[i915_bdw] No screen output on specific LCD panel (DPN: 99DCK))

[Cyrus Lien]

[Summary]
There are no screen output on specific LCD panel (DPN: 99DCK).

[Reproduce Steps]
1. Normal install the system
2. start the system

[Results]:
Only black screen showed up

[Additional Information]
Kernel: 3.13.0-36-generic

[Timo Aaltonen (tjaalton)]

FWIW, same result with latest -52

[Luis Henriques (henrix)]

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!

[Phidias (phidias-chiang)]

Test against with 3.13.0-49 to reproduced the problem, and then installed 3.13.0-53 in trusty-proposed to verify the fix, and it works.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 3.13.0-53.88

---------------
linux (3.13.0-53.88) trusty; urgency=low

  [ Brad Figg ]

  * Release Tracking Bug
    - LP: #1454785

  [ Upstream Kernel Changes ]

  * mmc: card: Don't access RPMB partitions for normal read/write
    - LP: #1454013

linux (3.13.0-53.87) trusty; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1452736

  [ dann frazier ]

  * [Config] CONFIG_{EFI_PARAMS_FROM_FDT,GENERIC_EARLY_IOREMAP,LIBFDT}=y
    - LP: #1441876
  * Move get_dram_base to arm private file
    - LP: #1441876
  * arm64: Implement efi_enabled()
    - LP: #1441876
  * [Config] CONFIG_RTC_DRV_EFI=y on arm64
    - LP: #1441291

  [ Kamal Mostafa ]

  * Fix "mei: me: release hw from reset only during the reset flow"
    - LP: #1450813

  [ Stefan Bader ]

  * SAUCE: vesafb: Set mtrr:3 (write-combining) as default
    - LP: #1434581

  [ Upstream Kernel Changes ]

  * Revert "net: cx82310_eth: use common match macro"
    - LP: #1451900
  * netfilter: nf_conntrack: reserve two bytes for nf_ct_ext->len
    - LP: #1442080
    - CVE-2014-9715
  * add generic fixmap.h
    - LP: #1441876
  * mm: create generic early_ioremap() support
    - LP: #1441876
  * arm64: initialize pgprot info earlier in boot
    - LP: #1441876
  * arm64: add early_ioremap support
    - LP: #1441876
  * arm64: fixmap: fix missing sub-page offset for earlyprintk
    - LP: #1441876
  * efi: create memory map iteration helper
    - LP: #1441876
  * efi: Add get_dram_base() helper function
    - LP: #1441876
  * lib: add fdt_empty_tree.c
    - LP: #1441876
  * doc: efi-stub.txt updates for ARM
    - LP: #1441876
  * efi: add helper function to get UEFI params from FDT
    - LP: #1441876
  * arm64: Add function to create identity mappings
    - LP: #1441876
  * efi: Add shared FDT related functions for ARM/ARM64
    - LP: #1441876
  * arm64: add EFI runtime services
    - LP: #1441876
  * doc: arm: add UEFI support documentation
    - LP: #1441876
  * arm64: efi: add EFI stub
    - LP: #1441876
  * doc: arm64: add description of EFI stub support
    - LP: #1441876
  * efi/arm64: ignore dtb= when UEFI SecureBoot is enabled
    - LP: #1441876
  * arm64: efi: only attempt efi map setup if booting via EFI
    - LP: #1441876
  * PCI: Don't clear ASPM bits when the FADT declares it's unsupported
    - LP: #1441335
  * regmap: Skip read-only registers in regcache_sync()
    - LP: #1448830
  * rtc: ia64: allow other architectures to use EFI RTC
    - LP: #1441291
  * rtc: Disable EFI rtc for x86
    - LP: #1441291
  * mei: me: fix hw ready reset flow
    - LP: #1450813
  * Input: serio - add firmware_id sysfs attribute
    - LP: #1414930
  * Input: i8042 - add firmware_id support
    - LP: #1414930
  * Input: Add INPUT_PROP_TOPBUTTONPAD device property
    - LP: #1414930
  * Input: synaptics - report INPUT_PROP_TOPBUTTONPAD property
    - LP: #1414930
  * Input: synaptics - add a matches_pnp_id helper function
    - LP: #1414930
  * Input: synaptics - change min/max quirk table to pnp-id matching
    - LP: #1414930
  * Input: psmouse - add psmouse_matches_pnp_id helper function
    - LP: #1414930
  * Input: synaptics - split synapt...