Yes, this issue has started after the update and was not occurred after I upgraded from 14.04 to 16.04 until some of the latest updates, though it might be pre-last kernel update. It seems, this issue occurs since the latest version(s) of the 4.4.0-47 kernel, definitely in 4.4.0-47.68 and might be in 4.4.0-47.50 but I'm not 100% about that.
--- I tested with the v4.9-rc5 kernel, but it does not support my WiFi network card, so the test was very fast (I can't work without WiFi). The issue has not been reproduced, but it is not always reproducable even on 4.4.0-47.68. So it is not known whether the issue exists in the latest kernel and that is why I've not assigned any tag (kernel-bug-exists-upstream / kernel-fixed-upstream). However, another issues discovered on v4.9-rc5: 1. A laptop does not [always] go to the sleep (susbend) mode on lid closing when the external monitor is plugged, instead the all desktop windows are relocated to the external monitor. 2. When the external monitor is plugged off, the windows are NOT relocated to the laptop display, becoming totally unreachable. --- Peculiarities about the Scrambled UI issue on 4.4.0-47[.68]: all windows of native apps are affected, but not the Java windows (Chrome browser and Libre Office UIs work fine). By the way, besides the Scrambled UI there are a few more issues in the 4.4.0-47[.68]: 1. WiFi network connectivity disappeared (might be when is not used for some time), but the icon (near the time on the top right corner of the destop) shows the connection having fine signal strength. The connectivity restarts when I click on the currently connected network. 2. Sometimes the connectivity disappears totally and the icon clearly shows it. Then I have to restart the network manager service. Particularly this issue seems to be present since I upgraded from 14.04 (since the 4.4.0-43.63 kernel). 3. Often the touchpad stops work at all (for example now) though "xserver-xorg-input-synaptics is already the newest version (1.8.2-1ubuntu3)". This issue also exists since I upgraded from 14.04. The touchpad works fine on v4.9-rc5, though the test was very fast and I'm not sure that this issue is really fixed. ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- 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/1641152 Title: Scrambled UI: Text in the Unity windows disappears/mixed after the resume from the screen idle state Status in linux package in Ubuntu: Confirmed Bug description: Text in Unity windows becomes total mess after suspending and waking up Ubuntu 16.04. I had this issue a few times, but it is not always reproducable. The screenshot is attached, where there is disappeared or mixed text on buttons and window panels (though the copy-paste from such broken terminal works fine). $ uname -a Linux A2XLab 4.4.0-45-generic #66-Ubuntu SMP Wed Oct 19 14:12:37 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux Note, that there is enoguht RAM and no any external monitors are plugged. KiB Mem : 7830196 total, 278792 free, 5922752 used, 1628652 buff/cache KiB Swap: 11999228 total, 8749084 free, 3250144 used. 755228 avail Mem --- ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: lav 6518 F.... pulseaudio /dev/snd/controlC1: lav 6518 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 16.04 EcryptfsInUse: Yes InstallationDate: Installed on 2014-10-25 (750 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) MachineType: LENOVO 20A8S28400 Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-47-generic root=UUID=daa4b3a5-47b3-4c16-a1de-2dde0c540c4a ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.4.0-47.68-generic 4.4.24 RelatedPackageVersions: linux-restricted-modules-4.4.0-47-generic N/A linux-backports-modules-4.4.0-47-generic N/A linux-firmware 1.157.4 Tags: xenial Uname: Linux 4.4.0-47-generic x86_64 UpgradeStatus: Upgraded to xenial on 2016-09-11 (63 days ago) UserGroups: adm cdrom dip docker libvirtd lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 06/06/2014 dmi.bios.vendor: LENOVO dmi.bios.version: GRET39WW (1.16 ) dmi.board.asset.tag: Not Available dmi.board.name: 20A8S28400 dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrGRET39WW(1.16):bd06/06/2014:svnLENOVO:pn20A8S28400:pvrThinkPadX1Carbon2nd:rvnLENOVO:rn20A8S28400:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 20A8S28400 dmi.product.version: ThinkPad X1 Carbon 2nd dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641152/+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