I'd like to perform a bisect to figure out what commit caused this regression. We need to identify the earliest kernel where the issue started happening as well as the latest kernel that did not have this issue.
Can you test the following kernels and report back? We are looking for the first kernel version that exhibits this bug: 4.5 final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.5-wily/ 4.6 final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6-yakkety/ 4.7 final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.7/ 4.8-rc1: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8-rc1/ You don't have to test every kernel, just up until the kernel that first has this bug. ** Changed in: linux (Ubuntu) Importance: Undecided => High ** Also affects: linux (Ubuntu Zesty) Importance: High Status: Confirmed ** Also affects: linux (Ubuntu Yakkety) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Yakkety) Status: New => Confirmed ** Changed in: linux (Ubuntu Yakkety) Importance: Undecided => High ** Tags added: performing-bisect zesty ** Tags added: kernel-da-key -- 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/1659340 Title: Linux kernel 4.8 hangs at boot up Status in linux package in Ubuntu: Confirmed Status in linux source package in Yakkety: Confirmed Status in linux source package in Zesty: Confirmed Bug description: I've got an Acer Aspire V5-551G with a 64-bit AMD processor with dual boot, Windows 10 and Ubuntu 16.10. Ubuntu can be started and runs without problems with Linux kernel 4.4.0-45. When I try to start with any of the 4.8.0 kernels delivered with regular Ubuntu updates, they all hang after printing Läser in Linux 4.8.0-34-generic ... Läser in initial ramdisk ... Sorry for the partly Swedish text. I guess that the lines would start with "Loading" instead of "Läser in" on an English version. The behaviour is the same with all 4.8.0 versions up to the latest 4.8.0-34 and with -generic, -generic (upstart) and -generic (recovery mode). After a while the fan runs at full speed, as if the processor is working hard, but nothing happens. After I've tried in vain to start with Linux 4.8.0-xx, and then starts with 4.4.0-45, the following errors are usually printed: [ 2.511733] usb 4-3: string descriptor 0 read error: -22 [ 3.841872] [drm:radeon_scpi_init [radeon]] *ERROR* Cannot find backlight controller /dev/sda7: clean, 807007/9363456 files, 7364300/37423360 blocks [ 21.335117] usb 4-3: string descriptor 0 read error: -22 When a successful start has not been immediately preceded by a failed start, only the line beginning "/dev/sda7" is printed. I have previously commented on bug #1635447. As recommended there, I've also tested with the upstream kernel 4.10-rc3. It worked just as bad as 4.8.0. I tried to report this bug with 'ubuntu-bug linux' after I had booted with the 4.4.0-45 kernel, but I couldn't. It said that linux-image-4.4.0-45- generic is not an official Ubuntu package. --- ApportVersion: 2.20.3-0ubuntu8.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: kjell 2022 F.... pulseaudio /dev/snd/controlC1: kjell 2022 F.... pulseaudio /dev/snd/controlC0: kjell 2022 F.... pulseaudio CurrentDesktop: GNOME-Flashback:Unity DistroRelease: Ubuntu 16.10 HibernationDevice: RESUME=UUID=d42f8b71-8244-45d9-a814-ca7b9fb474bb InstallationDate: Installed on 2013-09-25 (1218 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424) MachineType: Acer Aspire V5-551G Package: linux (not installed) ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-45-generic.efi.signed root=UUID=b953dea5-2c7a-4d65-9b8e-446b111ccce8 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.4.0-45.66-generic 4.4.21 RelatedPackageVersions: linux-restricted-modules-4.4.0-45-generic N/A linux-backports-modules-4.4.0-45-generic N/A linux-firmware 1.161.1 Tags: yakkety Uname: Linux 4.4.0-45-generic x86_64 UpgradeStatus: Upgraded to yakkety on 2016-10-26 (91 days ago) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 03/11/2013 dmi.bios.vendor: Insyde Corp. dmi.bios.version: V2.14 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: Havok dmi.board.vendor: Acer dmi.board.version: Type2 - A01 Board Version dmi.chassis.type: 10 dmi.chassis.vendor: Chassis Manufacturer dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnInsydeCorp.:bvrV2.14:bd03/11/2013:svnAcer:pnAspireV5-551G:pvrV2.14:rvnAcer:rnHavok:rvrType2-A01BoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion: dmi.product.name: Aspire V5-551G dmi.product.version: V2.14 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1659340/+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
