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Message #172834
[Bug 1554613]
Here's the dmesg FYI:
$ dmesg|grep i915
[ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-linux-mainline root=UUID=0e20ff18-cf60-41db-b0ec-d752d5df0844 rw cryptdevice=/dev/disk/by-uuid/12f4a4fd-0a88-4327-b272-f3ca8fd5d82d:lvm:allow-discards quiet resume=/dev/disk/by-uuid/886bcda0-2e8a-4068-aba2-664991526834 pcie_aspm=force i915.enable_execlists=0 i915.enable_psr=1
[ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-linux-mainline root=UUID=0e20ff18-cf60-41db-b0ec-d752d5df0844 rw cryptdevice=/dev/disk/by-uuid/12f4a4fd-0a88-4327-b272-f3ca8fd5d82d:lvm:allow-discards quiet resume=/dev/disk/by-uuid/886bcda0-2e8a-4068-aba2-664991526834 pcie_aspm=force i915.enable_execlists=0 i915.enable_psr=1
[ 0.897902] [drm] Finished loading i915/skl_dmc_ver1.bin (v1.23)
[ 0.917624] [drm] Initialized i915 1.6.0 20160229 for 0000:00:02.0 on minor 0
[ 2.644829] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[ 9.329977] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops i915_exit [i915])
[ 24.371605] WARNING: CPU: 0 PID: 884 at drivers/gpu/drm/i915/intel_uncore.c:649 __unclaimed_reg_debug+0x80/0x90 [i915]
[ 24.371669] af_alg dm_crypt dm_mod sd_mod rtsx_pci_sdmmc mmc_core atkbd libps2 crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd ahci libahci xhci_pci libata xhci_hcd rtsx_pci scsi_mod usbcore usb_common i8042 serio i915 video button i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm intel_agp intel_gtt
[ 24.371722] [<ffffffffa013f0e0>] __unclaimed_reg_debug+0x80/0x90 [i915]
[ 24.371731] [<ffffffffa013fb8e>] gen9_read32+0x33e/0x3b0 [i915]
[ 24.371742] [<ffffffffa0149b49>] i915_audio_component_codec_wake_override+0x39/0xb0 [i915]
[ 342.932696] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
--
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https://bugs.launchpad.net/bugs/1554613
Title:
screen flickering on XPS13 9350
Status in Linux:
Incomplete
Status in linux package in Ubuntu:
Triaged
Bug description:
see LP: #1552304
does not affect 4.4.0-8
affects 4.4.0-9 to 4.4.0-16
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-generic 4.4.0.11.12
ProcVersionSignature: Ubuntu 4.4.0-8.23-generic 4.4.2
Uname: Linux 4.4.0-8-generic x86_64
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: tbonfort 1498 F.... pulseaudio
CurrentDesktop: KDE
Date: Tue Mar 8 09:57:12 2016
HibernationDevice: RESUME=UUID=3248e0d7-0dac-4ccc-8982-b5ac5ce6ed5e
InstallationDate: Installed on 2016-01-07 (61 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0c45:670c Microdia
Bus 001 Device 002: ID 0a5c:6412 Broadcom Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Inc. XPS 13 9350
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-8-generic root=UUID=757547b8-d0e4-4eb8-8afd-920b743f99a4 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.4.0-8-generic N/A
linux-backports-modules-4.4.0-8-generic N/A
linux-firmware 1.156
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2016-02-28 (9 days ago)
dmi.bios.date: 01/08/2016
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.2.3
dmi.board.name: 07TYC2
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.2.3:bd01/08/2016:svnDellInc.:pnXPS139350:pvr:rvnDellInc.:rn07TYC2:rvrA01:cvnDellInc.:ct9:cvr:
dmi.product.name: XPS 13 9350
dmi.sys.vendor: Dell Inc.
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References