** Tags added: latest-bios-f.50 -- 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/1515776
Title: After suspend-resume graphics are sluggish and input lags with displayport connected Status in linux package in Ubuntu: Confirmed Bug description: This bug could be related to 1412730 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1412730 Description of the issue: Booting up with displayport connected to Dell U2415 monitor, graphics and input is responsive, also after logging in. However after resuming from suspend-to-ram, graphics are sluggish and input has lag. Examples: - transition from unity greeter login locked status to unlocked status: 6 seconds (normal 1 second) - transition from clicking dash and getting window: 2-3 seconds (normal <1 second) - starting gedit: 4 seconds (normal <1 second) - mouse lags, sometimes the pointer is still on the left side of the screen, while it should be on the right - input from keyboard lags, about 1-2 seconds (normal no lag) When unplugging the Displayport cable: all lag is gone When plugging displayport back in again: lag is back, same as before This issue only happens after suspend-resume. After a reboot, response of graphics and input is normal So two options to get rid of the lag: unplug DP or reboot. Further investigation: Did a mainline kernel bisect: From 3.13.11-ckt27 (good) to v4.3-wily (bad) First bad is v4.0-rc1-vivid Did a kernel commit bisect: From 3.19 (good) to 4.0-rc1 (bad) first bad commit: [e55bca26188e45f209597abf986c87cc5a49894a] radeon/audio: enable DP audio Commit bisect log is attached My daily baseline is 14.04.3 with HWE-Vivid. But because in the current HWE-Vivid this issue isn't present I'm reporting it via Wily as you can see in the logs. I repeated testing of last good and first bad kernels on both 14.04.3 with HWE-Vivid and 15.10. Exactly the same behaviour. I mention this because if this bug wont be fixed, it will still be there in the upcoming HWE-Wily also. And if thats the case, I won't be able to suspend my laptop without this issue. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: linux-image-4.2.0-18-generic 4.2.0-18.22 ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3 Uname: Linux 4.2.0-18-generic x86_64 ApportVersion: 2.19.1-0ubuntu4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: michiel 1788 F.... pulseaudio /dev/snd/controlC1: michiel 1788 F.... pulseaudio CurrentDesktop: Unity Date: Thu Nov 12 22:08:27 2015 HibernationDevice: RESUME=UUID=d0de679a-8c90-4a25-a84a-8d3c25eb0a10 InstallationDate: Installed on 2015-10-31 (12 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) MachineType: Hewlett-Packard HP EliteBook 8740w ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/@wily/boot/vmlinuz-4.2.0-18-generic root=UUID=f16430cd-a447-4cf2-8f8b-ce233e03d462 ro rootflags=subvol=@wily quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.2.0-18-generic N/A linux-backports-modules-4.2.0-18-generic N/A linux-firmware 1.149.1 SourcePackage: linux UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/07/2014 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: 68CAD Ver. F.50 dmi.board.name: 1520 dmi.board.vendor: Hewlett-Packard dmi.board.version: KBC Version 33.31 dmi.chassis.asset.tag: CNU1152Q9W dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvr68CADVer.F.50:bd07/07/2014:svnHewlett-Packard:pnHPEliteBook8740w:pvr:rvnHewlett-Packard:rn1520:rvrKBCVersion33.31:cvnHewlett-Packard:ct10:cvr: dmi.product.name: HP EliteBook 8740w dmi.sys.vendor: Hewlett-Packard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1515776/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
