private_lock, thank you for reporting this and helping make Ubuntu better. However, I am closing it because the bug has been fixed in the latest development version of Ubuntu - Wily Werewolf.
This is a significant bug in Ubuntu. If you need a fix for the bug in previous versions of Ubuntu, please perform as much as possible of the SRU Procedure [1] to bring the need to a developer's attention. [1]: https://wiki.ubuntu.com/StableReleaseUpdates#Procedure ** Package changed: xorg (Ubuntu) => linux (Ubuntu) ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: New => Fix Released -- 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/1492840 Title: Softlockup on boot of Kubuntu 14.04-3 Live-ISO Status in linux package in Ubuntu: Fix Released Bug description: Summary: Booting a Live-session, I reach the language selection. On click on "try Kubuntu" without install, first the mouse changes to two balls circling each other. Next the dialog goes half transparent and the mouse pointer is gone. It won't react to any keyboard input. Details: I've downloaded the recent longterm release: http://cdimage.ubuntu.com/kubuntu/releases/14.04.3/release/kubuntu-14.04.3-desktop-amd64.iso sha256sum 44cc15a31f9a3a6b583929ce711a5eb76fddb1ba447726f9bb2539d78b7a53bc I installed it via USB-creator to my USB pen drive and ran the internal md5sum checks successfully. On boot I get to the dialog to select the language, that I can switch back and forth. Also there's a link that can bring up a Konqueror window (though without entering my WiFi password, it won't connect). In addition, I can switch to a console via Ctrl+Alt+F1 Once I click the "try Kubuntu"-button, the error occurs. So I klicked it and while the mouse-cursor balls were still cycling I switched to console. Alt+SysReq+1 was not supported Alt+SysReq+t first didn't do anything, so I tried switching back via Ctrl+Alt+F7 and it immediately dumped some cryptic stuff to the console, that refreshes about ever 30 seconds only to repeat itself. I'll attach a photo. BTW: I tried to update the BIOS to no avail (the new BIOS shows exactly the same behavior on this machine). ubuntu-bug was run on the same hardware but in a newer Kubuntu 15.04 installed on it's harddrive. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: xorg 1:7.7+7ubuntu4 ProcVersionSignature: Ubuntu 3.19.0-26.28-generic 3.19.8-ckt4 Uname: Linux 3.19.0-26-generic x86_64 ApportVersion: 2.17.2-0ubuntu1.3 Architecture: amd64 CurrentDesktop: KDE Date: Sun Sep 6 22:02:37 2015 InstallationDate: Installed on 2014-04-12 (512 days ago) InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326.2) ProcEnviron: LANGUAGE=de:en_US:en_GB:fr PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to vivid on 2015-05-04 (125 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1492840/+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
