Christopher, *-rc versions are the release Candidates, once I installed it (http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9-rc5) to check the same bug (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1641152) in November and ended up without WiFi. I can't work on *-rc.
The bug reproduced after the idle state, laptop lid closing or waking up from the sleeping mode with frequency about once per ~20-30 such actions. The probability seems to be higher when there are more opened windows and external monitor is plugging. In fact, the last 2 issues appeared on plugging the external monitor after the sleep mode. However the bug sometimes (about twice during 4 months) reproduced even on pure laptop without any external devices. I think that you don't have many reports about this bug only because the reporting should be done manually. Moreover, it's extremely hard for an ordinary user to perform such reporting when the UI is totally broken and apport-collect doesn't always success to report even if it was called (as nico mentioned, and I also had the same issue with the apport-collect). --- Info about the kernels: [a few older kernels (< 4.4.0-50) have the UI scrambling issue] -4.4.0-51 - OK: UI scrambling has never occurred, but sometimes (when UI scrambling occurs on another kernels) on this kernel system windows become non-sensitive to the mouse clicks: shortcuts on the desktop are clicked behind the foreground window instead of it. This can be fixed by closing and reopening the window (which does not help on another kernels with the UI scrambling issue). On this kernel the windows can always be moved using the title panel (the top bar of the window) even when the remained part of the [foreground] window is not sensitive (transparent for the mouse clicks). -4.4.0-53, 4.4.0-57, 4.4.0-59 - UI scrambling issue - 4.9.3-040903 - under the evaluation. It survived the stress testing without any issues: intentional subsequent lid closing, laptop suspending and external monitor plugging (up to 20 times). Now is under the "working" testing as my default working kernel. -- 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/1651520 Title: Scrambled UI: Text in the Unity windows disappears/mixed after the resume from the screen idle state Status in linux package in Ubuntu: Incomplete Bug description: Text in Unity windows becomes a total mess after suspending and waking up Ubuntu 16.04. Text content in most of system and native windows are scrambled including terminal, nautilus, native apps EXCEPT Java apps (browsers and LibreOffice work fine). I had this issue multiple times, but it is not always reproducible. This bug occurs in linux-image-generic 4.4.0.53. It does not appear with linux-image-extra-4.4.0-51-generic 4.4.0-51.72 amd64. --- ApportVersion: 2.20.1-0ubuntu2.4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: lav 2950 F.... pulseaudio /dev/snd/controlC0: lav 2950 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 16.04 EcryptfsInUse: Yes InstallationDate: Installed on 2014-10-25 (801 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-4.4.0-57-generic root=UUID=daa4b3a5-47b3-4c16-a1de-2dde0c540c4a ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.4.0-57.78-generic 4.4.35 RelatedPackageVersions: linux-restricted-modules-4.4.0-57-generic N/A linux-backports-modules-4.4.0-57-generic N/A linux-firmware 1.157.6 Tags: xenial Uname: Linux 4.4.0-57-generic x86_64 UpgradeStatus: Upgraded to xenial on 2016-09-11 (114 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/1651520/+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
