Release description

The 2014Q4 contains many fixes and improvements, mainly for Broadwell. It also contains preparation for Skylake.

Xf86-video-intel has been updated with DRI3 disabled by default. During 2014Q3 validation many blocking bugs related to DRI3 was found so xf86-video-intel didn't get updated because DRI3 was enabled by default at 2.99.915. Now with DRI3 disabled we can update xf86-video-intel again.

Highlighted new features or fixed bugs

Kernel

• Universal plane support

• DSI support

• Backlight and power sequencer fixes

• MMIO based flips

• Plane rotation support

• Runtime PM for DPMS off

• S0ix support

• Tuned the rps boost logic and added support for Cherryview (Braswell)

• Prearations for Skylake

• Cherryview fixes

• Preparation for DRRS

• Full PPGTT support into shape

• Basic support for execlists command submission

• Vblank handling code revamped

• 1 critical S4 bug (bug 65496) that existed on 2014Q3  is fixed.

• 4 PM bugs are fixed: 78687, 81322, 81412 and 82939.

Complete and detailed list can be found at Maintainer's (Daniel Vetter) announcements: 

Neat drm/i915 stuff for 3.17

Neat drm/i915 stuff for 3.18

2D Driver

• Broadwell fixes and improvements

• Fix a rendering issue with output rotation and software fallbacks.  https://bugs.freedesktop.org/show_bug.cgi?id=84653

• Enable MST discovery even without udev support https://bugs.freedesktop.org/show_bug.cgi?id=84718

• Fix TearFree operation after the GPU is wedged https://bugs.freedesktop.org/show_bug.cgi?id=85058

• Fix projective sampling on gen6+.

• Fix rendering and corruption with gen8.  

  • ​https://bugs.freedesktop.org/show_bug.cgi?id=84958

  • https://bugs.freedesktop.org/show_bug.cgi?id=83207

  • https://bugs.freedesktop.org/show_bug.cgi?id=79053

  • https://bugs.freedesktop.org/show_bug.cgi?id=81583

• Fix crash when using Xinerama. https://bugs.freedesktop.org/show_bug.cgi?id=87207

• Fix rendering of right-to-left or bottom-to-top PolySegments in UXA

• Handle rotated scanouts that are all clear correctly. The region to update was not being computed correctly, overdrawing the wrong CRTC.  https://bugs.freedesktop.org/show_bug.cgi?id=81820

• Reset cursor images after rotation and size changes

  • ​https://bugs.freedesktop.org/show_bug.cgi?id=81886

  • https://bugs.freedesktop.org/show_bug.cgi?id=82273

  • https://bugs.freedesktop.org/show_bug.cgi?id=82337

• Handle stale DRI2 buffers and Client errors more gracefully

• Fallback if we fail to render a glyph onto a too-large surface, e.g. direct rendering of glyphs onto extended desktops with gen2/gen3.  https://bugs.archlinux.org/task/40949

• Honour the Primary option from xorg.conf and mark that as the RandR primary.

  • https://bugs.freedesktop.org/show_bug.cgi?id=82193

  • https://bugs.freedesktop.org/show_bug.cgi?id=82205

• Fix another Client-Window DRI2 close race https://bugs.freedesktop.org/show_bug.cgi?id=82979

• Fix incorrect discarding of GPU damage when copying over the TearFree scanout - which caused a flicker in rapidly updated elements (like simple video panes). https://bugs.freedesktop.org/show_bug.cgi?id=81973

• Do not throw away damage if there is no redundant copy https://bugs.freedesktop.org/show_bug.cgi?id=79992

• Check clipping on PolyRect before discarding the clipped damage https://bugs.freedesktop.org/show_bug.cgi?id=79992

• Fix incoherent choice of source bo when constructing 8x8 tiles, incorrect pattern origin when extracting, and then fix the alignment of colour patterns for BLT operations https://bugs.freedesktop.org/show_bug.cgi?id=80033

• Disable blending with the render engine on snoopable buffers https://bugs.freedesktop.org/show_bug.cgi?id=80253

