I installed proxmox 5.2 and run commands you suggested after first boot
root@pvenode8:~# dmesg -l warn
[ 0.052103] #2 #3 #4 #5
[ 0.172791] mtrr: your CPUs had inconsistent variable MTRR settings
[ 0.310070] ACPI: PCI Interrupt Link [LUB0] enabled at IRQ 23
[ 0.884531] ACPI: PCI Interrupt Link [LUB2] enabled at IRQ 22
[ 1.547231] [Firmware Warn]: GHES: Poll interval is 0 for generic hardware error source: 1, disabled.
[ 1.768600] ACPI: PCI Interrupt Link [LSA0] enabled at IRQ 21
[ 1.769997] ACPI: PCI Interrupt Link [LSA1] enabled at IRQ 20
[ 1.772070] ACPI: PCI Interrupt Link [LMAC] enabled at IRQ 23
[ 1.772479] ACPI: PCI Interrupt Link [LNEB] enabled at IRQ 19
[ 1.773024] aacraid 0000:07:00.0: can't disable ASPM; OS doesn't have ASPM control
[ 1.773744] aacraid: Comm Interface enabled
[ 1.778118] ACPI: PCI Interrupt Link [LE3B] enabled at IRQ 43
[ 1.937066] ACPI: PCI Interrupt Link [LNEA] enabled at IRQ 18
[ 2.097267] ACPI: PCI Interrupt Link [LNED] enabled at IRQ 17
[ 2.257192] ACPI: PCI Interrupt Link [LNEC] enabled at IRQ 16
[ 2.320858] ACPI: PCI Interrupt Link [LMAD] enabled at IRQ 22
[ 2.864919] ACPI: PCI Interrupt Link [LSA2] enabled at IRQ 21
[ 3.374308] mlx4_core 0000:83:00.0: Requested number of MACs is too much for port 1, reducing to 1
[ 3.374311] mlx4_core 0000:83:00.0: Requested number of VLANs is too much for port 1, reducing to 1
[ 4.099758] ACPI: PCI Interrupt Link [IIM0] enabled at IRQ 47
[ 4.656916] ACPI: PCI Interrupt Link [IIM1] enabled at IRQ 46
[ 5.200881] ACPI: PCI Interrupt Link [ISI0] enabled at IRQ 45
[ 5.202480] ACPI: PCI Interrupt Link [ISI1] enabled at IRQ 44
[ 5.203432] ACPI: PCI Interrupt Link [ISI2] enabled at IRQ 47
[ 14.116531] spl: loading out-of-tree module taints kernel.
[ 14.121195] znvpair: module license 'CDDL' taints kernel.
[ 14.121197] Disabling lock debugging due to kernel taint
[ 14.771197] ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 19
[ 16.534663] device-mapper: thin: Data device (dm-3) discard unsupported: Disabling discard passdown.
[ 17.716772] new mount options do not match the existing superblock, will be ignored
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root@pvenode8:~# dmesg -l err
[ 1.547131] ERST: Failed to get Error Log Address Range.
[ 1.663332] APEI: Can not request [mem 0xd7fb8830-0xd7fb8883] for APEI BERT registers
[ 3.374321] mlx4_core 0000:83:00.0: command 0x34 failed: fw status = 0x2
[ 3.374387] mlx4_core 0000:83:00.0: Fail to get port 1 uplink guid
[ 3.374452] mlx4_core 0000:83:00.0: command 0x34 failed: fw status = 0x2
[ 3.374513] mlx4_core 0000:83:00.0: Fail to get port 2 uplink guid
[ 3.374571] mlx4_core 0000:83:00.0: Fail to get physical port id
[ 8.730955] print_req_error: I/O error, dev sr0, sector 1252960
[ 10.362073] print_req_error: I/O error, dev sr0, sector 1252964
[ 10.362132] Buffer I/O error on dev sr0, logical block 313241, async page read
[ 10.998074] print_req_error: I/O error, dev sr0, sector 248
[ 11.288948] print_req_error: I/O error, dev sr0, sector 248
[ 11.289004] Buffer I/O error on dev sr0, logical block 62, async page read
[ 11.295197] print_req_error: I/O error, dev sr0, sector 252
[ 11.295254] Buffer I/O error on dev sr0, logical block 63, async page read
[ 11.581948] print_req_error: I/O error, dev sr0, sector 512
[ 11.593198] print_req_error: I/O error, dev sr0, sector 512
[ 11.593280] Buffer I/O error on dev sr0, logical block 128, async page read
[ 12.436948] print_req_error: I/O error, dev sr0, sector 516
[ 12.437030] Buffer I/O error on dev sr0, logical block 129, async page read
[ 12.444073] print_req_error: I/O error, dev sr0, sector 4096
[ 12.444155] Buffer I/O error on dev sr0, logical block 1024, async page read
[ 12.465948] print_req_error: I/O error, dev sr0, sector 4100
[ 12.466029] Buffer I/O error on dev sr0, logical block 1025, async page read
[ 12.488064] Buffer I/O error on dev sr0, logical block 313238, async page read
[ 12.508938] Buffer I/O error on dev sr0, logical block 313239, async page read
[ 12.530938] Buffer I/O error on dev sr0, logical block 313238, async page read
[ 14.661600] k10temp 0000:00:18.3: unreliable CPU thermal sensor; monitoring disabled
[ 14.661773] k10temp 0000:00:19.3: unreliable CPU thermal sensor; monitoring disabled
[ 14.807763] Error: Driver 'pcspkr' is already registered, aborting...