Created attachment 838077 [details]
dmesg output showing unchecked MSR access errors

Overview:

Unchecked MSR access errors occur when the Intel P-state driver is initializing
during the boot process. cpufreq fails to initialize policies for the CPUs.

Steps to Reproduce:

1) Download
http://download.opensuse.org/distribution/leap/15.2/iso/openSUSE-Leap-15.2-DVD-x86_64-Build654.2-Media.iso
2) Create bootable USB stick using SUSE Studio Imagewriter
3) Copy autoinst-152-thinkpad.xml autoyast control file to root directory of
second USB stick
4) Plug bootable USB stick into Thinkpad
5) Plug USB stick with autoyast control file into Thinkpad
6) Turn on Thinkpad and press F12 for boot menu
7) Boot from USB stick
8) When prompted press E to edit kernel parameters.
9) Add kernel parameters: ifcfg=eth0=dhcp4
autoyast=usb:///autoinst-152-thinkpad.xml
10) Press F10 to continue
11) Complete installation
12) Boot Thinkpad


Actual Results:

When initializing the Intel P-state driver, unchecked MSR access errors occur
and the following messages are displayed during the boot process:

cpufreq: cpufreq_online: Failed to initialize policy for cpu: 0 (-19)
cpufreq: cpufreq_online: Failed to initialize policy for cpu: 1 (-19)
cpufreq: cpufreq_online: Failed to initialize policy for cpu: 2 (-19)
cpufreq: cpufreq_online: Failed to initialize policy for cpu: 3 (-19)

cpufreq uses the acpi-cpufreq, instead of the intel_pstate, scaling driver.


Expected Results:

No unchecked MSR access errors occur when the Intel P-state driver is
initializing.
cpufreq uses the intel_pstate scaling driver.


Build Date & Hardware:

Leap 15.2 Build date: 18-May-2020 (Build 654.2)

Hardware: Lenovo ThinkPad T520, model 4239CTO
BIOS: ThinkPad BIOS 8AET69WW (1.49)


Autoyast bootloader resource:
  <bootloader>
    <global>
      <cpu_mitigations>auto</cpu_mitigations>
      <gfxmode>auto</gfxmode>
      <hiddenmenu>false</hiddenmenu>
      <os_prober>false</os_prober>
      <secure_boot>false</secure_boot>
      <terminal>gfxterm</terminal>
      <timeout config:type="integer">8</timeout>
      <trusted_grub>false</trusted_grub>
    </global>
    <loader_type>grub2-efi</loader_type>
  </bootloader>