1. Wow ... I got this apport-collect thingy running ... it won't run from any Konsole inside KDE, only the Ctrl+Alt+F1 text console will do. But phew ... it's asking to open a browser for login to ubuntu.com. Well I had to take another photo of the lengthy URL, switch back to X, launch firefox, type it in and allow the live session access to my account ... really intuitive!
2.Once I was playing around with switching between the consoles back and forth and got a soft-lockup only by trying to log in (sorry, no picture of that one). So while the message repeated every 20 seconds or so, I could still switch back and forth via Alt+F1, Alt+F2, Alt+F3, though at some point Alt+F2 stopped working and only Alt+F1, Alt+F3-6 showed distinct consoles. Trying to go to X via Alt+F7 I was stuck in a blank black screen and could not get back to text console. 3. (see screenshot): Once I got a softlockup, while bash was trying to figure out, that apport-collect is not installed by default. Actually the network cable was plugged out at that boot up. I didn't click on anything in the language chooser dialog, just waited for it to come up and switched directly to the console via Ctrl+Alt+F1 and logged in. 4. Right now I'm writing from inside a fully functional live-session. I didn't even need to experiment with nomodeset. The requirement is a true cold boot with about 30 seconds switched off completely. I did this 3 times in a row and it's rock solid. Whereas a cold boot after only a few seconds (really switching off and pressing the power button to start again) or a reboot via Alt+SyReq+b fails reliably (also 3 times in a row). It will go to the select language (English or German doesn't make a difference), then pressing try kubuntu, the screen goes all black (no mouse, no cursor, nothing) and it sits there forever. In addition, it won't accept keyboard commands like Ctrl+Alt+F1 to switch to the console or the good old Ctrl+Alt+Del. The only key combination, I could make work is Alt+SyReq+b, which obviously does not allow to investigate the error any further. So as this is a fresh livesession, that I ran apport-collect, I doubt, there is any error in the logs, because my harddrive is encrypted and the USB stick is mounted readonly. Oh and finally: For the last days, all theses experiments were done with the very same USB-stick. I haven't written anything to it and the md5-checksums are all OK. It's from this iso-image: http://cdimage.ubuntu.com/kubuntu/releases/15.10/release/kubuntu-15.10-desktop-amd64.iso ** Attachment added: "screenshot of soft-lockup even before clicking on try kubuntu (issue 3)" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1509839/+attachment/4508781/+files/IMG_20151029_001157.jpg ** 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/1509839 Title: segfault on start of live session in kactivitymanager / libqt5sql Status in linux package in Ubuntu: Confirmed Bug description: I've installed 15.10 Wily Werewolf to my USB stick via usb-creator and restart the laptop on boot, I'm asked for the language and if I want to install or try a live session I select try life session, the dialog disappears and the machine is frozen Next try: boot to selection dialog switch to console crtl+alt+F1 (takes a moment) issue alt+syreq+1 and alt+sysreq+t ... both answer "operation is disabled" switch back to X ctrl+alt+F7 & click try live session immediately switch back to console ctrl+alt+F1 watchdog detects hard lockup a few seconds later see attached screenshot reproduced also in beta1 of wily werewolf ... a month ago I imagine the beta was still starting, as for bug #1492840. But I've reformated the stick meanwhile and cannot really guarantee, that I didn't confuse the multiple ISO's I tried in short time. version information: kernel 4.2.0-16-generic #19-Ubuntu (4.1.0-3-generic #3-Ubuntu) libqt5sql.so 5.4.2 (both) currently running Kubuntu 15.04 on the same hardware --- ApportVersion: 2.19.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: kubuntu 3331 F.... pulseaudio /dev/snd/controlC0: kubuntu 3331 F.... pulseaudio CasperVersion: 1.365 DistroRelease: Ubuntu 15.10 LiveMediaBuild: Kubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) MachineType: Micro-Star International Co., Ltd. GE70 2OC\2OD\2OE Package: linux (not installed) ProcEnviron: TERM=linux PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/username.seed boot=casper maybe-ubiquity quiet splash --- ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3 RelatedPackageVersions: linux-restricted-modules-4.2.0-16-generic N/A linux-backports-modules-4.2.0-16-generic N/A linux-firmware 1.149 Tags: wily UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' Uname: Linux 4.2.0-16-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 11/06/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: E1757IMS.520 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: MS-1757 dmi.board.vendor: Micro-Star International Co., Ltd. dmi.board.version: REV:0.B dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: Micro-Star International Co., Ltd. dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrE1757IMS.520:bd11/06/2014:svnMicro-StarInternationalCo.,Ltd.:pnGE702OC\2OD\2OE:pvrREV1.0:rvnMicro-StarInternationalCo.,Ltd.:rnMS-1757:rvrREV0.B:cvnMicro-StarInternationalCo.,Ltd.:ct10:cvrN/A: dmi.product.name: GE70 2OC\2OD\2OE dmi.product.version: REV:1.0 dmi.sys.vendor: Micro-Star International Co., Ltd. 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