Messages in this thread | | | Subject | Re: [Intel-wired-lan] [PATCH] e1000e: Power cycle phy on PM resume | From | Paul Menzel <> | Date | Thu, 24 Sep 2020 15:02:36 +0200 |
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Dear Andrew,
Am 23.09.20 um 21:28 schrieb Andrew Lunn: >>>> How much does this increase the resume time? > > Define resume time? Until you get the display manager unlock screen? > Or do you need working networking?
Until network is functional again. Currently, the speed negotiation alone takes three(?) seconds, so making it even longer is unacceptable. (You wrote it below.)
> It takes around 1.5 seconds for auto negotiation to get a link. I know > it takes me longer than that to move my fingers to the keyboard and > type in my password to unlock the screen. So by the time you actually > get to see your desktop, you should have link.
Not here.
> I've no idea about how the e1000e driver does link negotiation. But > powering the PHY off means there is going to be a negotiation sometime > later. But if you don't turn it off, the driver might be able to avoid > doing an autoneg if the PHY has already done one when it got powered > up.
Indeed.
Kind regards,
Paul
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