[i915 Broadwell] Backported bugfixes

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-trusty' to 'verification-done-trusty'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

they've been tested extensively during the past few weeks, and have not caused new issues but fixed bugs; verification done

This bug was fixed in the package linux - 3.13.0-39.66

---------------
linux (3.13.0-39.66) trusty; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1386629

  [ Upstream Kernel Changes ]

  * KVM: x86: Check non-canonical addresses upon WRMSR
    - LP: #1384539
    - CVE-2014-3610
  * KVM: x86: Prevent host from panicking on shared MSR writes.
    - LP: #1384539
    - CVE-2014-3610
  * KVM: x86: Improve thread safety in pit
    - LP: #1384540
    - CVE-2014-3611
  * KVM: x86: Fix wrong masking on relative jump/call
    - LP: #1384545
    - CVE-2014-3647
  * KVM: x86: Warn if guest virtual address space is not 48-bits
    - LP: #1384545
    - CVE-2014-3647
  * KVM: x86: Emulator fixes for eip canonical checks on near branches
    - LP: #1384545
    - CVE-2014-3647
  * KVM: x86: emulating descriptor load misses long-mode case
    - LP: #1384545
    - CVE-2014-3647
  * KVM: x86: Handle errors when RIP is set during far jumps
    - LP: #1384545
    - CVE-2014-3647
  * kvm: vmx: handle invvpid vm exit gracefully
    - LP: #1384544
    - CVE-2014-3646
  * Input: synaptics - gate forcepad support by DMI check
    - LP: #1381815

linux (3.13.0-38.65) trusty; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1379244

  [ Andy Whitcroft ]

  * Revert "SAUCE: scsi: hyper-v storsvc switch up to SPC-3"
    - LP: #1354397
  * [Config] linux-image-extra is additive to linux-image
    - LP: #1375310
  * [Config] linux-image-extra postrm is not needed on purge
    - LP: #1375310

  [ Upstream Kernel Changes ]

  * Revert "KVM: x86: Increase the number of fixed MTRR regs to 10"
    - LP: #1377564
  * Revert "USB: option,zte_ev: move most ZTE CDMA devices to zte_ev"
    - LP: #1377564
  * aufs: bugfix, stop calling security_mmap_file() again
    - LP: #1371316
  * ipvs: fix ipv6 hook registration for local replies
    - LP: #1349768
  * Drivers: add blist flags
    - LP: #1354397
  * sd: fix a bug in deriving the FLUSH_TIMEOUT from the basic I/O timeout
    - LP: #1354397
  * drm/i915/bdw: Add 42ms delay for IPS disable
    - LP: #1374389
  * drm/i915: add null render states for gen6, gen7 and gen8
    - LP: #1374389
  * drm/i915/bdw: 3D_CHICKEN3 has write mask bits
    - LP: #1374389
  * drm/i915/bdw: Disable idle DOP clock gating
    - LP: #1374389
  * drm/i915: call lpt_init_clock_gating on BDW too
    - LP: #1374389
  * drm/i915: shuffle panel code
    - LP: #1374389
  * drm/i915: extract backlight minimum brightness from VBT
    - LP: #1374389
  * drm/i915: respect the VBT minimum backlight brightness
    - LP: #1374389
  * drm/i915/bdw: Apply workarounds in render ring init function
    - LP: #1374389
  * drm/i915/bdw: Cleanup pre prod workarounds
    - LP: #1374389
  * drm/i915: Replace hardcoded cacheline size with macro
    - LP: #1374389
  * drm/i915: Refactor Broadwell PIPE_CONTROL emission into a helper.
    - LP: #1374389
  * drm/i915: Add the WaCsStallBeforeStateCacheInvalidate:bdw workaround.
    - LP: #1374389
  * drm/i915/bdw: Remove BDW preproduction W/As until C stepping.
    - LP: #1374389
  * mptfusion: enable no_write_same for vmware scsi disks
    - LP: #1371591
  * iommu/amd: Fix cleanup_domai...

drm/i915: respect the VBT minimum backlight brightness
drm/i915: extract backlight minimum brightness from VBT

these have not been proposed for utopic, since those did not fix backlight issues for all, and in fact got at least partly reverted in 3.17.

