I use latest live-build tool from Debian sid repository to create iso-hybrid images. Plymouth and proprietary Nvidia drivers added to additional packages list. In general plymouth works ok (with uvesafb or vesafb driver), but from time to time strange artifacts appears in the top left desktop corner looks like a black dots or small lines. This artifacts disappear if switch to text console, (tty1 for example) and back to X (tty8 in my case). Investigation of this problem show following results: artifacts are visible when plymouthd doesn't clear video memory after exit. Plymouth store video memory contents if for quit init.d plymouth script uses --retain-splash option. I removed this option, but bug still exist. In my situation plymouthd was in hang or crash state when init.d script send quit command before X start so it can't do deinitialize sequence and it cause problems with nvidia driver. I seems that the reason of such plymouthd behavior is in some actions of live boot config scripts, because there is no artifacts in pure Debian installation (not live) on the same hardware with the same system packages. I can't determine what exactly cause the problems... And this is not hardware problem because this is reproducible on at least 3 different configurations including desktop and laptop machines and affects builds based on wheezy and sid packages versions. Please help me to fix this problem. May be there is known workaround? I can provide plymouth debug logs, live build configuration and etc if needed.
