** Summary changed: - Migrate Broadwell to use i915_bpo + [BDW] VGA output regression on 4.2 (was: Migrate Broadwell to use i915_bpo)
** Description changed: There are several bugs affecting Broadwell generation graphics in the vivid kernel (3.19), but not found in 4.2rc which i915_bpo module is based on. In order to support our OEM partners (and other BDW users) it would make sense to migrate BDW to use i915_bpo instead. The known (public) bugs this would fix are: - screen is black after xrandr rotate command https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1446979 - changing the VT causes flicker https://bugs.freedesktop.org/show_bug.cgi?id=85583 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1450557 - GPU hangs on resume https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1468232 (and dupes, which I believe there are several of) - and some OEM machines can't always hotplug the HDMI output (no public bug AIUI) the migration should not be too risky, since i915_bpo is already used for Braswell which is same generation as (=based on) BDW. + + UPDATE: + + Track VGA output regression here, found in 4.2 and fixed upstream by + + commit 6fa2d197936ba0b8936e813d0adecefac160062b + Author: Ander Conselvan de Oliveira <ander.conselvan.de.olive...@intel.com> + Date: Mon Aug 31 11:23:28 2015 +0300 + + i915: Set ddi_pll_sel in DP MST path -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1483320 Title: [BDW] VGA output regression on 4.2 (was: Migrate Broadwell to use i915_bpo) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1483320/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
