Red Hat Bugzilla – Bug 964125
lightdm-gtk is able to use backgrounds only in a very specific formats
Last modified: 2014-01-07 01:51:11 EST
Created attachment 749287 [details]
Patch which allows expected background setting
Description of problem:
Attempts to configure in /etc/lightdm/lightdm-gtk-greeter.conf a background other than default usually end up with a black screen surrounding a greeter box. For reasons not clear to me only PNG pictures with an alpha channel are acceptable (even if neither docs nor source seem to imply that this is the case).
OTOH "one-liner" patch, attached, make all kind of picture formats usable so one can use, for example, a JPEG format photo for a background and it displays
Version-Release number of selected component (if applicable):
all the time (but see below)
In my experience so far this afflicts, for mysterious reasons, only 32-bit binaries and the same pictures which will give a black lightdm-gtk background there will work just fine as expected on x86_64 system
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lightdm-gtk-1.6.1-2.fc20 does not seem to suffer from the described affliction. As a matter of fact sources of lightdm-gtk-1.6.1 include a code like the one from an attachment to this report although in a slightly different location.