SRU: https://lists.ubuntu.com/archives/kernel-
team/2019-November/105289.html
** Changed in: linux-oem-osp1 (Ubuntu Bionic)
Status: New => In Progress
** Changed in: linux (Ubuntu Bionic)
Status: Confirmed => In Progress
** Changed in: linux (Ubuntu Disco)
Status: Confirmed => In Progress
** Description changed:
+ [SRU Justification]
+
+ [Impact]
+ Some recent platform seem to have an unstable HPET, which is used to
+ calibrate TSC but turns out to mark an actual stable TSC clocksource as
+ unstable, and then fallback to that unstable HPET as main clocksource. A
+ previous fix was proposed in bug 1840239, which is then observed to hang
+ platforms with modern chipsets including Skylake and ApolloLake at early
+ boot stage when HPET is disabled.
+
+ [Fix]
+ Commit c8c4076723da "x86/timer: Skip PIT initialization on modern chipsets"
+ included in v5.3-rc1 to be backported.
+
+ [Test Case]
+ Boot with kernel built with this change, and see if it will hang right
+ after grub loaded initramfs image.
+
+ [Regression Risk]
+ Low. This change detects the hardware that requires explicit PIT
+ initialization skip and skip it. For those unaffected systems, they
+ remain unaffected.
+
+ ========== original description =========
+
After upgrading kernel to linux-image-4.15.0-1061 (proposed), system
hangs at very beginning of booting, leaving Grub messages "loading..."
on the console.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-1060-oem 4.15.0-1060.69
ProcVersionSignature: Ubuntu 4.15.0-1060.69-oem 4.15.18
Uname: Linux 4.15.0-1060-oem x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/pcmC1D0c: u 1977 F...m pulseaudio
/dev/snd/pcmC1D0p: u 1977 F...m pulseaudio
/dev/snd/controlC0: u 1977 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Mon Nov 4 17:15:56 2019
InstallationDate: Installed on 2019-11-04 (0 days ago)
InstallationMedia: Ubuntu 18.04 "Bionic" - Build amd64 LIVE Binary
20180608-09:38
MachineType: Dell Inc. Precision 5530
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-1060-oem
root=UUID=baa02b0a-d18f-41d2-9e2b-2d057742013c ro mem_sleep_default=deep
nvidia-drm.modeset=1 quiet splash
RelatedPackageVersions:
linux-restricted-modules-4.15.0-1060-oem N/A
linux-backports-modules-4.15.0-1060-oem N/A
linux-firmware 1.173.9
SourcePackage: linux-oem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/27/2019
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.12.0
dmi.board.name: 0184M4
dmi.board.vendor: Dell Inc.
dmi.board.version: X00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.12.0:bd06/27/2019:svnDellInc.:pnPrecision5530:pvr:rvnDellInc.:rn0184M4:rvrX00:cvnDellInc.:ct10:cvr:
dmi.product.family: Precision
dmi.product.name: Precision 5530
dmi.sys.vendor: Dell Inc.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1851216
Title:
System hangs at early boot
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1851216/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
