** Attachment added: "version.log" http://launchpadlibrarian.net/50712119/version.log
** Description changed: I tried to install Lucid on the new Apple Imac27" with ATI radeon HD 4850 video card. After selected "install", the screen goes black. few investigations later, I discovered display output switch to the Mini - Display Port. So, I treid to connect a second screen, and I was right : - just after select "install lucid", the video outuput switch to the - second screen, and the main screen turn black. + Display Port. So, I tried to connect a second screen, and I was right : + just after select "install lucid", the video output switch to the second + screen, and the main screen turn black. I continue my installation using my 2nd screen (connected to the mini display port), and after it, I'm on the desktop. I activate Open radeon - drivers, the works perfectly, but in the second screen. Impossible to - switch to the main screen. It's not reconized, and stay black. + drivers, they works perfectly, but in the second screen. Impossible to + switch to the main screen. It's not recognized, and stay black. I tried proprietary ati drivers (10.6). With them, I can activate my main screen, but they are not better than the open ones : there is a big vsync bug. Actually, It's totally impossible for a normal user to use open ati drievrs on the main screen with an Imac27 and ati radeon 4850 - graphik card. + graphic card. - I think issue is in the kms driver, I tried to desactivate them. Main - screen is reconized, but impossible to turn it on, it stay black, and + I think issue is in the kms driver, I tried to deactivate them. Main + screen is recognized, but impossible to turn it on, it stay black, and Vsync issue re-appear on the second screen. i tried 2.6.32, 2.6.34, 2.6.35 rc1 released, bug is still here. ** Description changed: I tried to install Lucid on the new Apple Imac27" with ATI radeon HD 4850 video card. After selected "install", the screen goes black. few investigations later, I discovered display output switch to the Mini Display Port. So, I tried to connect a second screen, and I was right : just after select "install lucid", the video output switch to the second screen, and the main screen turn black. I continue my installation using my 2nd screen (connected to the mini display port), and after it, I'm on the desktop. I activate Open radeon - drivers, they works perfectly, but in the second screen. Impossible to - switch to the main screen. It's not recognized, and stay black. + drivers, they works perfectly, but in the second screen (Vsync is + perfect, and very smooth using compiz). Impossible to switch to the main + screen. It's not recognized, and stay black. I tried proprietary ati drivers (10.6). With them, I can activate my main screen, but they are not better than the open ones : there is a big vsync bug. Actually, It's totally impossible for a normal user to use - open ati drievrs on the main screen with an Imac27 and ati radeon 4850 + open ati drivers on the main screen with an Imac27 and ati radeon 4850 graphic card. I think issue is in the kms driver, I tried to deactivate them. Main screen is recognized, but impossible to turn it on, it stay black, and - Vsync issue re-appear on the second screen. + Vsync issue re-appear on the second screen. Maybe the open radeon + drivers also got a bug, cause after deactivate them, my main screen is + now recognized on display manager, but impossible after activate it, it + stay black => back to proprietary drivers, and the Vsync issue) i tried 2.6.32, 2.6.34, 2.6.35 rc1 released, bug is still here. -- Imac Radeon HD 4850 switch "Mini Display Port" output during install resulting black screen https://bugs.launchpad.net/bugs/597070 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
