Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
I have started updating the system via apt-get update and upgrade. New version of intel-microcode was buster/non-free: 3.20220207.1~deb10u1

System booted normally but started to crash/freeze with garbadge screen and did not response to any keyboard combination after starting Firefox browser and let say watching YouTube video.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

I revert back to old package 3.20210608.2~deb10u1 and this bring back the stable state of system. No more crashes or garbadge screen.

   * What was the outcome of this action?
   * What outcome did you expect instead?

*** End of the template - remove these template lines ***

I will need more data about your system, and what happened to it.  As
far as I can tell from online datasheets, the possible processor types
that the Dell Studio 1555 can accept had no microcode changes.

This means it was likely the fact that your initramfs changed that
caused issues, not the intel-microcode *contents*.

First, I need the output of these commands, please run them as root.
They will not modify your system.  They will tell me the microcode
contents of your initramfs, your processor type, as well as the way
intel-microcode is supposed to update the initramfs.


du -sh /boot

iucode_tool -Sv

iucode-tool -tr -Lv /boot/initrd.img*

cat /etc/default/intel-microcode

dpkg -s initramfs-tools dracut


Thank you...

Hello Henrique,

Thank you for your update. Here are the outputs from the requested
commands. Please be informed that  they are triggered on working (
non-updated ) system with intel-microcode. If you need I can run them onto
updated system with most recent package.

root@del40:~# du -sh /boot
112M /boot
root@del40:~#

2. iucode_tool -Sv
iucode_tool: system has processor(s) with signature 0x0001067a
iucode_tool: assuming all processors have the same type, family and model
root@del40:~#

