kernel-packages team mailing list archive

[thomas955 <thoehlig@xxxxxxxxxx>]

Hi,

we recently got our new E7450 Notebooks from Dell and encountered the same Problems.
Main Problem - Displays flickering or turn to black at all.
We use 3 Displays 2x externeal via DP / HDMI 1920x1080 + E7450 build in with 1920x1080.

OS is Ubuntu 14.04LTS with Kernel 4.2.0-30-generic.
I also tested few hours ago the latest Kernel 4.5.0-040500rc7-generic but after a few minutes one Display started to flicker again.

The dmesg messag "[drm:gen8_irq_handler [i915]] *ERROR* The master
control interrupt lied (SDE)!" occurs in 4.2 but not in 4.5.

There is another dmesg message in 4.5 that seems to be related to the
i915 driver:

[Di Mär  8 17:51:44 2016] pci_bus 0000:02: Allocating resources
[Di Mär  8 17:51:44 2016] pci_bus 0000:03: Allocating resources
[Di Mär  8 17:51:44 2016] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
[Di Mär  8 17:51:44 2016] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
.
.
.
[Di Mär  8 17:53:14 2016] WARNING: CPU: 0 PID: 1278 at /home/kernel/COD/linux/drivers/gpu/drm/i915/intel_uncore.c:599 hsw_unclaimed_reg_debug+0x69/0x90 [i915]()
[Di Mär  8 17:53:14 2016] Unclaimed register detected after reading register 0x223a0

modinfo i915
filename:       /lib/modules/4.5.0-040500rc7-generic/kernel/drivers/gpu/drm/i915/i915.ko
license:        GPL and additional rights
description:    Intel Graphics
author:         Intel Corporation
author:         Tungsten Graphics, Inc.
firmware:       i915/bxt_dmc_ver1.bin
firmware:       i915/skl_dmc_ver1.bin
firmware:       i915/skl_guc_ver4.bin
srcversion:     A8C37B25F49F03AE77E49D0

Hardware:
E7450 
Graphics: 
00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics (rev 09) (prog-if 00 [VGA controller])
	Subsystem: Dell Device 062e
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 51
	Region 0: Memory at f5000000 (64-bit, non-prefetchable) [size=16M]
	Region 2: Memory at d0000000 (64-bit, prefetchable) [size=256M]
	Region 4: I/O ports at f000 [size=64]
	Expansion ROM at <unassigned> [disabled]
	Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
		Address: fee00018  Data: 0000
	Capabilities: [d0] Power Management version 2
		Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [a4] PCI Advanced Features
		AFCap: TP+ FLR+
		AFCtrl: FLR-
		AFStatus: TP-
	Kernel driver in use: i915


in addition i have a:
03:00.0 3D controller: NVIDIA Corporation GM108M [GeForce 840M]
but its not in use.

If you need more Information ...
Thank you in advance
Thomas

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1488719

Title:
  dmesg shows "[drm:gen8_irq_handler [i915]] *ERROR* The master control
  interrupt lied (SDE)!"

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  On a recent intel NUC using i915 graphics, I get the following errors
  in dmesg:

  [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt
  lied (SDE)!

  There are two monitors connected to this box, one with mini-
  HDMI->HDMI, one with mini-DP->HDMI cable.

  Maybe related:

  https://bugs.freedesktop.org/show_bug.cgi?id=80896

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-generic 3.19.0.26.25
  ProcVersionSignature: Ubuntu 3.19.0-26.28-generic 3.19.8-ckt4
  Uname: Linux 3.19.0-26-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.3
  Architecture: amd64
  Date: Wed Aug 26 10:07:31 2015
  InstallationDate: Installed on 2015-08-01 (24 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-26-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/linux/+bug/1488719/+subscriptions