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#1 2015-12-25 01:16:57

zhou13
Member
Registered: 2009-10-07
Posts: 35

lightdm-gtk-greeter flickers once after 1 second after lightdm starts

I use lightdm to start my i3wm.  However, I notice that my lightdm-gtk-greeter flickers one time after 1 second after lightdm starts.  The flicker also happenes 1 second after my logout.  I tried to delete /etc/lightm and reinstall lightdm and gtk-greeter, but the flicker still happenes.

The function of my lightdm is good.  It just flickers once each time I try to login, which is a little annoying. The flicker is more noticeable when you use a wallpaper in lightdm-gtk-greeter because in the flicker the whole screen turns into black first and then turns back to normal.

The flicker doesn't happenes in lightdm --test-mode.  Neither in lightdm-webkit2-greeter.  I wonder whether any of the users of lightdm-gtk-greeter has the same problem.

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#2 2015-12-25 11:16:28

Raynman
Member
Registered: 2011-10-22
Posts: 1,539

Re: lightdm-gtk-greeter flickers once after 1 second after lightdm starts

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#3 2016-01-05 14:51:35

Serede
Member
Registered: 2014-01-24
Posts: 14

Re: lightdm-gtk-greeter flickers once after 1 second after lightdm starts

I'm having exactly the same problem. Has there been any progress on this issue?

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#4 2016-01-26 22:03:02

Nimlot
Member
Registered: 2013-02-12
Posts: 24

Re: lightdm-gtk-greeter flickers once after 1 second after lightdm starts

This issue is also affecting me. The solution in the thread Raynman linked isn't applicable, because I'm already at the current version of lightdm and lightdm-gtk-greeter.

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#5 2016-05-08 20:12:28

tomxtobin
Member
Registered: 2010-10-07
Posts: 22

Re: lightdm-gtk-greeter flickers once after 1 second after lightdm starts

I'm using Intel integrated graphics (ThinkPad X230). The flicker only started for me after I added i915 to MODULES in my /etc/mkinitcpio.conf file (and rebuilt the init image) to get an early KMS start. After removing i915 from MODULES, the flicker stopped as well.

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#6 2016-05-26 00:16:42

Nimlot
Member
Registered: 2013-02-12
Posts: 24

Re: lightdm-gtk-greeter flickers once after 1 second after lightdm starts

Thanks for the suggestion. I never had i915 in my MODULES and am still getting the issue.

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#7 2016-05-26 12:55:56

mrunion
Member
From: Jonesborough, TN
Registered: 2007-01-26
Posts: 1,938
Website

Re: lightdm-gtk-greeter flickers once after 1 second after lightdm starts

It's bad form for a "me too", but "me too".

No i915 in my modules line either. This is on a new install of Arch (just installed this past weekend). My other box uses LightDM as well, but I haven't checked it since I noticed this new laptop doing this.

If it helps, this laptop is a little Toshiba Radius 12 4K. I don't know if having that large resolution screen is contributory, so I thought I'd throw it out there.


Matt

"It is very difficult to educate the educated."

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#8 2016-05-29 10:48:39

justasug
Member
Registered: 2014-08-03
Posts: 165

Re: lightdm-gtk-greeter flickers once after 1 second after lightdm starts

This has been reported upstream on the LightDM-GTK-Greeter bug tracker HERE

Someone mentioned a "workaround" by using UXA acceleration instead of SNA in comment #9. Workaround in quotes, because the TearFree option doesn't work with UXA. Personally, I'd rather deal with the annoying flash once per logout than having screen tearing until this gets fixed.

Last edited by justasug (2016-05-29 10:49:44)

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#9 2016-06-16 12:03:26

justasug
Member
Registered: 2014-08-03
Posts: 165

Re: lightdm-gtk-greeter flickers once after 1 second after lightdm starts

This resolved itself for me after an update. I can't really tell which update did it, but using:

linux 4.6.2-1
xf86-video-intel 1:2.99.917+662+gb617f80-1
lightdm 1:1.18.1-2
lightdm-gtk-greeter 1:2.0.1-3

fixed it.

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