3. root@del40:~# iucode-tool -tr -Lv /boot/initrd.img*
microcode bundle 1: /boot/initrd.img-4.19.0-18-amd64
 001/001: sig 0x000006f2, pf_mask 0x20, 2010-10-02, rev 0x005c, size 4096
 001/002: sig 0x000006f2, pf_mask 0x01, 2010-10-02, rev 0x005d, size 4096
 001/003: sig 0x000006f6, pf_mask 0x20, 2010-10-01, rev 0x00d1, size 4096
 001/004: sig 0x000006f6, pf_mask 0x04, 2010-10-01, rev 0x00d2, size 4096
 001/005: sig 0x000006f6, pf_mask 0x01, 2010-09-30, rev 0x00d0, size 4096
 001/006: sig 0x000006f7, pf_mask 0x40, 2010-10-02, rev 0x006b, size 4096
 001/007: sig 0x000006f7, pf_mask 0x10, 2010-10-02, rev 0x006a, size 4096
 001/008: sig 0x000006fa, pf_mask 0x80, 2010-10-02, rev 0x0095, size 4096
 001/009: sig 0x000006fb, pf_mask 0x80, 2010-10-03, rev 0x00ba, size 4096
 001/010: sig 0x000006fb, pf_mask 0x40, 2010-10-03, rev 0x00bc, size 4096
 001/011: sig 0x000006fb, pf_mask 0x20, 2010-10-03, rev 0x00ba, size 4096
 001/012: sig 0x000006fb, pf_mask 0x10, 2010-10-03, rev 0x00ba, size 4096
 001/013: sig 0x000006fb, pf_mask 0x08, 2010-10-03, rev 0x00bb, size 4096
 001/014: sig 0x000006fb, pf_mask 0x04, 2010-10-03, rev 0x00bc, size 4096
 001/015: sig 0x000006fb, pf_mask 0x01, 2010-10-03, rev 0x00ba, size 4096
 001/016: sig 0x000006fd, pf_mask 0x80, 2010-10-02, rev 0x00a4, size 4096
 001/017: sig 0x000006fd, pf_mask 0x20, 2010-10-02, rev 0x00a4, size 4096
 001/018: sig 0x000006fd, pf_mask 0x01, 2010-10-02, rev 0x00a4, size 4096
 001/019: sig 0x00000f34, pf_mask 0x1d, 2005-04-21, rev 0x0017, size 7168
 001/020: sig 0x00000f41, pf_mask 0xbd, 2005-04-22, rev 0x0017, size 5120
 001/021: sig 0x00000f41, pf_mask 0x02, 2005-04-21, rev 0x0016, size 5120
 001/022: sig 0x00000f43, pf_mask 0x9d, 2005-04-21, rev 0x0005, size 2048
 001/023: sig 0x00000f44, pf_mask 0x9d, 2005-04-21, rev 0x0006, size 3072
 001/024: sig 0x00000f47, pf_mask 0x9d, 2005-04-21, rev 0x0003, size 3072
 001/025: sig 0x00000f48, pf_mask 0x5f, 2005-06-30, rev 0x0007, size 3072
 001/026: sig 0x00000f48, pf_mask 0x02, 2008-01-15, rev 0x000e, size 3072
 001/027: sig 0x00000f48, pf_mask 0x01, 2006-05-08, rev 0x000c, size 3072
 001/028: sig 0x00000f49, pf_mask 0xbd, 2005-04-21, rev 0x0003, size 2048
 001/029: sig 0x00000f4a, pf_mask 0x5d, 2005-06-10, rev 0x0002, size 2048
 001/030: sig 0x00000f4a, pf_mask 0x5c, 2005-12-14, rev 0x0004, size 2048
 001/031: sig 0x00000f62, pf_mask 0x04, 2005-12-15, rev 0x000f, size 3072
 001/032: sig 0x00000f64, pf_mask 0x34, 2005-12-23, rev 0x0004, size 3072
 001/033: sig 0x00000f64, pf_mask 0x01, 2005-12-15, rev 0x0002, size 3072
 001/034: sig 0x00000f65, pf_mask 0x04, 2007-05-10, rev 0x000b, size 2048
 001/035: sig 0x00000f65, pf_mask 0x01, 2006-04-26, rev 0x0008, size 2048
 001/036: sig 0x00000f68, pf_mask 0x22, 2006-07-14, rev 0x0009, size 2048
 001/037: sig 0x00010661, pf_mask 0x80, 2010-10-04, rev 0x0044, size 4096
 001/038: sig 0x00010661, pf_mask 0x04, 2007-05-01, rev 0x0036, size 4096
 001/039: sig 0x00010661, pf_mask 0x02, 2010-10-04, rev 0x0042, size 4096
 001/040: sig 0x00010661, pf_mask 0x01, 2010-10-04, rev 0x0043, size 4096
 001/041: sig 0x00010676, pf_mask 0x80, 2010-09-29, rev 0x060f, size 4096
 001/042: sig 0x00010676, pf_mask 0x40, 2010-09-29, rev 0x060f, size 4096
 001/043: sig 0x00010676, pf_mask 0x10, 2010-09-29, rev 0x060f, size 4096
 001/044: sig 0x00010676, pf_mask 0x04, 2010-09-29, rev 0x060f, size 4096
