This bug was fixed in the package linux - 4.15.0-23.25
---
linux (4.15.0-23.25) bionic; urgency=medium
* linux: 4.15.0-23.25 -proposed tracker (LP: #1772927)
* arm64 SDEI support needs trampoline code for KPTI (LP: #1768630)
- arm64: mmu: add the entry trampolines start/end
Followed the instructions in
https://wiki.ubuntu.com/Testing/EnableProposed to enable installing from
the proposed repository. Used aptitude -t bionic-proposed to upgrade
the linux-headers-generic, linux-generic, linux-image-generic, and
linux-signed-generic packages. This resulted in the
It would be helpful if you could tell me exactly which packages I need
to install to test this.
After enabling bionic-proposed, "apt-get update -s" yields:
linux-headers-4.15.0-21
linux-headers-4.15.0-21-generic
linux-image-unsigned-4.15.0-21-generic
linux-modules-4.15.0-21-generic
Just for reference, I already have the following installed from previous
testing, and they did fix the issue.
ii linux-headers-4.15.0-214.15.0-21.22~lp1768292
all Header files related to Linux kernel version 4.15.0
ii linux-headers-4.15.0-21-generic
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
bionic' to 'verification-done-bionic'. If the problem still exists,
change the tag
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu)
Status: Incomplete => Fix Released
** Changed in: linux (Ubuntu Bionic)
Importance: Undecided => High
** Changed in: linux (Ubuntu Bionic)
Status: New => Fix
** Tags added: confirmed
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https://bugs.launchpad.net/bugs/1768292
Title:
Bionic: Intermittently sent to Emergency Mode on boot with unhandled
kernel NULL pointer
** Description changed:
+ ===SRU Justification===
+ [Impact]
+ When TBT ICM firmware is not running properly, it may crash the kernel.
+
+ [Fix]
+ Protect against cases when ICM is not set.
+
+ [Test]
+ User confirmed the additional patch works.
+
+ [Regression Potential]
+ Low. It adds a
kaihengfeng, I tested with linux-image-
unsigned-4.15.0-21-generic_4.15.0-21.22~lp1768292_amd64.deb and was
unable to duplicate the issue.
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apport information
** Tags added: apport-collected
** Description changed:
Ubuntu Desktop 18.04 release version, running on a Lenovo T570 laptop.
Sometimes, at boot, the system goes into Emergency Mode. In looking at
journalctl -xb output, the following messages are logged:
May 01
I tested with linux-image-
unsigned-4.16.6-041606-generic_4.16.6-041606.201804300418_amd64.deb and
was unable to duplicate the issue. As a result, per jsalisbury's
request, I will tag this issue 'kernel-fixed-upstream'.
--Galvin
** Tags added: kernel-fixed-upstream
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kaihengfeng, I will download and test with your kernel today.
--Galvin
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https://bugs.launchpad.net/bugs/1768292
Title:
Bionic: Intermittently sent to Emergency Mode on
Please try the kernel here:
https://people.canonical.com/~khfeng/lp1768292/
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https://bugs.launchpad.net/bugs/1768292
Title:
Bionic: Intermittently sent to Emergency Mode
This was after a fresh install of 18.04 desktop last Friday. I don’t
believe any updates have applied since then. I will look at testing the
latest upstream kernel. I am not completely sure, but I think this may
only happen when the t570 is on battery.
--Galvin
> On May 1, 2018, at 12:50 PM,
Did this issue start happening after an update/upgrade? Was there a
prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.16
** Summary changed:
- Intermittently sent to Emergency Mode on boot with unhandled kernel NULL
pointer dereference at 0980
+ Bionic: Intermittently sent to Emergency Mode on boot with unhandled kernel
NULL pointer dereference at 0980
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