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[Bug 1583949] Re: Unity8 falls back to software rendering on Intel GPUs [intel_miptree_blit: Can't use hardware blitter from MESA_FORMAT_R8G8B8A8_UNORM to MESA_FORMAT_A_UNORM8, falling back. intelCopyTexSubImage - fallback to swrast]

To: ubuntu-sdk-bugs@xxxxxxxxxxxxxxxxxxx
From: Daniel van Vugt <daniel.van.vugt@xxxxxxxxxxxxx>
Date: Fri, 22 Jul 2016 03:56:22 -0000
Reply-to: Bug 1583949 <1583949@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Also affects: canonical-devices-system-image
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1583949

Title:
  Unity8 falls back to software rendering on Intel GPUs
  [intel_miptree_blit: Can't use hardware blitter from
  MESA_FORMAT_R8G8B8A8_UNORM to MESA_FORMAT_A_UNORM8, falling back.
  intelCopyTexSubImage - fallback to swrast]

Status in Canonical System Image:
  New
Status in qtdeclarative-opensource-src package in Ubuntu:
  New
Status in qtubuntu package in Ubuntu:
  New
Status in unity8 package in Ubuntu:
  New

Bug description:
  Unity8 falls back to software rendering, confirmed the same error on
  both low-end and high-end Intel graphics: Diamondville Atom N270
  netbook and Haswell i7-4770 desktop:

  intel_miptree_blit: Can't use hardware blitter from MESA_FORMAT_R8G8B8A8_UNORM to MESA_FORMAT_A_UNORM8, falling back.
  intelCopyTexSubImage - fallback to swrast

  Noticed in unity8.log after adding environment INTEL_DEBUG=perf

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