Hi, an alternative way to reproduce it, is to just wait for screensaver. Only the backlight is off, it is possible to see the image on LCD matrix if you get the angle right.
The system is the by now fairly old Dell XPS M1330, 64 bit kernel, KMS used (and works since 2.6.35), no 3D. There is sadly nothing interesting in dmesg or in XOrg.0.log (attached along with .config anyway). The repo's HEAD is at f6614b7bb405a9b35dd28baea989a749492c46b2. -------------- next part -------------- A non-text attachment was scrubbed... Name: dmesg Type: application/octet-stream Size: 57059 bytes Desc: not available URL: <http://lists.freedesktop.org/archives/dri-devel/attachments/20101111/4a09565b/attachment-0002.obj> -------------- next part -------------- A non-text attachment was scrubbed... Name: Xorg.0.log.old Type: application/x-trash Size: 25764 bytes Desc: not available URL: <http://lists.freedesktop.org/archives/dri-devel/attachments/20101111/4a09565b/attachment-0001.old> -------------- next part -------------- A non-text attachment was scrubbed... Name: .config Type: application/octet-stream Size: 76521 bytes Desc: not available URL: <http://lists.freedesktop.org/archives/dri-devel/attachments/20101111/4a09565b/attachment-0003.obj>