** Description changed: + [SRU Justification] + + [Impact] + In bug 1840239, HPET is disabled on some systems for they caused TSC + being marked unstable while it is not. This caused an regression as bug + 1851216 that some systems may then hang at early, so a fix cherry picked + back from v5.3-rc1. However, this fix also introduce yet another + regression that some other users may hang at boot while PIT is diabled + in the previous fix. + + [Fix] + Commit 979923871f69 ("x86/timer: Don't skip PIT setup when APIC is + disabled or in legacy mode") from v5.6-rc1, also backported to v5.4.19 + and v5.5.3, fixes PIT setup in this case. + + [Test Case] + Simply boot a patch kernel on systems affected and it shouldn't hang. + + [Regression Potential] + Low. Stable patch and trivial backport. + + [Other Info] + The same fix for bug 1851216 was also backported to Disco and Eoan, but + they were then fixed with this 979923871f69 commit backported in bug + 1866858 and bug 1867051, which pulls v5.4 stable patches into Disco and + Eoan correspondingly, leaving B/OEM-B the only victims so far. + + ========== Original Bug Description ========== + After the update to install kernel 4.15.0-72-generic (a bit over a week ago) my computer will not boot. On boot, all I see is the purple screen with: Loading Linux 4.15.0-72-generic ... Loading initial ramdisk ... and nothing happens. Just sits there. I've waited about 5-10 minutes on occasion but to no avail. I've checked a number of logs in /var/log but not found anything. If I go into the advanced options and select kernel 4.15.0-70-generic, the computer boots normally. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-72-generic 4.15.0-72.81 ProcVersionSignature: Ubuntu 4.15.0-70.79-generic 4.15.18 Uname: Linux 4.15.0-70-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.9 Architecture: amd64 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC0: tony 1977 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC0: tony 1977 F.... pulseaudio CurrentDesktop: ubuntu:GNOME Date: Sat Dec 14 21:53:14 2019 HibernationDevice: RESUME=UUID=5475ce25-e091-45e2-9811-9b5cddc08dd1 InstallationDate: Installed on 2018-09-16 (454 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) Lsusb: - Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub - Bus 001 Device 003: ID 04f2:b59e Chicony Electronics Co., Ltd - Bus 001 Device 002: ID 046d:c063 Logitech, Inc. DELL Laser Mouse - Bus 001 Device 004: ID 8087:0aaa Intel Corp. - Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub + Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub + Bus 001 Device 003: ID 04f2:b59e Chicony Electronics Co., Ltd + Bus 001 Device 002: ID 046d:c063 Logitech, Inc. DELL Laser Mouse + Bus 001 Device 004: ID 8087:0aaa Intel Corp. + Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: GIGABYTE Sabre 17WV8 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-70-generic root=UUID=9455257c-d3b7-4d61-853d-ab0b0ee40013 ro acpi=off RelatedPackageVersions: - linux-restricted-modules-4.15.0-70-generic N/A - linux-backports-modules-4.15.0-70-generic N/A - linux-firmware 1.173.13 + linux-restricted-modules-4.15.0-70-generic N/A + linux-backports-modules-4.15.0-70-generic N/A + linux-firmware 1.173.13 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/22/2018 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: F05 dmi.board.asset.tag: Tag 12345 dmi.board.name: Sabre 17WV8 dmi.board.vendor: GIGABYTE dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: GIGABYTE dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF05:bd05/22/2018:svnGIGABYTE:pnSabre17WV8:pvrNotApplicable:rvnGIGABYTE:rnSabre17WV8:rvrNotApplicable:cvnGIGABYTE:ct10:cvrN/A: dmi.product.family: Sabre dmi.product.name: Sabre 17WV8 dmi.product.version: Not Applicable dmi.sys.vendor: GIGABYTE
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1856387 Title: Freezing on boot since kernel 4.15.0-72-generic release To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1856387/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs