** 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
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https://bugs.launchpad.net/bugs/1856387
Title:
Freezing on boot since kernel 4.15.0-72-generic release
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