Hi, I tried to bisect the mainline kernels and found some more tricky steps to reproduce this issue. The issue could be easier to reproduce if we wait for longer (> 20 sec) when the system is trying to get to sleep, and then press the power button to wake it up.
The latest test result is: (mainline) v4.8-rc3 - could reproduce this issue. (mainline) v4.8-rc4 - could reproduce this issue. That is, the latest kernel could still reproduce this issue. I will hide my comment (the comment#4 of this thread) because its test result is outdated. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1619231/comments/4 ** Description changed: Dell XPS 13 9350 on Ubuntu Xenial (CID 201507-18777) [Steps to reproduce this issue] - 1. Install Xenial on this machine - 2. Click the suspend of the up-right indicator of the desktop - 3. The system goes to suspend - 4. After few seconds (at least 10 seconds), press any key of the keyboard to try to wake up the system + 1. Install Xenial on this machine. + 2. Click the suspend of the up-right indicator of the desktop. + 3. The system goes to suspend. + 4. After few seconds (at least 20 seconds), press any key of the keyboard.to try to wake up the system. [Expected result] The system resumes and work normally. [Actually result] 1. The screen is black. - 2. The keyboard back light blinks + 2. The keyboard back light blinks. 3. Sometimes the system would power off (~ 1 out of 5 tries) [Reproducing rate] 4 out of 5. I have not successfully resumed the systems by succeeding to suspend several times ( less than 5 times). + + ------------------------- ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC0: ubuntu 1380 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC0: ubuntu 1380 F.... pulseaudio CurrentDesktop: Unity Date: Thu Sep 1 18:05:24 2016 HibernationDevice: RESUME=UUID=7904faec-081b-4761-841a-12cc4282a403 InstallationDate: Installed on 2016-08-22 (10 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) 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 004: ID 8087:0a2b Intel Corp. - Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub + Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub + Bus 001 Device 003: ID 0c45:670c Microdia + Bus 001 Device 004: ID 8087:0a2b Intel 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-4.4.0-36-generic.efi.signed root=UUID=fe7866c6-8104-457f-837a-38a36b06da30 ro quiet splash vt.handoff=7 RelatedPackageVersions: - linux-restricted-modules-4.4.0-36-generic N/A - linux-backports-modules-4.4.0-36-generic N/A - linux-firmware 1.157 + linux-restricted-modules-4.4.0-36-generic N/A + linux-backports-modules-4.4.0-36-generic N/A + linux-firmware 1.157 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/01/2016 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.3.3 dmi.board.vendor: Dell Inc. dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.3.3:bd03/01/2016:svnDellInc.:pnXPS139350:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct9:cvr: dmi.product.name: XPS 13 9350 dmi.sys.vendor: Dell Inc. ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed ** Tags removed: kernel-fixed-upstream-4.8-rc3 ** Tags added: kernel-bug-exists-upstream ** Tags removed: kernel-fixed-upstream needs-reverse-bisect -- 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/1619231 Title: [Dell XPS 13 9350] suspend failed to resume Status in linux package in Ubuntu: Confirmed Bug description: Dell XPS 13 9350 on Ubuntu Xenial (CID 201507-18777) [Steps to reproduce this issue] 1. Install Xenial on this machine. 2. Click the suspend of the up-right indicator of the desktop. 3. The system goes to suspend. 4. After few seconds (at least 20 seconds), press any key of the keyboard.to try to wake up the system. [Expected result] The system resumes and work normally. [Actually result] 1. The screen is black. 2. The keyboard back light blinks. 3. Sometimes the system would power off (~ 1 out of 5 tries) [Reproducing rate] 4 out of 5. I have not successfully resumed the systems by succeeding to suspend several times ( less than 5 times). ------------------------- ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 1380 F.... pulseaudio CurrentDesktop: Unity Date: Thu Sep 1 18:05:24 2016 HibernationDevice: RESUME=UUID=7904faec-081b-4761-841a-12cc4282a403 InstallationDate: Installed on 2016-08-22 (10 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) 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 004: ID 8087:0a2b Intel 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-4.4.0-36-generic.efi.signed root=UUID=fe7866c6-8104-457f-837a-38a36b06da30 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-36-generic N/A linux-backports-modules-4.4.0-36-generic N/A linux-firmware 1.157 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/01/2016 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.3.3 dmi.board.vendor: Dell Inc. dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.3.3:bd03/01/2016:svnDellInc.:pnXPS139350:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct9:cvr: dmi.product.name: XPS 13 9350 dmi.sys.vendor: Dell Inc. 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