 001/045: sig 0x00010676, pf_mask 0x01, 2010-09-29, rev 0x060f, size 4096
 001/046: sig 0x00010677, pf_mask 0x10, 2010-09-29, rev 0x070a, size 4096
 001/047: sig 0x0001067a, pf_mask 0xa0, 2010-09-28, rev 0x0a0b, size 8192
 001/048: sig 0x0001067a, pf_mask 0x44, 2010-09-28, rev 0x0a0b, size 8192
 001/049: sig 0x0001067a, pf_mask 0x11, 2010-09-28, rev 0x0a0b, size 8192
 001/050: sig 0x000106a4, pf_mask 0x03, 2013-06-21, rev 0x0012, size 14336
 001/051: sig 0x000106a5, pf_mask 0x03, 2018-05-11, rev 0x001d, size 12288
 001/052: sig 0x000106c2, pf_mask 0x08, 2009-04-10, rev 0x0219, size 5120
 001/053: sig 0x000106c2, pf_mask 0x04, 2009-04-10, rev 0x0218, size 5120
 001/054: sig 0x000106c2, pf_mask 0x01, 2009-04-10, rev 0x0217, size 5120
 001/055: sig 0x000106ca, pf_mask 0x10, 2009-08-25, rev 0x0107, size 5120
 001/056: sig 0x000106ca, pf_mask 0x08, 2009-08-25, rev 0x0107, size 5120
 001/057: sig 0x000106ca, pf_mask 0x04, 2009-08-25, rev 0x0107, size 5120
 001/058: sig 0x000106ca, pf_mask 0x01, 2009-08-25, rev 0x0107, size 5120
 001/059: sig 0x000106d1, pf_mask 0x08, 2010-09-30, rev 0x0029, size 4096
 001/060: sig 0x000106e5, pf_mask 0x13, 2018-05-08, rev 0x000a, size 9216
 001/061: sig 0x00020652, pf_mask 0x12, 2018-05-08, rev 0x0011, size 9216
 001/062: sig 0x00020655, pf_mask 0x92, 2018-04-23, rev 0x0007, size 4096
 001/063: sig 0x000206a7, pf_mask 0x12, 2019-02-17, rev 0x002f, size 12288
 001/064: sig 0x000206c2, pf_mask 0x03, 2018-05-08, rev 0x001f, size 11264
 001/065: sig 0x000206d6, pf_mask 0x6d, 2020-03-04, rev 0x0621, size 18432
 001/066: sig 0x000206d7, pf_mask 0x6d, 2020-03-24, rev 0x071a, size 19456
 001/067: sig 0x000206e6, pf_mask 0x04, 2018-05-15, rev 0x000d, size 9216
 001/068: sig 0x000206f2, pf_mask 0x05, 2018-05-16, rev 0x003b, size 14336
 001/069: sig 0x00030678, pf_mask 0x0c, 2019-04-22, rev 0x0838, size 52224
 001/070: sig 0x00030678, pf_mask 0x02, 2019-04-22, rev 0x0838, size 52224
 001/071: sig 0x00030679, pf_mask 0x0f, 2019-04-23, rev 0x090c, size 52224
 001/072: sig 0x000306a9, pf_mask 0x12, 2019-02-13, rev 0x0021, size 14336
 001/073: sig 0x000306c3, pf_mask 0x32, 2019-11-12, rev 0x0028, size 23552
 001/074: sig 0x000306d4, pf_mask 0xc0, 2019-11-12, rev 0x002f, size 19456
 001/075: sig 0x000306e4, pf_mask 0xed, 2019-03-14, rev 0x042e, size 16384
 001/076: sig 0x000306e6, pf_mask 0xed, 2013-06-19, rev 0x0600, size 11264
 001/077: sig 0x000306e7, pf_mask 0xed, 2019-03-14, rev 0x0715, size 17408
 001/078: sig 0x000306f2, pf_mask 0x6f, 2021-08-11, rev 0x0049, size 38912
 001/079: sig 0x000306f4, pf_mask 0x80, 2021-05-24, rev 0x001a, size 23552
 001/080: sig 0x00040651, pf_mask 0x72, 2019-11-12, rev 0x0026, size 22528
 001/081: sig 0x00040661, pf_mask 0x32, 2019-11-12, rev 0x001c, size 25600
 001/082: sig 0x00040671, pf_mask 0x22, 2019-11-12, rev 0x0022, size 14336
 001/083: sig 0x000406c3, pf_mask 0x01, 2019-04-23, rev 0x0368, size 69632
 001/084: sig 0x000406c4, pf_mask 0x01, 2019-04-23, rev 0x0411, size 68608
 001/085: sig 0x000406d8, pf_mask 0x01, 2019-09-16, rev 0x012d, size 84992
 001/086: sig 0x000406e3, pf_mask 0xc0, 2021-04-28, rev 0x00ec, size 105472
 001/087: sig 0x000406f1, pf_mask 0xef, 2021-05-19, rev 0xb000040, size
35840
 001/088: sig 0x00050653, pf_mask 0x97, 2021-05-26, rev 0x100015c, size
34816
 001/089: sig 0x00050654, pf_mask 0xb7, 2021-06-16, rev 0x2006c0a, size
43008
 001/090: sig 0x00050655, pf_mask 0xb7, 2018-11-16, rev 0x3000010, size
47104
 001/091: sig 0x00050656, pf_mask 0xbf, 2021-08-13, rev 0x400320a, size
35840
 001/092: sig 0x00050657, pf_mask 0xbf, 2021-08-13, rev 0x500320a, size
36864
 001/093: sig 0x0005065b, pf_mask 0xbf, 2021-06-04, rev 0x7002402, size
28672
 001/094: sig 0x00050662, pf_mask 0x10, 2019-06-17, rev 0x001c, size 32768
 001/095: sig 0x00050663, pf_mask 0x10, 2021-06-12, rev 0x700001c, size
28672
 001/096: sig 0x00050664, pf_mask 0x10, 2021-06-12, rev 0xf00001a, size
27648
 001/097: sig 0x00050665, pf_mask 0x10, 2021-09-18, rev 0xe000014, size
23552
 001/098: sig 0x000506c2, pf_mask 0x01, 2018-05-11, rev 0x0014, size 15360
 001/099: sig 0x000506c9, pf_mask 0x03, 2021-05-10, rev 0x0046, size 17408
 001/100: sig 0x000506ca, pf_mask 0x03, 2021-05-10, rev 0x0024, size 16384
 001/101: sig 0x000506e3, pf_mask 0x36, 2021-04-29, rev 0x00ec, size 108544
 001/102: sig 0x000506f1, pf_mask 0x01, 2021-05-10, rev 0x0036, size 11264
 001/103: sig 0x00060663, pf_mask 0x80, 2018-04-17, rev 0x002a, size 87040
 001/104: sig 0x000606a5, pf_mask 0x87, 2021-03-08, rev 0xc0002f0, size
283648
 001/105: sig 0x000606a6, pf_mask 0x87, 2021-12-03, rev 0xd000331, size
291840
 001/106: sig 0x000706a1, pf_mask 0x01, 2021-05-10, rev 0x0038, size 74752
 001/107: sig 0x000706a8, pf_mask 0x01, 2021-05-10, rev 0x001c, size 75776
 001/108: sig 0x000706e5, pf_mask 0x80, 2021-05-26, rev 0x00a8, size 110592
 001/109: sig 0x000806a1, pf_mask 0x10, 2021-09-02, rev 0x002d, size 34816
 001/110: sig 0x000806c1, pf_mask 0x80, 2021-08-06, rev 0x009a, size 109568
 001/111: sig 0x000806c2, pf_mask 0xc2, 2021-07-16, rev 0x0022, size 96256
 001/112: sig 0x000806d1, pf_mask 0xc2, 2021-07-16, rev 0x003c, size 101376
 001/113: sig 0x000806e9, pf_mask 0xc0, 2021-04-28, rev 0x00ec, size 104448
 001/114: sig 0x000806e9, pf_mask 0x10, 2021-04-28, rev 0x00ec, size 104448
 001/115: sig 0x000806ea, pf_mask 0xc0, 2021-04-28, rev 0x00ec, size 103424
 001/116: sig 0x000806eb, pf_mask 0xd0, 2021-04-28, rev 0x00ec, size 104448
 001/117: sig 0x000806ec, pf_mask 0x94, 2021-04-28, rev 0x00ec, size 104448
 001/118: sig 0x00090661, pf_mask 0x01, 2021-09-21, rev 0x0015, size 20480
 001/119: sig 0x000906c0, pf_mask 0x01, 2021-08-09, rev 0x2400001f, size
20480
 001/120: sig 0x000906e9, pf_mask 0x2a, 2021-04-29, rev 0x00ec, size 106496
 001/121: sig 0x000906ea, pf_mask 0x22, 2021-04-28, rev 0x00ec, size 102400
 001/122: sig 0x000906eb, pf_mask 0x02, 2021-04-28, rev 0x00ec, size 104448
 001/123: sig 0x000906ec, pf_mask 0x22, 2021-04-28, rev 0x00ec, size 103424
 001/124: sig 0x000906ed, pf_mask 0x22, 2021-04-28, rev 0x00ec, size 103424
 001/125: sig 0x000a0652, pf_mask 0x20, 2021-04-28, rev 0x00ec, size 93184
 001/126: sig 0x000a0653, pf_mask 0x22, 2021-04-28, rev 0x00ec, size 94208
 001/127: sig 0x000a0655, pf_mask 0x22, 2021-04-28, rev 0x00ee, size 94208
 001/128: sig 0x000a0660, pf_mask 0x80, 2021-04-28, rev 0x00ea, size 94208
 001/129: sig 0x000a0661, pf_mask 0x80, 2021-04-29, rev 0x00ec, size 93184
 001/130: sig 0x000a0671, pf_mask 0x02, 2021-08-29, rev 0x0050, size 102400
microcode bundle 2: /boot/initrd.img-4.19.0-20-amd64
 002/001: sig 0x000006f2, pf_mask 0x20, 2010-10-02, rev 0x005c, size 4096
 002/002: sig 0x000006f2, pf_mask 0x01, 2010-10-02, rev 0x005d, size 4096
 002/003: sig 0x000006f6, pf_mask 0x20, 2010-10-01, rev 0x00d1, size 4096
 002/004: sig 0x000006f6, pf_mask 0x04, 2010-10-01, rev 0x00d2, size 4096
 002/005: sig 0x000006f6, pf_mask 0x01, 2010-09-30, rev 0x00d0, size 4096
 002/006: sig 0x000006f7, pf_mask 0x40, 2010-10-02, rev 0x006b, size 4096
 002/007: sig 0x000006f7, pf_mask 0x10, 2010-10-02, rev 0x006a, size 4096
 002/008: sig 0x000006fa, pf_mask 0x80, 2010-10-02, rev 0x0095, size 4096
 002/009: sig 0x000006fb, pf_mask 0x80, 2010-10-03, rev 0x00ba, size 4096
 002/010: sig 0x000006fb, pf_mask 0x40, 2010-10-03, rev 0x00bc, size 4096
 002/011: sig 0x000006fb, pf_mask 0x20, 2010-10-03, rev 0x00ba, size 4096
 002/012: sig 0x000006fb, pf_mask 0x10, 2010-10-03, rev 0x00ba, size 4096
 002/013: sig 0x000006fb, pf_mask 0x08, 2010-10-03, rev 0x00bb, size 4096
 002/014: sig 0x000006fb, pf_mask 0x04, 2010-10-03, rev 0x00bc, size 4096
 002/015: sig 0x000006fb, pf_mask 0x01, 2010-10-03, rev 0x00ba, size 4096
 002/016: sig 0x000006fd, pf_mask 0x80, 2010-10-02, rev 0x00a4, size 4096
 002/017: sig 0x000006fd, pf_mask 0x20, 2010-10-02, rev 0x00a4, size 4096
 002/018: sig 0x000006fd, pf_mask 0x01, 2010-10-02, rev 0x00a4, size 4096
 002/019: sig 0x00000f34, pf_mask 0x1d, 2005-04-21, rev 0x0017, size 7168
 002/020: sig 0x00000f41, pf_mask 0xbd, 2005-04-22, rev 0x0017, size 5120
 002/021: sig 0x00000f41, pf_mask 0x02, 2005-04-21, rev 0x0016, size 5120
 002/022: sig 0x00000f43, pf_mask 0x9d, 2005-04-21, rev 0x0005, size 2048
 002/023: sig 0x00000f44, pf_mask 0x9d, 2005-04-21, rev 0x0006, size 3072
 002/024: sig 0x00000f47, pf_mask 0x9d, 2005-04-21, rev 0x0003, size 3072
 002/025: sig 0x00000f48, pf_mask 0x5f, 2005-06-30, rev 0x0007, size 3072
 002/026: sig 0x00000f48, pf_mask 0x02, 2008-01-15, rev 0x000e, size 3072
 002/027: sig 0x00000f48, pf_mask 0x01, 2006-05-08, rev 0x000c, size 3072
 002/028: sig 0x00000f49, pf_mask 0xbd, 2005-04-21, rev 0x0003, size 2048
 002/029: sig 0x00000f4a, pf_mask 0x5d, 2005-06-10, rev 0x0002, size 2048
 002/030: sig 0x00000f4a, pf_mask 0x5c, 2005-12-14, rev 0x0004, size 2048
 002/031: sig 0x00000f62, pf_mask 0x04, 2005-12-15, rev 0x000f, size 3072
 002/032: sig 0x00000f64, pf_mask 0x34, 2005-12-23, rev 0x0004, size 3072
 002/033: sig 0x00000f64, pf_mask 0x01, 2005-12-15, rev 0x0002, size 3072
 002/034: sig 0x00000f65, pf_mask 0x04, 2007-05-10, rev 0x000b, size 2048
 002/035: sig 0x00000f65, pf_mask 0x01, 2006-04-26, rev 0x0008, size 2048
 002/036: sig 0x00000f68, pf_mask 0x22, 2006-07-14, rev 0x0009, size 2048
 002/037: sig 0x00010661, pf_mask 0x80, 2010-10-04, rev 0x0044, size 4096
 002/038: sig 0x00010661, pf_mask 0x04, 2007-05-01, rev 0x0036, size 4096
 002/039: sig 0x00010661, pf_mask 0x02, 2010-10-04, rev 0x0042, size 4096
 002/040: sig 0x00010661, pf_mask 0x01, 2010-10-04, rev 0x0043, size 4096
 002/041: sig 0x00010676, pf_mask 0x80, 2010-09-29, rev 0x060f, size 4096
 002/042: sig 0x00010676, pf_mask 0x40, 2010-09-29, rev 0x060f, size 4096
 002/043: sig 0x00010676, pf_mask 0x10, 2010-09-29, rev 0x060f, size 4096
 002/044: sig 0x00010676, pf_mask 0x04, 2010-09-29, rev 0x060f, size 4096
 002/045: sig 0x00010676, pf_mask 0x01, 2010-09-29, rev 0x060f, size 4096
 002/046: sig 0x00010677, pf_mask 0x10, 2010-09-29, rev 0x070a, size 4096
 002/047: sig 0x0001067a, pf_mask 0xa0, 2010-09-28, rev 0x0a0b, size 8192
 002/048: sig 0x0001067a, pf_mask 0x44, 2010-09-28, rev 0x0a0b, size 8192
 002/049: sig 0x0001067a, pf_mask 0x11, 2010-09-28, rev 0x0a0b, size 8192
 002/050: sig 0x000106a4, pf_mask 0x03, 2013-06-21, rev 0x0012, size 14336
 002/051: sig 0x000106a5, pf_mask 0x03, 2018-05-11, rev 0x001d, size 12288
 002/052: sig 0x000106c2, pf_mask 0x08, 2009-04-10, rev 0x0219, size 5120
 002/053: sig 0x000106c2, pf_mask 0x04, 2009-04-10, rev 0x0218, size 5120
 002/054: sig 0x000106c2, pf_mask 0x01, 2009-04-10, rev 0x0217, size 5120
 002/055: sig 0x000106ca, pf_mask 0x10, 2009-08-25, rev 0x0107, size 5120
 002/056: sig 0x000106ca, pf_mask 0x08, 2009-08-25, rev 0x0107, size 5120
 002/057: sig 0x000106ca, pf_mask 0x04, 2009-08-25, rev 0x0107, size 5120
 002/058: sig 0x000106ca, pf_mask 0x01, 2009-08-25, rev 0x0107, size 5120
 002/059: sig 0x000106d1, pf_mask 0x08, 2010-09-30, rev 0x0029, size 4096
 002/060: sig 0x000106e5, pf_mask 0x13, 2018-05-08, rev 0x000a, size 9216
 002/061: sig 0x00020652, pf_mask 0x12, 2018-05-08, rev 0x0011, size 9216
 002/062: sig 0x00020655, pf_mask 0x92, 2018-04-23, rev 0x0007, size 4096
 002/063: sig 0x000206a7, pf_mask 0x12, 2019-02-17, rev 0x002f, size 12288
 002/064: sig 0x000206c2, pf_mask 0x03, 2018-05-08, rev 0x001f, size 11264
 002/065: sig 0x000206d6, pf_mask 0x6d, 2020-03-04, rev 0x0621, size 18432
 002/066: sig 0x000206d7, pf_mask 0x6d, 2020-03-24, rev 0x071a, size 19456
 002/067: sig 0x000206e6, pf_mask 0x04, 2018-05-15, rev 0x000d, size 9216
 002/068: sig 0x000206f2, pf_mask 0x05, 2018-05-16, rev 0x003b, size 14336
 002/069: sig 0x00030678, pf_mask 0x0c, 2019-04-22, rev 0x0838, size 52224
 002/070: sig 0x00030678, pf_mask 0x02, 2019-04-22, rev 0x0838, size 52224
 002/071: sig 0x00030679, pf_mask 0x0f, 2019-04-23, rev 0x090c, size 52224
 002/072: sig 0x000306a9, pf_mask 0x12, 2019-02-13, rev 0x0021, size 14336
 002/073: sig 0x000306c3, pf_mask 0x32, 2019-11-12, rev 0x0028, size 23552
 002/074: sig 0x000306d4, pf_mask 0xc0, 2019-11-12, rev 0x002f, size 19456
 002/075: sig 0x000306e4, pf_mask 0xed, 2019-03-14, rev 0x042e, size 16384
 002/076: sig 0x000306e6, pf_mask 0xed, 2013-06-19, rev 0x0600, size 11264
 002/077: sig 0x000306e7, pf_mask 0xed, 2019-03-14, rev 0x0715, size 17408
 002/078: sig 0x000306f2, pf_mask 0x6f, 2021-01-27, rev 0x0046, size 34816
 002/079: sig 0x000306f4, pf_mask 0x80, 2021-02-05, rev 0x0019, size 19456
 002/080: sig 0x00040651, pf_mask 0x72, 2019-11-12, rev 0x0026, size 22528
 002/081: sig 0x00040661, pf_mask 0x32, 2019-11-12, rev 0x001c, size 25600
 002/082: sig 0x00040671, pf_mask 0x22, 2019-11-12, rev 0x0022, size 14336
 002/083: sig 0x000406c3, pf_mask 0x01, 2019-04-23, rev 0x0368, size 69632
 002/084: sig 0x000406c4, pf_mask 0x01, 2019-04-23, rev 0x0411, size 68608
 002/085: sig 0x000406d8, pf_mask 0x01, 2019-09-16, rev 0x012d, size 84992
 002/086: sig 0x000406e3, pf_mask 0xc0, 2021-01-25, rev 0x00ea, size 105472
 002/087: sig 0x000406f1, pf_mask 0xef, 2021-02-06, rev 0xb00003e, size
31744
 002/088: sig 0x00050653, pf_mask 0x97, 2021-03-08, rev 0x100015b, size
34816
 002/089: sig 0x00050654, pf_mask 0xb7, 2021-03-08, rev 0x2006b06, size
36864
 002/090: sig 0x00050655, pf_mask 0xb7, 2018-11-16, rev 0x3000010, size
47104
 002/091: sig 0x00050656, pf_mask 0xbf, 2021-03-08, rev 0x4003102, size
30720
 002/092: sig 0x00050657, pf_mask 0xbf, 2021-03-08, rev 0x5003102, size
30720
 002/093: sig 0x0005065b, pf_mask 0xbf, 2021-04-23, rev 0x7002302, size
27648
 002/094: sig 0x00050662, pf_mask 0x10, 2019-06-17, rev 0x001c, size 32768
 002/095: sig 0x00050663, pf_mask 0x10, 2021-02-04, rev 0x700001b, size
24576
 002/096: sig 0x00050664, pf_mask 0x10, 2021-02-04, rev 0xf000019, size
24576
 002/097: sig 0x00050665, pf_mask 0x10, 2021-02-04, rev 0xe000012, size
19456
 002/098: sig 0x000506c2, pf_mask 0x01, 2018-05-11, rev 0x0014, size 15360
 002/099: sig 0x000506c9, pf_mask 0x03, 2020-10-23, rev 0x0044, size 17408
 002/100: sig 0x000506ca, pf_mask 0x03, 2020-10-23, rev 0x0020, size 15360
 002/101: sig 0x000506e3, pf_mask 0x36, 2021-01-25, rev 0x00ea, size 105472
 002/102: sig 0x000506f1, pf_mask 0x01, 2020-10-23, rev 0x0034, size 11264
 002/103: sig 0x00060663, pf_mask 0x80, 2018-04-17, rev 0x002a, size 87040
 002/104: sig 0x000606a5, pf_mask 0x87, 2021-03-08, rev 0xc0002f0, size
283648
 002/105: sig 0x000606a6, pf_mask 0x87, 2021-04-25, rev 0xd0002a0, size
283648
 002/106: sig 0x000706a1, pf_mask 0x01, 2020-10-23, rev 0x0036, size 74752
 002/107: sig 0x000706a8, pf_mask 0x01, 2020-10-23, rev 0x001a, size 75776
 002/108: sig 0x000706e5, pf_mask 0x80, 2020-11-01, rev 0x00a6, size 110592
 002/109: sig 0x00080665, pf_mask 0x01, 2021-02-17, rev 0xb00000f, size
130048
  sig 0x00080665, pf_mask 0x01, 2021-02-17, rev 0xb00000f
  sig 0x00080664, pf_mask 0x01, 2021-02-17, rev 0xb00000f
 002/110: sig 0x000806a1, pf_mask 0x10, 2020-11-06, rev 0x002a, size 32768
 002/111: sig 0x000806c1, pf_mask 0x80, 2021-03-31, rev 0x0088, size 109568
 002/112: sig 0x000806c2, pf_mask 0xc2, 2021-04-07, rev 0x0016, size 94208
 002/113: sig 0x000806d1, pf_mask 0xc2, 2021-04-23, rev 0x002c, size 99328
 002/114: sig 0x000806e9, pf_mask 0xc0, 2021-01-05, rev 0x00ea, size 104448
 002/115: sig 0x000806e9, pf_mask 0x10, 2021-01-05, rev 0x00ea, size 104448
 002/116: sig 0x000806ea, pf_mask 0xc0, 2021-01-06, rev 0x00ea, size 103424
 002/117: sig 0x000806eb, pf_mask 0xd0, 2021-01-05, rev 0x00ea, size 104448
 002/118: sig 0x000806ec, pf_mask 0x94, 2021-01-05, rev 0x00ea, size 104448
 002/119: sig 0x00090661, pf_mask 0x01, 2021-02-04, rev 0x0011, size 19456
 002/120: sig 0x000906c0, pf_mask 0x01, 2021-03-23, rev 0x001d, size 19456
 002/121: sig 0x000906e9, pf_mask 0x2a, 2021-01-05, rev 0x00ea, size 104448
 002/122: sig 0x000906ea, pf_mask 0x22, 2021-01-05, rev 0x00ea, size 102400
 002/123: sig 0x000906eb, pf_mask 0x02, 2021-01-05, rev 0x00ea, size 104448
 002/124: sig 0x000906ec, pf_mask 0x22, 2021-01-05, rev 0x00ea, size 103424
 002/125: sig 0x000906ed, pf_mask 0x22, 2021-01-05, rev 0x00ea, size 103424
 002/126: sig 0x000a0652, pf_mask 0x20, 2021-02-07, rev 0x00ea, size 93184
 002/127: sig 0x000a0653, pf_mask 0x22, 2021-03-08, rev 0x00ea, size 94208
 002/128: sig 0x000a0655, pf_mask 0x22, 2021-03-08, rev 0x00ec, size 94208
 002/129: sig 0x000a0660, pf_mask 0x80, 2020-12-08, rev 0x00e8, size 94208
 002/130: sig 0x000a0661, pf_mask 0x80, 2021-02-07, rev 0x00ea, size 93184
 002/131: sig 0x000a0671, pf_mask 0x02, 2021-04-11, rev 0x0040, size 100352
iucode-tool: processed 261 valid microcode(s), 263 signature(s), 174 unique
signature(s)
iucode-tool: selected 131 microcode(s), 132 signature(s)
root@del40:~#



