As I already mentioned, I am aware that nautilus is triggering the
problem. However, no program should be able to bring down the desktop by
doing bad UI operations. Period.
So wether metacity or Xorg or anything I never even heard of is the
right space to solve this issue is out of my reach, because I don't know
their parts in handling drag and drop operations. The developers would
know.
If you tell me "metacity has no part in drag and drop at all", I guess
Xorg is to blame, so you maybe move the bug there?
** Also affects: nautilus (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1741902
Title:
Drag and drop state may be freezed by rogue application
Status in metacity package in Ubuntu:
New
Status in nautilus package in Ubuntu:
New
Bug description:
I had some issues with nautlilus in the past time, that of cause need
to be resolved by the nautlilus devs, but it turns out that IO freezes
(eg. dropped sftp connections) may freeze nautlilus while drag and
drop operations, and hence freeze metacity in some kind, as d&d seems
to lock some control to the participating applications.
What I do:
Drag a file from nautilus.
What happens:
Nautilus blocks for some reason, eg. dropped sftp connection. The
mouse pointer stays in dragging state after releasing the mouse
button. No drop action is executed. Windows can still be bought to
front by clicking them, but never gain focus and no application
(besides nautlilus I guess, which is stalled) receives clicks or
keystrokes. If at some point nautilus crashes in turn, the system
usability is fully restored. If not, a restart by hard shutdown is
needed to regain control.
What should happen:
If an application fails to commence it's drag and drop interaction,
the action should be canceled on metacity's behalf. Otherwise any
rogue application can stop user interaction down to moving the pointer
around, requiring hard reboot.
Security considerations:
Low. The freezed state seems to block screen locking, and may reveal
an unprotected desktop if the rogue application releases control at
some point, eg. by crashing.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: metacity 1:3.18.7-0ubuntu0.3
ProcVersionSignature: Ubuntu 4.4.0-105.128-generic 4.4.98
Uname: Linux 4.4.0-105-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
CurrentDesktop: GNOME-Flashback:Unity
Date: Mon Jan 8 14:52:41 2018
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-08-23 (503 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64
(20160719)
SourcePackage: metacity
UpgradeStatus: No upgrade log present (probably fresh install)
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