Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.3 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/v4.3-unstable/ ** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- 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/1513650 Title: Kernel stalls on boot if the nouveau module isn't blacklisted Status in linux package in Ubuntu: Confirmed Bug description: I bought a ASUS N550JK laptop and that uses Hybrid Graphics (Intel + Nvidia). As you boot the installation iso everything is fine until you reboot the first time. When you what for the splash to finish loading the kernel to give you X and the login session it just seems to continue working, but nothing happens for a long time. This is caused by a bug in the nouveau driver when it's loaded by the kernel. I found a temporary solution to that issue which is to manually edit the kernel boot command line and delete splash quiet and then instead add this instead: modprobe.blacklist=nouveau If you then press F10 to boot the kernel the problem disappears. I have the same problem with the same computer if I install Mageia 5 on it so I can't see any other cause than the nouveau driver. I have seen the kernel telling me with alot of lines that there's a bug in nouveau. Description: Ubuntu 15.10 Release: 15.10 linux-image-4.2.0-17-generic I expected that you'd at least always be able to get X working when you install Ubuntu completely fresh. Instead I had to change the kernel boot command line everytime. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: linux-image-4.2.0-17-generic 4.2.0-17.21 ProcVersionSignature: Ubuntu 4.2.0-17.21-generic 4.2.3 Uname: Linux 4.2.0-17-generic x86_64 ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: kristoffer 1705 F.... pulseaudio /dev/snd/controlC1: kristoffer 1705 F.... pulseaudio CurrentDesktop: Unity Date: Thu Nov 5 23:50:33 2015 HibernationDevice: RESUME=UUID=b0bd796e-34e6-49e4-aa3d-8e4655b1d3dd InstallationDate: Installed on 2015-10-31 (5 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) MachineType: ASUSTeK COMPUTER INC. N550JK ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-17-generic.efi.signed root=UUID=74b6a8db-6f88-4f67-8b9e-d4d3fbdb2a2f ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.2.0-17-generic N/A linux-backports-modules-4.2.0-17-generic N/A linux-firmware 1.149.2 SourcePackage: linux UdevLog: Error: [Errno 2] Filen eller katalogen finns inte: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/26/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: N550JK.208 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: N550JK dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN550JK.208:bd09/26/2014:svnASUSTeKCOMPUTERINC.:pnN550JK:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN550JK:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.name: N550JK dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1513650/+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
