Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.20 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'. 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/v4.20-rc2 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1803268 Title: Ubuntu 18.10 after Blank Screen System Will NOT Unblank Status in linux package in Ubuntu: Incomplete Bug description: Toshiba Satellite C650 (embedded Intel HD Graphics 3000) running Xubuntu 18.10. Once the Toshiba's Screen has Blanked, it will not unblank with normal Keystrokes or Mouse Events. My "Work around": Plugging an External Monitor into the Satellite C650's VGA Port, which will then unblank the Toshiba's Screen!!! version.log Ubuntu 4.18.0-10.11-generic 4.18.12 ProblemType: Bug DistroRelease: Ubuntu 18.10 Package: linux-image-4.18.0-10-generic 4.18.0-10.11 ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12 Uname: Linux 4.18.0-10-generic x86_64 ApportVersion: 2.20.10-0ubuntu13 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: houston 2335 F.... pulseaudio CurrentDesktop: XFCE Date: Tue Nov 13 22:42:09 2018 InstallationDate: Installed on 2018-11-01 (12 days ago) InstallationMedia: Xubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.2) MachineType: TOSHIBA Satellite C650 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-10-generic root=UUID=9d27207e-4cea-4a3f-9e73-35d175aa6a19 ro quiet splash vt.handoff=1 RelatedPackageVersions: linux-restricted-modules-4.18.0-10-generic N/A linux-backports-modules-4.18.0-10-generic N/A linux-firmware 1.175 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/21/2011 dmi.bios.vendor: INSYDE dmi.bios.version: 1.30 dmi.board.name: Portable PC dmi.board.vendor: TOSHIBA dmi.board.version: Base Board Version dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: OEM Chassis Manufacturer dmi.chassis.version: OEM Chassis Version dmi.modalias: dmi:bvnINSYDE:bvr1.30:bd11/21/2011:svnTOSHIBA:pnSatelliteC650:pvrPSC2EC-07J001:rvnTOSHIBA:rnPortablePC:rvrBaseBoardVersion:cvnOEMChassisManufacturer:ct10:cvrOEMChassisVersion: dmi.product.name: Satellite C650 dmi.product.sku: PSC2EC-07J001 dmi.product.version: PSC2EC-07J001 dmi.sys.vendor: TOSHIBA To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1803268/+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