Comment 33 for bug 1043518

"I would also like to see plymouth debug output from this machine, but I realize that may be difficult to capture if the video is corrupted after boot. By any chance, does switching to vt1 give you uncorrupted video after boot, allowing you to copy files off?"
Assuming that you want this from a normal (with splash) boot ? If so I believe we can do that (vt1), what exactly do you wish?
(a log or whatever