apparently fixed after kernel upgrade from 4.2.0-10 to -11 now Mesa 11.0.0 works as well as 10.6.3 before. probably the bug may be closed
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/1499055 Title: Wily: Mesa 11.0 causes hang in Intel Xorg driver, reverting to 10.6.3 fixes Status in mesa package in Ubuntu: New Bug description: I am testing Wily on Kubuntu package set with SDDM display manager. After upgrading Mesa packages from 10.6.3 to 11.0.0 I found that graphical logon screen does not appear, and the system freezes with black screen, non-blinking cursor and non-responding keyboard&touchpad I disabled SDDM service in systemctl and could log in to text console. Then I found that 'startx' command freezes the system as well. In dpkg.log I found that Mesa packages were updated last, from v. 10.6.3 to 11.0.0. I downloaded older versions from Ubuntu pool mirror and installed them by dpkg -i. After that, GUI operation was fixed, and I re-enabled SDDM and continue using my system without more significant problems. My system is Acer 1830T, made in 2010, CPU is Core i3-380UM with integrated GPU (Westmere/Ironlake/Arrandale, reported as gen5 in Xorg.0.log). Please investigate and fix this issue. Please ask me if you need more testing or more details. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1499055/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp