linux-kernel - Re: Strange output on the console

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Date:   Fri, 25 Feb 2022 08:28:50 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Willy Tarreau <w@....eu>
Cc:     David Laight <David.Laight@...lab.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        John Ogness <john.ogness@...utronix.de>
Subject: Re: Strange output on the console

On Fri, 25 Feb 2022 13:25:46 +0100
Willy Tarreau <w@....eu> wrote:

> ... and Steven having fun reading our proposals after having made this
> up entirely in preparation of the next April's fool :-)

Here's more about the joke ;-)

On another machine that has the same issue but with different characters, I
captured the output from the console, but also took the output from dmesg
(both are attached).

The console has:

[    5.886056] thermal LNXTHERM:00: registered as thermal_zone0
[    5.891773] ACPI: thermal: Thermal Zone [TZ00] (28 C)
[    5.897082] thermal LNXTHERM:01: registered as thermal_zone1
[    5.902800] ACPI: thermal: Thermal Zone [TZ01] (30 C)
[    5.908053] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
.0I 15
10y0e 
9No
 Lt
2t.d)
.t v
6be
 a20tp
0a2ni 
 s
 s
1s
 s
[..]


and dmesg has:

[    5.897082] thermal LNXTHERM:01: registered as thermal_zone1
[    5.902800] ACPI: thermal: Thermal Zone [TZ01] (30 C)
[    5.908053] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    5.914461] 00:08: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[    5.916204] 0000:00:16.3: ttyS1 at I/O 0xf0e0 (irq = 19, base_baud = 115200) is a 16550A
[    5.917161] Non-volatile memory driver v1.3
[    5.917617] Linux agpgart interface v0.103
[    5.922965] tpm_tis 00:09: 1.2 TPM (device-id 0xB, rev-id 16)
[    5.988960] tpm tpm0: TPM is disabled/deactivated (0x7)
[    6.001410] brd: module loaded
[    6.001865] ahci 0000:00:1f.2: version 3.0
[    6.012113] ahci 0000:00:1f.2: AHCI 0001.0300 32 slots 6 ports 6 Gbps 0x5 impl SATA mode
[    6.012804] ahci 0000:00:1f.2: flags: 64bit ncq pm led clo pio slum part ems apst 
[    6.016433] scsi host0: ahci
[    6.017170] scsi host1: ahci
[    6.017730] scsi host2: ahci
[    6.018326] scsi host3: ahci
[    6.018880] scsi host4: ahci
[    6.019469] scsi host5: ahci
[    6.019921] ata1: SATA max UDMA/133 abar m2048@...7c36000 port 0xf7c36100 irq 24


The ending has:

For console:

[..]
.Kp
6Kt
[K-g
 Ke
1iah
3inc
 inc
6inc
1inc
6inc
6inc
1inc
6inc
6itu
6a 
.a c
6Pe
8tm
6R r
[   16.841072] Freeing unused decrypted memory: 2036K
[   16.846604] Freeing unused kernel image (initmem) memory: 2372K
[   16.857905] Write protecting the kernel read-only data: 22528k


For dmesg:

[..]
[   16.624186] Key type fscrypt-provisioning registered
[   16.627743] Key type encrypted registered
[   16.628167] ima: Allocated hash algorithm: sha1
[   16.634951] ima: Error Communicating to TPM chip
[   16.645952] ima: Error Communicating to TPM chip
[   16.656946] ima: Error Communicating to TPM chip
[   16.667939] ima: Error Communicating to TPM chip
[   16.678937] ima: Error Communicating to TPM chip
[   16.689943] ima: Error Communicating to TPM chip
[   16.700938] ima: Error Communicating to TPM chip
[   16.710941] ima: Error Communicating to TPM chip
[   16.726787] ima: No architecture policies found
[   16.746928] alg: No test for 842 (842-scomp)
[   16.747440] alg: No test for 842 (842-generic)
[   16.838166] PM:   Magic number: 10:503:332
[   16.838607] tty tty53: hash matches
[   16.839099] RAS: Correctable Errors collector initialized.
[   16.841072] Freeing unused decrypted memory: 2036K
[   16.846604] Freeing unused kernel image (initmem) memory: 2372K
[   16.857905] Write protecting the kernel read-only data: 22528k
[   16.864836] Freeing unused kernel image (text/rodata gap) memory: 2036K
[   16.871969] Freeing unused kernel image (rodata/data gap) memory: 1180K

-- Steve

Download attachment "dmesg" of type "application/octet-stream" (74613 bytes)

View attachment "console.txt" of type "text/plain" (37710 bytes)