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["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

** Changed in: linux (Ubuntu)
   Importance: Critical => High

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https://bugs.launchpad.net/bugs/1525509

Title:
  regression on 4.3.x: i945/Display corruption (before X, X never
  starts))

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  This laptop works with 4.2.0-19 and fails with 4.3.0-2.

  At boot (before X) the display is corrupt - with the entire screen
  shifted halfway across the screen with the kernel boot text mostly
  readable, just shifted over (and some crud at the top).  X doesn't
  start.  Returning to 4.2.0-19 (as now) and it's fine.

  In the 4.3.0-2 world I see the following warning in the dmesg:
  [   14.118080] WARNING: CPU: 1 PID: 14 at /build/linux-Os09TY/linux-4.3.0/drivers/gpu/drm/drm_atomic.c:491 drm_atomic_check_only+0x46e/0x540 [drm]()
  [   14.119902] Modules linked in: parport_pc ppdev lp parport autofs4 i915 i2c_algo_bit drm_kms_helper syscopyarea firewire_ohci sysfillrect sysimgblt fb_sys_fops psmouse firewire_core sdhci_pci e100 pata_acpi mii sdhci crc_itu_t drm fjes video
  [   14.123614] CPU: 1 PID: 14 Comm: kworker/1:0 Tainted: G        W       4.3.0-2-generic #11-Ubuntu
  [   14.125467] Hardware name: TOSHIBA Equium A100/MPAD-MSAE Customer Reference Boards, BIOS 2.10    10/23/2006
  [   14.127339] Workqueue: events output_poll_execute [drm_kms_helper]
  [   14.129181]  0000000000000000 00000000fe15c8fd ffff8800bb01ba38 ffffffff813d23a4
  [   14.131009]  0000000000000000 ffff8800bb01ba70 ffffffff8107d082 ffff88003590a000
  [   14.132820]  ffff8800b4d61400 0000000000000001 0000000000000000 ffff8800ba182e00
  [   14.134621] Call Trace:
  [   14.136413]  [<ffffffff813d23a4>] dump_stack+0x44/0x60
  [   14.138207]  [<ffffffff8107d082>] warn_slowpath_common+0x82/0xc0
  [   14.139990]  [<ffffffff8107d1ca>] warn_slowpath_null+0x1a/0x20
  [   14.141782]  [<ffffffffc004ab9e>] drm_atomic_check_only+0x46e/0x540 [drm]
  [   14.143569]  [<ffffffffc004ad5d>] ? drm_atomic_set_fb_for_plane+0x2d/0x90 [drm]
  [   14.145374]  [<ffffffffc004ac87>] drm_atomic_commit+0x17/0x60 [drm]
  [   14.147211]  [<ffffffffc01b3ba5>] intel_get_load_detect_pipe+0x3d5/0x530 [i915]
  [   14.149029]  [<ffffffffc01eac8d>] intel_tv_detect+0x13d/0x5f0 [i915]
  [   14.150801]  [<ffffffffc004546e>] ? drm_get_edid+0x3e/0x3f0 [drm]
  [   14.152543]  [<ffffffff817f9d36>] ? schedule_hrtimeout_range_clock.part.23+0xa6/0x150
  [   14.154271]  [<ffffffffc011dd05>] drm_helper_probe_single_connector_modes_merge_bits+0x235/0x4d0 [drm_kms_helper]
  [   14.156025]  [<ffffffffc011dfb3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
  [   14.157757]  [<ffffffffc01297fc>] drm_fb_helper_hotplug_event+0x8c/0x120 [drm_kms_helper]
  [   14.159513]  [<ffffffffc01c39fe>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
  [   14.161261]  [<ffffffffc011d657>] drm_kms_helper_hotplug_event+0x27/0x30 [drm_kms_helper]
  [   14.163031]  [<ffffffffc011d857>] output_poll_execute+0x197/0x1e0 [drm_kms_helper]
  [   14.164808]  [<ffffffff810961aa>] process_one_work+0x1aa/0x440
  [   14.166567]  [<ffffffff8109648b>] worker_thread+0x4b/0x4c0
  [   14.168326]  [<ffffffff81096440>] ? process_one_work+0x440/0x440
  [   14.170068]  [<ffffffff8109c6e8>] kthread+0xd8/0xf0
  [   14.171821]  [<ffffffff8109c610>] ? kthread_create_on_node+0x1e0/0x1e0
  [   14.173577]  [<ffffffff817fae8f>] ret_from_fork+0x3f/0x70
  [   14.175317]  [<ffffffff8109c610>] ? kthread_create_on_node+0x1e0/0x1e0
  [   14.177081] ---[ end trace cdd47054bd68533c ]---

  This is running an up to date Xenial.

  Dave

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.3.0-2-generic 4.3.0-2.11
  ProcVersionSignature: Ubuntu 4.2.0-19.23-generic 4.2.6
  Uname: Linux 4.2.0-19-generic x86_64
  ApportVersion: 2.19.3-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  dg         1407 F.... pulseaudio
  CurrentDesktop: KDE
  Date: Sat Dec 12 12:41:55 2015
  HibernationDevice: RESUME=/dev/mapper/davros--vg-swap_1
  InstallationDate: Installed on 2013-11-15 (756 days ago)
  InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Alpha amd64 (20131115)
  Lsusb:
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: TOSHIBA Equium A100
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-19-generic root=/dev/mapper/hostname--vg-root ro
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-19-generic N/A
   linux-backports-modules-4.2.0-19-generic  N/A
   linux-firmware                            1.154
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: yes
  SourcePackage: linux
  UpgradeStatus: Upgraded to xenial on 2015-11-08 (33 days ago)
  dmi.bios.date: 10/23/2006
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: 2.10
  dmi.board.name: MPAD-MSAE Customer Reference Boards
  dmi.board.vendor: Intel Corporation
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 1
  dmi.chassis.vendor: No Enclosure
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr2.10:bd10/23/2006:svnTOSHIBA:pnEquiumA100:pvrPSAABE-00J008EN:rvnIntelCorporation:rnMPAD-MSAECustomerReferenceBoards:rvrNotApplicable:cvnNoEnclosure:ct1:cvrN/A:
  dmi.product.name: Equium A100
  dmi.product.version: PSAABE-00J008EN
  dmi.sys.vendor: TOSHIBA

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