Bug 1172856

someone filed this at 
https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/issues/31

similra also for 06-8e-0b

https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/issues/33

when does it hang? during boot directly?

(In reply to Marcus Meissner from comment #3)
> when does it hang? during boot directly?

Right after hitting return in grub, 'ignore_loglevel' shows nothing.
Xen, if booted with 'ucode=scan',runs briefly until it attempts to install the microcode.

(In reply to Olaf Hering from comment #4)
> (In reply to Marcus Meissner from comment #3)
> > when does it hang? during boot directly?
> 
> Right after hitting return in grub, 'ignore_loglevel' shows nothing.
> Xen, if booted with 'ucode=scan',runs briefly until it attempts to install
> the microcode.

Does the combo of the old kernel and the new ucode also hang?

I'm testing the new ucode with Leap 15.2 kernel and the upstream 5.7, and it seems booting fine on the similar Dell model (E7270, the same CPU).

I could reproduce the hang on Leap 15.1 kernel.  Both the previous release and the one in leap-15.1/test hang up.

And, Leap 15.2 (both the released one and KOTD) booted fine with the latest ucode (taken from 15.1 package).

This is a weird bug.  I booted Leap 15.1 kernel without quiet boot option, then it booted fine with the new firmware.

It's no problem of plymouth, as I kept splash=silent option and it ran even though the kernel message flowed.

Maybe some timing issue?

This is an autogenerated message for OBS integration:
This bug (1172856) was mentioned in
https://build.opensuse.org/request/show/814653 Factory / ucode-intel

Hello opensuse-team,
I can confirm this behavior on a openSUSE leap 15.1 lenovo x260 laptop. After hitting "return" in the grub menu the system hangs forever at "Loading Initial Ramdisk".

Using the previous kernel seems to improve the situation, but I am not 100% sure whether or not the old image contains the old microcode.

Downgrading ucode-intel to the previous version fixes this error.
Please let me know if I can support to debug this furthermore. I found the solution regarding ucode-intel downgrade on the web, so this is an issue hitting others as well.
See e.g. here:

https://forums.opensuse.org/showthread.php/540479-Unable-to-boot-after-kernel-update-opensuse-15-1

Thank you for looking into this,
best

Dieter Jurzitza

Another note on the firmware for this CPU model: I also noticed the intermittent hang at rebooting on the new kernel, no matter which kernel version was.  But it happened only at a warm reboot, and a cold start worked fine again.

So, the new ucode is definitely buggy.

On my X260 it does not depend on warm or cold boot, the new kernel hangs almost always. As I readily mentioned, this has been fixed by downgrading ucode-intel (for me)
Best

Dieter Jurzitza

Intel has released a revert update for the microcode ion Skylake mobile, which is currently gpoing through our QA

This is an autogenerated message for OBS integration:
This bug (1172856) was mentioned in
https://build.opensuse.org/request/show/815412 Factory / ucode-intel

*** Bug 1172892 has been marked as a duplicate of this bug. ***

SUSE-RU-2020:1700-1: An update that has two recommended fixes can now be installed.

Category: recommended (moderate)
Bug References: 1172466,1172856
CVE References: 
Sources used:
SUSE OpenStack Cloud Crowbar 8 (src):    ucode-intel-20200616-13.73.1
SUSE OpenStack Cloud 8 (src):    ucode-intel-20200616-13.73.1
SUSE OpenStack Cloud 7 (src):    ucode-intel-20200616-13.73.1
SUSE Linux Enterprise Server for SAP 12-SP3 (src):    ucode-intel-20200616-13.73.1
SUSE Linux Enterprise Server for SAP 12-SP2 (src):    ucode-intel-20200616-13.73.1
SUSE Linux Enterprise Server 12-SP4 (src):    ucode-intel-20200616-13.73.1
SUSE Linux Enterprise Server 12-SP3-LTSS (src):    ucode-intel-20200616-13.73.1
SUSE Linux Enterprise Server 12-SP3-BCL (src):    ucode-intel-20200616-13.73.1
SUSE Linux Enterprise Server 12-SP2-LTSS (src):    ucode-intel-20200616-13.73.1
SUSE Linux Enterprise Server 12-SP2-BCL (src):    ucode-intel-20200616-13.73.1
SUSE Enterprise Storage 5 (src):    ucode-intel-20200616-13.73.1
HPE Helion Openstack 8 (src):    ucode-intel-20200616-13.73.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

SUSE-RU-2020:1701-1: An update that has two recommended fixes can now be installed.

Category: recommended (moderate)
Bug References: 1172466,1172856
CVE References: 
Sources used:
SUSE Linux Enterprise Module for Basesystem 15-SP1 (src):    ucode-intel-20200616-3.30.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

SUSE-RU-2020:1702-1: An update that has two recommended fixes can now be installed.

Category: recommended (moderate)
Bug References: 1172466,1172856
CVE References: 
Sources used:
SUSE Linux Enterprise Server for SAP 15 (src):    ucode-intel-20200616-3.48.1
SUSE Linux Enterprise High Performance Computing 15-LTSS (src):    ucode-intel-20200616-3.48.1
SUSE Linux Enterprise High Performance Computing 15-ESPOS (src):    ucode-intel-20200616-3.48.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

SUSE-RU-2020:1703-1: An update that has two recommended fixes can now be installed.

Category: recommended (moderate)
Bug References: 1172466,1172856
CVE References: 
Sources used:
SUSE Linux Enterprise Server 12-SP5 (src):    ucode-intel-20200616-3.17.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

openSUSE-RU-2020:0855-1: An update that has two recommended fixes can now be installed.

Category: recommended (moderate)
Bug References: 1172466,1172856
CVE References: 
Sources used:
openSUSE Leap 15.1 (src):    ucode-intel-20200616-lp151.2.27.1

This is an autogenerated message for OBS integration:
This bug (1172856) was mentioned in
https://build.opensuse.org/request/show/816920 15.2 / ucode-intel

SUSE-RU-2020:1802-1: An update that has two recommended fixes can now be installed.

Category: recommended (moderate)
Bug References: 1172466,1172856
CVE References: 
Sources used:
SUSE Linux Enterprise Module for Basesystem 15-SP2 (src):    ucode-intel-20200616-3.3.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

released

SUSE-RU-2020:14425-1: An update that has one recommended fix can now be installed.

Category: recommended (moderate)
Bug References: 1172856
CVE References: 
Sources used:
SUSE Linux Enterprise Server 11-SP4-LTSS (src):    microcode_ctl-1.17-102.83.56.1
SUSE Linux Enterprise Point of Sale 11-SP3 (src):    microcode_ctl-1.17-102.83.56.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.