Normally when I encounter a Linux problem my first course of action is to Google for a solution. This time I'm not even sure what to call it. "X Windows scroll problem" and "X Windows bad repaint" don't return any useful information. I'm running Unbuntu Hardy Heron on a Dell Latitude D830. So far the problem has only shown up when it's hooked to the docking station and connected to my Philips CM800 monitor. Since the screens are different dimensions (4:3 and 16:9), it surprised me at first that it worked as well as it did. When I boot it with the monitor attached, it sets the resolution to match the Philips. On The Dell, the bottom of the screen is chopped off. That's OK for my purposes. What's started happening is that window repainting has stopped working for certain actions. When I try to scroll a document in Open Office, the whole thing goes black. If I minimize and restore the window, it's OK. The problem also occurs when I drag a terminal window across the screen. That goes black as well. Again the problem can be fixed by minimize/restore. The first time I encountered this, I figured that X Windows had gotten in a bad state, so I logged off and back on. (This has always been one of my favorite features of Linux; you don't have to reboot to fix a problem with the windowing system.) Now when I log off it never comes back to the log on screen; it just stays black. I end up rebooting it. The last couple of times I have done this, the problem is still there. I've looked in the Xorg log file and all that's in there seems to relate to initialization of the monitors. At some point I will probably get a new monitor (because of the dimensional issues) and give this one to my kid, but I've got no guarantee it won't also happen with the new monitor. Has anyone else encountered this problem? Does it have a name? Thanks in advance,
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