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-utopic' to 'verification-done-utopic'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

Timo, Brad, are proposed packages for trusty LTS enablement stack available and if it's the case, may you tell me which onehave to be installed? I'm currently using linux-signed-image-generic-lts-utopic (UEFI & SecureBoot enable).

This bug was fixed in the package linux - 3.16.0-36.48

---------------
linux (3.16.0-36.48) utopic; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1443946
  * Merged back Ubuntu-3.16.0-34.47 security release

linux (3.16.0-35.46) utopic; urgency=low

  [ Brad Figg ]

  * Release Tracking Bug
    - LP: #1442324

  [ Andy Whitcroft ]

  * [Config] CONFIG_DEFAULT_MMAP_MIN_ADDR needs to match on armhf and arm64
    - LP: #1418140

  [ Chris J Arges ]

  * [Config] CONFIG_PCIEASPM_DEBUG=y
    - LP: #1398544

  [ dann frazier ]

  * [Config] CONFIG_RTC_DRV_EFI=y on arm64
    - LP: #1441291

  [ Upstream Kernel Changes ]

  * Revert "USB: serial: make bulk_out_size a lower limit"
    - LP: #1441317
  * Revert "i2c: core: Dispose OF IRQ mapping at client removal time"
    - LP: #1441317
  * Revert "net: cx82310_eth: use common match macro"
    - LP: #1441317
  * KEYS: request_key() should reget expired keys rather than give
    EKEYEXPIRED
    - LP: #1124250
  * drm/i915/bdw: 3D_CHICKEN3 has write mask bits
    - LP: #1374389
  * drm/i915: call lpt_init_clock_gating on BDW too
    - LP: #1374389
  * drm/i915/bdw: Apply workarounds in render ring init function
    - LP: #1374389
  * drm/i915/bdw: Cleanup pre prod workarounds
    - LP: #1374389
  * drm/i915: Refactor Broadwell PIPE_CONTROL emission into a helper.
    - LP: #1374389
  * drm/i915: Add the WaCsStallBeforeStateCacheInvalidate:bdw workaround.
    - LP: #1374389
  * drm/i915/bdw: Remove BDW preproduction W/As until C stepping.
    - LP: #1374389
  * drm/i915: Rework GPU reset sequence to match driver load & thaw
    - LP: #1384469
  * drm/ast: switch to using CACHED by default for sysram
    - LP: #1420627
  * drm/ast: Add missing entry to dclk_table[]
    - LP: #1420627
  * drm/ast: Add reduced blanking modes for wide screen mode
    - LP: #1420627
  * drm/ast: Try to use MMIO registers when PIO isn't supported
    - LP: #1420627
  * drm/ast: POST chip at probe time if VGA not enabled
    - LP: #1420627
  * drm/ast: Properly initialize P2A base before using it in
    ast_init_3rdtx()
    - LP: #1420627
  * drm/ast: Don't assume DVO enabled means SIL164 on uninitialized chips
    - LP: #1420627
  * drm/ast: Cleanup analog init code path
    - LP: #1420627
  * audit: correctly record file names with different path name types
    - LP: #1439441
  * of: Create of_console_check() for selecting a console specified in
    /chosen
    - LP: #1438585
  * of: Enable console on serial ports specified by /chosen/stdout-path
    - LP: #1438585
  * of: correct of_console_check()'s return value
    - LP: #1438585
  * of: Add bindings for chosen node, stdout-path
    - LP: #1438585
  * of: add optional options parameter to of_find_node_by_path()
    - LP: #1438585
  * of: support passing console options with stdout-path
    - LP: #1438585
  * netfilter: nf_tables: disable preemption when restoring chain counters
    - LP: #1441317
  * netfilter: nf_tables: fix leaks in error path of nf_tables_newchain()
    - LP: #1441317
  * ipvs: rerouting to local clients is not needed anymore
    - LP: #1441317
  * netfilter: nft_compat: fix module refcount underflow
    - LP: #1441317
  * netf...