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[SOLVED] dmesg is not showing from 0.000000
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papu
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Joined: 25 Jan 2008
Posts: 605
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PostPosted: Tue Nov 22, 2016 5:08 pm    Post subject: [SOLVED] dmesg is not showing from 0.000000 Reply with quote

hi :) this is my emerge --info https://paste.pound-python.org/show/m7wYlBjPQDIxnlVTU1L0/

i recenlly reinstall gentoo due and cpu update, when i want to see full dmesg it start from [ 0.944451] timestamp and not from [ 0.000000]

Code:
~ $ dmesg
[    0.944451] device: 'device:01': device_add
[    0.944452] bus: 'acpi': add device device:01
[    0.944454] PM: Adding info for acpi:device:01
[    0.944505] device: 'device:02': device_add
[    0.944506] bus: 'acpi': add device device:02
[    0.944508] PM: Adding info for acpi:device:02
[    0.944559] device: 'device:03': device_add
[    0.944560] bus: 'acpi': add device device:03
[    0.944563] PM: Adding info for acpi:device:03
.....
[   20.380048] devices_kset: Moving 4-9.3:1.1 to end of list
[   20.381538] device: 'lp0': device_add
[   20.381559] PM: Adding info for No Bus:lp0
[   20.381655] usblp 4-9.3:1.1: usblp0: USB Bidirectional printer dev 4 if 1 alt 0 proto 2 vid 0x04A9 pid 0x1771
[   20.381657] driver: 'usblp': driver_bound: bound to device '4-9.3:1.1'
[   20.381673] bus: 'usb': really_probe: bound device 4-9.3:1.1 to driver usblp
[   20.381681] usbcore: registered new interface driver usblp


using SystemRescueCd i can see all timestamps from 0 to end of dmesg

any ideas?

thanks :roll:
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--Intel i5 6600 --GA-Z170-HD3P --Ripjaws V 2x8 2400 --Radeon RX 470 G1 4G --Gentoo & Windows


Last edited by papu on Tue Nov 22, 2016 5:39 pm; edited 1 time in total
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eccerr0r
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Joined: 01 Jul 2004
Posts: 7274
Location: almost Mile High in the USA

PostPosted: Tue Nov 22, 2016 5:14 pm    Post subject: Reply with quote

Your kernel's ring buffer ran out and the first entries were removed for new entries.

Simply set CONFIG_LOG_BUF_SHIFT and CONFIG_LOG_CPU_MAX_BUF_SHIFT larger in your kernel config.
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papu
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Joined: 25 Jan 2008
Posts: 605
Location: Sota algun pi o alzina...

PostPosted: Tue Nov 22, 2016 5:39 pm    Post subject: Reply with quote

yeah now works with 19!

Quote:
~ $ cat /usr/src/linux/.config | egrep CONFIG_LOG_
CONFIG_LOG_BUF_SHIFT=19
CONFIG_LOG_CPU_MAX_BUF_SHIFT=12


:wink:
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