• Restore throttling to prevent client lag under heavy GPU load https://bugs.freedesktop.org/show_bug.cgi?id=77436

• Use ClientGone for notifications on shared DRI2 windows to prevent rare crashes due to use-after-free of the swap requests https://bugs.freedesktop.org/show_bug.cgi?id=80157

• Ensure the mmaped CPU bo is idle before migrating damage  https://bugs.freedesktop.org/show_bug.cgi?id=80560

• Fix incorrect clipping by the render engine for large DRI2 windows

• Ensure that the aperture tiling fallbacks are bounded

• Validate parameter to xf86-video-intel-backlight-helper more carefully (CVE-2014-4910)

• Light up all connected outputs, even if their status is unknown, on takeover from fbcon. This prevents loss of display after a resume on recent kernels, for example. https://bugs.freedesktop.org/show_bug.cgi?id=77768

• Show the video overlay (when supported by the hardware) across all outputs. https://bugs.freedesktop.org/show_bug.cgi?id=77802

• Do not discard damage when performing "BLT" spans inplace with the CPU.

• Avoid discarding IO buffers too early during their preparation for a new batch https://bugs.freedesktop.org/show_bug.cgi?id=79238

• Fix fallback handling for displaying large scaled framebuffers (that are too large to be scaled by the GPU in a single pass) https://bugs.freedesktop.org/show_bug.cgi?id=79320

• Listen to external modifications of backlight value and propagate the notifications to RandR clients.

• ACPI keypresses to change the backlight correctly. https://bugs.freedesktop.org/show_bug.cgi?id=79699

Complete and detailed list can be found at Maintainer's (Chris Wilson) announcements.

3D Driver

• Broadwell improvements

• Cherryview fixes

• GL_KHR_context_flush_control

• Many bug fixes:

  • Bug 79963 - [ILK Bisected]some piglit and ogles2conform cases fail

  • Bug 54372 - GLX_INTEL_swap_event crashes driver when swapping window buffers

  • Bug 78770 - [SNB bisected]Webglc conformance/textures/texture-size-limit.html fails

  • Bug 82846 - [BDW Bisected] Gpu hang when running Lightsmark v2008/Warsow v1.0/Xonotic v0.7/unigine-demos

  • Bug 82929 - [BDW Bisected]glxgears causes X hang

  • Bug 82932 - [SNB+ Bisected]Ogles3conform ES3-CTS.shaders.indexing.vector_subscript.vec3_static_loop_subscript_write_direct_read_vertex fails

  • Bug 83080 - [SNB+ Bisected]ES3-CTS.shaders.loops.do_while_constant_iterations.mixed_break_continue_fragment fails

  • Bug 83081 - [BDW Bisected]Piglit spec_ARB_sample_shading_builtin-gl-sample-mask_2 is core dumped

  • Bug 83127 - [ILK Bisected]Piglit glean_texCombine fails

  • Bug 84557 - [HSW] "Emit ELSE/ENDIF JIP with type D on Gen 7" causes Atomic Afterlife and GPU hangs

  • Bug 84777 - [BSW]Piglit spec_glsl-1.50_execution_geometry-basic fails

• 9  bugs that existed on 2014Q3 are fixed: 78774, 78775, 79629, 80076,80247, 82896, 82932, 83127 and 83215

Complete and detailed list can be found at all Mesa's 10.4 release notes.