4. root@del40:~# cat /etc/default/intel-microcode
# Configuration script for intel-microcode version 3

#
# initramfs helper
#

# Set this to "no" to disable automatic microcode updates on boot;
# Set this to "auto" to use early initramfs mode automatically (default);
# Set this to "early" to always attempt to create an early initramfs;
#IUCODE_TOOL_INITRAMFS=auto

# Set this to "yes" (default) to use "iucode_tool --scan-system" to reduce
# the initramfs size bloat, by detecting which Intel processors are active
# in this system, and installing only their microcodes.
#
# Set this to "no" to either include all microcodes, or only the microcodes
# selected through the use of IUCODE_TOOL_EXTRA_OPTIONS below.
#
# WARNING: including all microcodes will increase initramfs size greatly.
# This can cause boot issues if the initramfs is already large.
#IUCODE_TOOL_SCANCPUS=yes

# Extra options to pass to iucode_tool, useful to forbid or to
# force the inclusion of microcode for specific processor signatures.
# See iucode_tool(8) for details.
#IUCODE_TOOL_EXTRA_OPTIONS=""
root@del40:~#

5.dpkg -s initramfs-tools dracut
Package: initramfs-tools
Status: install ok installed
Priority: optional
Section: utils
Installed-Size: 111
Maintainer: Debian kernel team <debian-kernel@lists.debian.org>
Architecture: all
Multi-Arch: foreign
Version: 0.133+deb10u1
Provides: linux-initramfs-tool
Depends: initramfs-tools-core (= 0.133+deb10u1), linux-base
Suggests: bash-completion
Breaks: e2fsprogs (<< 1.42.13), initscripts (<< 2.88dsf-59.3~), upstart
Conflicts: linux-initramfs-tool, usplash (<< 0.5.50)
Conffiles:
/etc/initramfs-tools/update-initramfs.conf e2026d4603e7161efaccca519aeb1297
/etc/kernel/postinst.d/initramfs-tools 0d9cc4eb58a5e2726911ca55d7719635
/etc/kernel/postrm.d/initramfs-tools f414d7d4a1210624ff6ef6ed96ca7061
Description: generic modular initramfs generator (automation)
This package builds a bootable initramfs for Linux kernel packages.  The
initramfs is loaded along with the kernel and is responsible for
mounting the root filesystem and starting the main init system.

dpkg-query: package 'dracut' is not installed and no information is
available
Use dpkg --info (= dpkg-deb --info) to examine archive files.
root@del40:~#

Thank you.

...


Well, the good news is that it is *not* the microcode update itself
causing a problem, if a previous version of intel-microcode works for
you.  There were no changes in the microcode update for your specific
processor for some time now.

My best guess is that the *image size* of the initramfs might be causing
issues.  Which is a kernel or initramfs bug of some sort most likely,
but it would be quite hard to track down.  Let's try to work around it.

(this happens because, since sometime ago, intel-microcode adds a lot of
microcode updates in "fits most systems" initramfs setups (which are now
the default -- MODULES is set to "most" in the initramfs-tools config).
Yeah, this sort of contradicts some of the comments in
/etc/default/intel-microcode)


Please enable (remove the #) the

IUCODE_TOOL_SCANCPUS=yes

line in /etc/default/intel-microcode

That change will force intel-microcode to only add microcode updates
that might be required for your processor, regardless of the MODULES
setting of initramfs-tools.

Then regenerate the initramfs, to apply the change.  Run as root:

update-initramfs -u

and look in /boot (e.g. with ls -l), the resulting initrd file for your
current kernel should be smaller, now.

This will greatly reduce the size of the initramfs image, and should fix
your issue with intel-microcode package updates.

Please test and report back if this workaround fixed the issue you had,
if it does, I may have to switch that default back to force the scan...

Thank you for the update.
I did it and now system is more, more stable - more than 3 days without
crash.
Only one strange behavior - mouse cursor takes different forms after a
while - some time is big square, some time is vertical line and some time
is not displayed correctly.
Please see attached screenshot. Strange thing is that on screenshot it is a
normal cursor, but is a vertical line - please see the flame on the desktop
- it is halved by mouse cursor now.