Public bug reported: This is part of the master bug 824099
When connecting an external monitor, external screen is entirely black, except for the top panel, and the built-in display shows a "dead zone" on the top fourth of the screen, while the bottom 3/4ths are alive and well. I'm attaching a screenshot of the internal display of an affected Intel machine. Affected systems and GPUs: Dell Vostro 1014 (Intel Mobile 4 Series) Dell Vostro 1015 (Intel Mobile 4 Series) Lenovo Thinkpad Edge 11 (Intel Arrandale) Lenovo Thinkpad Edge 15 (Intel Arrandale) Lenovo Thinkpad SL410 (Intel Mobile 4 Series) Lenovo Thinkpad L412 (Intel Arrandale) Dell Vostro 1520 (Intel Mobile 4 Series) Dell Vostro 1720 (Intel Mobile 4 Series) Dell Inspiron 1545 (Intel Mobile 4 Series) Dell Vostro 3300 (Intel Arrandale) Dell Vostro 3500 (Intel Arrandale) Dell Vostro 3700 (Intel Arrandale) Toshiba Tecra A11/M11 (Intel Arrendale) Dell Latitude 13 (Intel Mobile 4 Series) Dell Vostro 3400 (Intel Arrandale) Dell Vostro V13 (Intel Mobile 4 Series) Dell Vostro 3500 (Intel Arrandale) Dell Vostro V13 (Intel Mobile 4 Series) Dell Vostro 3700 (Intel Arrandale) Toshiba Tecra R700 (Intel Arrandale) Dell Inspiron 15R (Intel Arrandale) HP ProBook 6550b (Intel Arrandale) ** Affects: compiz (Ubuntu) Importance: Critical Assignee: Jay Taoko (jaytaoko) Status: Triaged ** Affects: compiz (Ubuntu Oneiric) Importance: Critical Assignee: Jay Taoko (jaytaoko) Status: Triaged ** Tags: blocks-hwcert oneiric ** Changed in: compiz (Ubuntu) Importance: Undecided => Critical ** Changed in: compiz (Ubuntu) Status: New => Triaged ** Changed in: compiz (Ubuntu) Assignee: (unassigned) => Jay Taoko (jaytaoko) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/830952 Title: [Intel Arrandale,Mobile 4 Series] Video corrupted when connecting external displays To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/830952/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs