light-locker causes problems with multiple applications

[MoonriseUnicorn]

xubuntu-exp

Affects: xubuntu 16.04

light-locker causes problems with multiple applications (all Firefox related that I've found so far):

- If the flash player is running when you lock the screen, it will crash when you unlock it (best case scenario)

- Sometimes instead of flash player crashing, Firefox becomes completely unresponsive and needs to be force stopped (worst case scenario)

- When running, light-locker blocks Chatzilla from responding to ping requests. As a result, IRC network connections always time out if the screen is locked for any length of time.

Steps to reproduce flash crash (always reproducible):

1. Login to Amazon account with prime service. Play something using the Prime Music web player.
2. Lock the screen. The music will stop playing as expected.
3. Unlock the screen. The flash player will crash (best case scenario), or Firefox will become unresponsive and need a force quit (worst case scenario).

Steps to reproduce the Chatzilla timeout.

1. Start Chatzilla and join an IRC channel.
2. Lock the screen.
3. Some time later, unlock the screen. The connection will have been terminated due to a ping timeout.

Workaround for both problems:

Revert to xscreensaver (uninstall light-locker, install xscreensaver). None of the above issues affect xscreensaver.

Personally, I think xubuntu should revert to xscreensaver as the default until the bugs with light-locker can be resolved. xscreensaver might look dated, but it's reliable, gets the job done, and doesn't crash other applications.

[MoonriseUnicorn (moonriseunicorn)]

Upon further investigation, xscreensaver causes more problems than it solves, mainly with video corruption.

Furthermore, I can no longer confirm that the flash crash is being caused by light-locker and not the nvidia open source driver. I have been unable to reproduce the problem on a system using the open source ATI driver.

[Theo Linkspfeifer (lastonestanding)]

Any news on this one? Did you notice any improvements in Xubuntu 18.04?

[MoonriseUnicorn (moonriseunicorn)]

I actually haven't been using Xubuntu recently and don't have it installed
anywhere right now, so I'm not able to say if this issue has been resolved
or not.

On Fri, Aug 24, 2018 at 4:51 AM Theo Linkspfeifer <
<email address hidden>> wrote:

> Any news on this one? Did you notice any improvements in Xubuntu 18.04?
>
>
> ** Changed in: light-locker (Ubuntu)
> Status: New => Incomplete
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1647435
>
> Title:
> light-locker causes problems with multiple applications
>
> Status in light-locker package in Ubuntu:
> Incomplete
>
> Bug description:
> xubuntu-exp
>
> Affects: xubuntu 16.04
>
> light-locker causes problems with multiple applications (all Firefox
> related that I've found so far):
>
> - If the flash player is running when you lock the screen, it will
> crash when you unlock it (best case scenario)
>
> - Sometimes instead of flash player crashing, Firefox becomes
> completely unresponsive and needs to be force stopped (worst case
> scenario)
>
> - When running, light-locker blocks Chatzilla from responding to ping
> requests. As a result, IRC network connections always time out if the
> screen is locked for any length of time.
>
> Steps to reproduce flash crash (always reproducible):
>
> 1. Login to Amazon account with prime service. Play something using the
> Prime Music web player.
> 2. Lock the screen. The music will stop playing as expected.
> 3. Unlock the screen. The flash player will crash (best case scenario),
> or Firefox will become unresponsive and need a force quit (worst case
> scenario).
>
> Steps to reproduce the Chatzilla timeout.
>
> 1. Start Chatzilla and join an IRC channel.
> 2. Lock the screen.
> 3. Some time later, unlock the screen. The connection will have been
> terminated due to a ping timeout.
>
> Workaround for both problems:
>
> Revert to xscreensaver (uninstall light-locker, install xscreensaver).
> None of the above issues affect xscreensaver.
>
> Personally, I think xubuntu should revert to xscreensaver as the
> default until the bugs with light-locker can be resolved. xscreensaver
> might look dated, but it's reliable, gets the job done, and doesn't
> crash other applications.
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/light-locker/+bug/1647435/+subscriptions
>

[Launchpad Janitor (janitor)]

[Expired for light-locker (Ubuntu) because there has been no activity for 60 days.]