Would it be possible for you to test the latest upstream stable kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.4 stable kernel[0].
If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.68 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Also affects: linux (Ubuntu Xenial) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Xenial) Importance: Undecided => Medium ** Changed in: linux (Ubuntu Xenial) Status: New => Incomplete ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete ** Tags added: kernel-da-key -- You received this bug notification because you are a member of नेपाली भाषा समायोजकहरुको समूह, which is subscribed to Xenial. Matching subscriptions: Ubuntu 16.04 Bugs https://bugs.launchpad.net/bugs/1689517 Title: Displayport daisy chained displays get recognized as the same Status in linux package in Ubuntu: Incomplete Status in linux source package in Xenial: Incomplete Bug description: Hi, I'm using Ubuntu 16.04.2 LTS. Since I upgraded to 4.4.0-77, my daisy chained displays seem to get recognized as the same. Before, I've been using 4.4.0-72. Booting the older Kernel using grub also still works. I'm using two Dell U2715H Displays daisy chained. (DP1-1 and DP1-8) Both with 2560x1440px. Simultaneously, I use my Notebook Display with 1920x1080px. (eDP1) I have a script, which I run manually after startx, which sets up my environment. It does: xrandr --output DP1-1 --mode 2560x1440 xrandr --output DP1-8 --mode 2560x1440 xrandr --output DP1-8 --left-of eDP1 xrandr --output DP1-1 --left-of DP1-8 On 4.4.0-77 both, DP1-1 and DP1-8 show the same picture (left-of eDP1); whereas on 4.4.0-72, DP1-1 shows the picture left of DP1-8, and DP1-8 shows the picture left of eDP1 as expected. If I take a screenshot using xfce4-screenshooter, everything seems fine. I attached the output from xrandr on both kernels, screenshots from both pictures and reference pictures taken with my camera for you to see what actually happens. Thanks. Screen 0: minimum 8 x 8, current 7040 x 1440, maximum 32767 x 32767 eDP1 connected 1920x1080+5120+0 (normal left inverted right x axis y axis) 309mm x 173mm 1920x1080 60.05*+ 59.93 1680x1050 59.95 59.88 1600x1024 60.17 1400x1050 59.98 1600x900 60.00 1280x1024 60.02 1440x900 59.89 1280x960 60.00 1368x768 60.00 1360x768 59.80 59.96 1152x864 60.00 1280x720 60.00 1024x768 60.00 1024x576 60.00 960x540 60.00 800x600 60.32 56.25 864x486 60.00 640x480 59.94 720x405 60.00 640x360 60.00 DP1 disconnected (normal left inverted right x axis y axis) DP1-1 connected 2560x1440+0+0 (normal left inverted right x axis y axis) 597mm x 336mm 2560x1440 59.95*+ 2048x1152 60.00 1920x1200 59.88 1920x1080 60.00 50.00 59.94 30.00 25.00 24.00 29.97 23.98 1600x1200 60.00 1680x1050 59.95 1280x1024 75.02 60.02 1200x960 59.99 1152x864 75.00 1280x720 60.00 50.00 59.94 1024x768 75.08 60.00 800x600 75.00 60.32 720x576 50.00 720x480 60.00 59.94 640x480 75.00 60.00 59.94 720x400 70.08 DP1-8 connected 2560x1440+2560+0 (normal left inverted right x axis y axis) 597mm x 336mm 2560x1440 59.95*+ 2048x1152 60.00 1920x1200 59.88 1920x1080 60.00 50.00 59.94 30.00 25.00 24.00 29.97 23.98 1600x1200 60.00 1680x1050 59.95 1280x1024 75.02 60.02 1200x960 59.99 1152x864 75.00 1280x720 60.00 50.00 59.94 1024x768 75.08 60.00 800x600 75.00 60.32 720x576 50.00 720x480 60.00 59.94 640x480 75.00 60.00 59.94 720x400 70.08 HDMI1 disconnected (normal left inverted right x axis y axis) HDMI2 disconnected (normal left inverted right x axis y axis) VGA1 disconnected (normal left inverted right x axis y axis) VIRTUAL1 disconnected (normal left inverted right x axis y axis) ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-77-generic 4.4.0-77.98 ProcVersionSignature: Ubuntu 4.4.0-77.98-generic 4.4.59 Uname: Linux 4.4.0-77-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: florian 2980 F.... pulseaudio /dev/snd/pcmC1D0c: florian 2980 F...m pulseaudio /dev/snd/pcmC1D0p: florian 2980 F...m pulseaudio /dev/snd/controlC1: florian 2980 F.... pulseaudio Date: Tue May 9 11:27:40 2017 HibernationDevice: RESUME=/dev/mapper/data-swap InstallationDate: Installed on 2015-08-01 (646 days ago) InstallationMedia: Ubuntu-Server 15.04 "Vivid Vervet" - Release amd64 (20150422) MachineType: Notebook W740SU ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-77-generic.efi.signed root=/dev/mapper/system-system ro RelatedPackageVersions: linux-restricted-modules-4.4.0-77-generic N/A linux-backports-modules-4.4.0-77-generic N/A linux-firmware 1.157.8 SourcePackage: linux UpgradeStatus: Upgraded to xenial on 2016-06-12 (330 days ago) dmi.bios.date: 08/13/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 4.6.5 dmi.board.asset.tag: Tag 12345 dmi.board.name: W740SU dmi.board.vendor: Notebook dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Notebook dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd08/13/2013:svnNotebook:pnW740SU:pvrNotApplicable:rvnNotebook:rnW740SU:rvrNotApplicable:cvnNotebook:ct9:cvrN/A: dmi.product.name: W740SU dmi.product.version: Not Applicable dmi.sys.vendor: Notebook To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1689517/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~group.of.nepali.translators Post to : group.of.nepali.translators@lists.launchpad.net Unsubscribe : https://launchpad.net/~group.of.nepali.translators More help : https://help.launchpad.net/ListHelp
