kernel-packages team mailing list archive

[Timo Aaltonen <tjaalton@xxxxxxxxxx>]

Public bug reported:

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/1472070

- 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.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Invalid

** Affects: linux (Ubuntu Vivid)
     Importance: High
     Assignee: Timo Aaltonen (tjaalton)
         Status: In Progress


** Tags: cert-testing-needed

** Also affects: linux (Ubuntu Vivid)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1483320

Title:
  Migrate Broadwell to use i915_bpo

Status in linux package in Ubuntu:
  Invalid
Status in linux source package in Vivid:
  In Progress

Bug description:
  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/1472070

  - 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.

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