Details:
4.15 kernel:
----
[ 0.000000] kernel: microcode: microcode updated early to revision
0xdc, date = 2020-04-27
[ 0.000000] kernel: Linux version 4.15.0-112-generic
(buildd@lcy01-amd64-027)
[ 0.000000] kernel: Command line:
BOOT_IMAGE=/boot/vmlinuz-4.15.0-112-generic
root=UUID=4401fe3d-0506-435d-bc52-d3abc67e2981 ro quiet splash
...
[ 0.837778] kernel: microcode: sig=0x506e3, pf=0x10, revision=0xdc
cpu family : 6
model : 94
model name : Intel(R) Core(TM) i7-6770HQ CPU @ 2.60GHz
stepping : 3
microcode : 0xdc
5.4 kernel: (needs dis_ucode_ldr)
---
[ 0.000000] kernel: Linux version 5.4.0-48-generic
(buildd@lcy01-amd64-010) (gcc version 9.3.0 (Ubuntu 9.3.0-10ubuntu2))
#52-Ubuntu SMP Thu Sep 10 10:58:49 UTC 2020 (Ubuntu 5.4.0-48.52-generic 5.4.60)
[ 0.000000] kernel: Command line:
BOOT_IMAGE=/boot/vmlinuz-5.4.0-48-generic
root=UUID=4401fe3d-0506-435d-bc52-d3abc67e2981 ro dis_ucode_ldr
cpu family : 6
model : 94
model name : Intel(R) Core(TM) i7-6770HQ CPU @ 2.60GHz
stepping : 3
microcode : 0xba
microcode version:
---
intel-microcode 3.20200609.0ubuntu0.20.04.2
The blob was introduced two versions back.
intel-microcode (3.20200609.0ubuntu0.20.04.0) focal-security;
urgency=medium
...
sig 0x000506e3, pf_mask 0x36, 2020-04-27, rev 0x00dc, size 104448
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https://bugs.launchpad.net/bugs/1895458
Title:
Computer freezes on kernel 5, works on kernel 4
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