Media - Libva/Intel-vaapi-driver

Libva 1.5.0 brings the following changes:

• API: add support for HEVC decoding

• API: extend JPEG encoding data structures and add configuration
  attribute for JPEG encoding

• Add support for HEVC decoding and JPEG encoding in VA trace utility

• Fix out of tree builds

• VA/X11: fix BadDrawable issue when calling vaTerminate() after the
  pixmaps have been destroyed

• Add a unit test for JPEG encoding
   

Libva-intel-driver 1.5.0 brings:

•  Add support for Skylake

1. Decoding: H.264/MPEG-2/VC-1/JPEG/VP8/HEVC

2. Encoding: H.264/MPEG-2/JPEG

3. VPP: CSC/scaling/NoiseReduction/Deinterlacing{Bob, MotionAdaptive,
   MotionCompensated}/ColorBalance/STD

• Add support for JPEG encoding on Braswell

• Add enhancement for video post/pre processing

• Fix out of tree builds

Known issues

During this validation Kernel Braswell (Cherryview) couldn't be validated with 3.18 because some non-identified black screens probably caused by BIOS-kernel incompatibility. Since this platform is under preliminary_hw_support flag protection this isn't consider a blocking issue and for all BSW tests uses drm-intel-testing-2014-12-05 was used.

• To Support Skylake on Media,  libdrm requires c19a9867ab35834b0fc6a8b0cb8d19382424ff07

• Some 3D performance regression on BYT-M due to bug 87821.

• Bugs present on this release:

  • Top bug:
    • 86548  - [3.18 regression] Screen tears on xrandr orientation inverted
  • ​Kernel Display:
    • 78426 - [IVB/HSW/BYT]Some subcases of igt/gem_exec_parse fails
    • 85641 - [BSW]DP monitor unable to light up after rotation and hot plug
    • 85890 - [BDW]igt/tools_test + igt/drv_missed_irq_hang sporadically causes *ERROR* Unclaimed register detected
    • 86548 - [3.18 regression] Screen tears on xrandr orientation inverted
    • 86697 - [BSW] GPU hang at the second cycle to execute S4 command
    • 87223 - [BSW] eDP screen is blank when booting with DP display connected
    • 87632 - [PNV] testdisplay -f causes WARNING: check_crtc_state+0x9a9/0x9ff [i915]()
    • 87666 - [BSW] Only DP screen shows text when DP and HDMI screen are connected
  • Kernel - Power
    • 77869 - [BDW/BSW]Some subcases of pm_rps fail - gpu turbo busted
    • 79050 - [PNV/BYT/BDW Regression]igt/kms_flip some subcase fail
    • 85123 - [BDW] FBC is not actually working after start gnome-sesstion desktop
    • 87481 - [BYT]igt/pm_rpm/i2c sporadically fails
    • 87703 - [HSW/BYT/BDW/BSW] PSR feature is disabled by default 
    • 87704 - [HSW/BDW] FBC feature is disabled by default
  • 3D  
    • 87391 - [i965]Piglit shaders_glsl-deriv-varyings fails on Mesa 10.4
  • Xorg
    • 87660 - [PNV/SNB/IVB/BDW/BSW bisected]gnome-session crash when run some APPs(googleearth)
    • 87821 - [BYT Bisected] OglBatch1 performance regression ~20%
  • Cairo
    • 87815 - [BDW,BSW]gnome-session unable to start up on ubuntu14.04 with cairo 1.12.16

Validation Hardware

This release was validated on the following hardware, and part of the test results are published here.

• 5th Generation Intel® Core™ processors with Intel® HD Graphics 6000

• 5th Generation Intel® Core™ processors with Intel® HD Graphics 5500

• 4th Generation Intel® Core™ processors with Intel® Iris™ Pro Graphics 5200

• 4th Generation Intel® Core™ processors with Intel® HD Graphics 5000

• 4th Generation Intel® Core™ processors with Intel® HD Graphics 4600

• 3rd Generation Intel® Core™ processors with Intel® HD Graphics 4000

• 3rd Generation Intel® Core™ processors with Intel® HD Graphics 2500

• 2nd Generation Intel® Core™ processors with Intel® HD Graphics 3000

• 2nd Generation Intel® Core™ processors with Intel® HD Graphics 2000

• Intel® Core™ Processors with Intel® HD Graphics

• Intel® Celeron® N2820 processor with Intel® HD Graphics (Bay Trail)

• Intel® Atom™ N450 with Intel® Graphics Media Accelerator 3150 (Pine Trail)

• Mobile Intel® GM45 Express Chipset