John, as per http://www.mytoshiba.com.au/support/computers/portege/z20t /pt15ba-00500y/download an update to your computer's buggy, insecure, and outdated BIOS is available (2.10). If you update to this following https://help.ubuntu.com/community/BIOSUpdate does it change anything?
For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette . Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. Also, you don't have to create a new bug report. Once the BIOS is updated, if the problem is still reproducible: 1) Please provide the output of the following terminal command (not perform an apport-collect): sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date 2) Please make a comment specifically advising on if there was an improvement or not. 3) Please mark this report Status Confirmed. If it's not reproducible, please mark this as Invalid. Thank you for your understanding. ** Tags added: bios-outdated-2.10 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.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/1575071 Title: Graphics corruption (framebuffer offset) in i915 on 4.4.0 Status in linux package in Ubuntu: Incomplete Bug description: Appeared after upgrading to 16.04 LTS. Mostly happens with switching channels in a full-screen irssi window by using Alt and the number keys (or the top row of the keyboard). Entire screen flickers between normal view, and a semi-arbitary offset view (with the entire screen offset by about 50-100 pixel, wrapping to the other side). Minor irritation to begin with. Eventually lead to the entire screen blanking save for a solid yellow/green line (about 5-10 px wide) on the left, occasionally (~1s) flicking back to the correct contents. Rebooting into 4.2.0 (left over from before the upgrade) appears to have fixed the issue. Hardware: Toshiba Portege z20t - "VGA compatible controller [0300]: Intel Corporation Broadwell-U Integrated Graphics [8086:161e] (rev 09) (prog-if 00 [VGA controller])" Relevant packages (assuming that they weren't captured): - linux-image-4.4.0-21-generic - linux-image-extra-4.4.0-21-generic - (working version is 4.2.0-35) ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-extra-4.4.0-21-generic 4.4.0-21.37 ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5 Uname: Linux 4.2.0-35-generic x86_64 ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: tpg 2401 F.... pulseaudio /dev/snd/controlC0: tpg 2401 F.... pulseaudio CurrentDesktop: Unity Date: Tue Apr 26 17:08:04 2016 HibernationDevice: RESUME=UUID=ab95a533-52f3-4458-96dc-9119684b0ed6 InstallationDate: Installed on 2015-06-19 (312 days ago) InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1) MachineType: TOSHIBA PORTEGE Z20t-B ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-35-generic root=UUID=b6cc139d-95e4-48f1-a3a8-284dbdb3b6fa ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.2.0-35-generic N/A linux-backports-modules-4.2.0-35-generic N/A linux-firmware 1.157 SourcePackage: linux UpgradeStatus: Upgraded to xenial on 2016-04-25 (1 days ago) dmi.bios.date: 01/06/2015 dmi.bios.vendor: TOSHIBA dmi.bios.version: Version 1.60 dmi.board.asset.tag: 0000000000 dmi.board.name: PORTEGE Z20t-B dmi.board.vendor: TOSHIBA dmi.board.version: Version A0 dmi.chassis.asset.tag: 0000000000 dmi.chassis.type: 10 dmi.chassis.vendor: TOSHIBA dmi.chassis.version: Version 1.0 dmi.modalias: dmi:bvnTOSHIBA:bvrVersion1.60:bd01/06/2015:svnTOSHIBA:pnPORTEGEZ20t-B:pvrPT15BA-00500Y:rvnTOSHIBA:rnPORTEGEZ20t-B:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0: dmi.product.name: PORTEGE Z20t-B dmi.product.version: PT15BA-00500Y dmi.sys.vendor: TOSHIBA To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1575071/+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
