807] traps: metacity[14309] general 
protection ip:466530 sp:7ffd40cb18b8 error:0 in metacity[40+8d000]
  Apr 22 04:15:57 pute gnome-session-binary[14247]: Unrecoverable failure in 
required component metacity.desktop
  Apr 22 04:15:57 pute kernel: [20843.493120] QXcbEventReader[15628]: segfault 
at 7ff10d5e7629 ip 7ff10d5e7629 sp 7ff0ff5a5d60 error 14 in 
libes_plugin.so[7ff10d697000+6000]
  Apr 22 04:16:16 pute gnome-session-binary[16198]: Entering running state
- 
  
  Apr 21 22:25:24 pute kernel: [3148119.324731] metacity[2822]: segfault at 
10007 ip 7f8020e83278 sp 7ffdc421c010 error 4 in libc-2.21.so 
(deleted)[7f8020e04000+1c]
  Apr 21 22:25:24 pute gnome-session-binary[2714]: Unrecoverable failure in 
required component metacity.desktop
  Apr 21 22:25:24 pute kernel: [3148119.901802] dconf worker[2727]: segfault at 
8 ip 7f35f3db2481 sp 7f35ea99baa0 error 4 in libglib-2.0.so.0.4706.0 
(deleted)[7f35f3d6b000+10e000]
  Apr 21 22:25:29 pute kernel: [3148124.830996] dbus-daemon[2635]: segfault at 
0 ip 7f10b2934017 sp 77b10518 error 6 in libdbus-1.so.3.14.6 
(deleted)[7f10b2908000+4a000]
  Apr 21 22:25:55 pute gnome-session-binary[19038]: Entering running state
  Apr 21 22:26:28 pute gnome-session-binary[19038]: Entering running state
  Apr 21 22:26:28 pute kernel: [3148183.865201] metacity[19100]: segfault at 48 
ip 00426f51 sp 7ffe2a345168 error 4 in metacity[40+8d000]
  Apr 21 22:26:32 pute gnome-session-binary[19038]: Unrecoverable failure in 
required component metacity.desktop
  Apr 21 22:26:48 pute gnome-session-binary[20075]: Entering running state
  Apr 21 22:27:31 pute gnome-session-binary[20075]: Entering running state
  
  $  lsb_release -rd
  Description:  Ubuntu 16.04 LTS
  Release:  16.04
  $ apt-cache 

[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[LukeKendall]

Okay, I've done that.  I'll log out and back in again.

Actually, I rebooted, as I saw there was a kernel update I hadn't
rebooted after applying.  The reboot turned into the scary kind, for
this Intel NUC, where I had to unplug not only all USB3 drives, but also
the HDMI display before it would display the boot screen. But I'm back
in action.

I'll let you know if there are further problems.

All Firefox windows are correctly decorated now, and the untouchable FF
window on the 2nd monitor is also dispalying and functioning again
properly.

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[LukeKendall]

Okay, I've done that.  I'll log out and back in again.

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[Alberts Muktupāvels]

https://launchpad.net/~albertsmuktupavels/+archive/ubuntu/metacity-3-18

Please use above PPA to upgrade metacity. That is current upstream
version (unreleased) that is supposed to fix few problems. Please report
any problem you see with that version.

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https://bugs.launchpad.net/bugs/1573478

Title:
  metacity (flashback) crashes and forces logout

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[LukeKendall]

Possibly-related: I currently have one Firefox window (only: of 14 FF
windows) that spontaneously lost its canvas management area - all the
outside bits that have the icons to close it, minimise it, resize it
etc.  I'll attach a screenshot.  In addition, when I turned on power to
my secondary monitor (where I had a FF window open with this bug report
and a few other tabs), that window would not display on the 2nd monitor.
In fact, although that FF window appears in the dock, I can't get to it
or see it or work with it in any way - except that if I click on its
icon in the dock, to hide or unhide it, I sometimes see two or three
frames of the hide/unhide animation.  Using alt-mousedown, I can't grab
the window.  I can drag other windows onto the 2nd monitor - it's
working fine - but the bug-report FF window is not being rendered, nor
is it grabbable in any way.

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https://bugs.launchpad.net/bugs/1573478

Title:
  metacity (flashback) crashes and forces logout

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[LukeKendall]

** Attachment added: "Screen shot of a possibly-related problem"
   
https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1573478/+attachment/4643902/+files/FirefoxLostItsDesktopIcons.png

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https://bugs.launchpad.net/bugs/1573478

Title:
  metacity (flashback) crashes and forces logout

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[Bug 1573478] Re: metacity (flashback) crashes and forces logout

[Launchpad Bug Tracker]

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

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

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Title:
  metacity (flashback) crashes and forces logout

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