Can you also test the latest 3.19 upstream stable kernel? This will tell us if the fix in 4.1 was also sent for inclusion in the stable releases. It can be downloaded from:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.19.8-vivid/ ** Changed in: linux (Ubuntu) Importance: Low => High -- 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/1453542 Title: 15.04 with 3.19.0-17 kernel boot failure Status in linux package in Ubuntu: Incomplete Bug description: An Acer Aspire 5920 with Ubuntu 15.04 kernel 3.19.0-17-generic fails boot up going unresponsive very early in the sequence. I installed the upstream kernel packages on my Acer Aspire 5920 laptop: linux-headers-4.1.0-040100rc2-generic_4.1.0-040100rc2.201505032335_amd64.deb linux-image-4.1.0-040100rc2-generic_4.1.0-040100rc2.201505032335_amd64.deb The machine booted successfully 3 times with warnings about installed packages having unmet dependencies. uname -r command confirmed that the expected kernel was running: 4.1.0-040100rc2-generic ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: linux-image-3.19.0-16-generic 3.19.0-16.16 ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3 Uname: Linux 3.19.0-16-generic x86_64 ApportVersion: 2.17.2-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: richard 1880 F.... pulseaudio CurrentDesktop: Unity Date: Mon May 11 00:49:15 2015 HibernationDevice: RESUME=UUID=f08d2e82-db26-49b2-b688-4df3cc5f0762 InstallationDate: Installed on 2015-01-08 (122 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) MachineType: Acer, inc. Aspire 5920 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-16-generic root=UUID=bf544740-121f-4cd5-90fe-07cbe21fd0a2 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.19.0-16-generic N/A linux-backports-modules-3.19.0-16-generic N/A linux-firmware 1.143 SourcePackage: linux UpgradeStatus: Upgraded to vivid on 2015-04-24 (16 days ago) dmi.bios.date: 03/14/2008 dmi.bios.vendor: Acer dmi.bios.version: v1.3811 dmi.board.name: Chapala dmi.board.vendor: Acer, Inc. dmi.board.version: Not Applicable dmi.chassis.type: 1 dmi.chassis.vendor: Acer, Inc. dmi.chassis.version: N/A dmi.modalias: dmi:bvnAcer:bvrv1.3811:bd03/14/2008:svnAcer,inc.:pnAspire5920:pvrNotApplicable:rvnAcer,Inc.:rnChapala:rvrNotApplicable:cvnAcer,Inc.:ct1:cvrN/A: dmi.product.name: Aspire 5920 dmi.product.version: Not Applicable dmi.sys.vendor: Acer, inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1453542/+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