From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ben Greear <greearb@candelatech.com>
Date: Fri, 18 Dec 2020 11:41:48 -0800
Subject: [Intel-wired-lan] 5.10.0 kernel regression for 2.5Gbps link
 negotiation?
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That is going to be a bit painful to implement.

Any chance we can get a compile time option to enable 2.5 and 5Ghz by default,
with user option to disable those rates in case they find problems?

Thanks,
Ben

On 12/18/20 11:27 AM, Fujinaka, Todd wrote:
> Yes, and I'm plugging the hole in the README right now. Here's the proposed text:
> 
> Advertisements for 2.5G and 5G on the x550 were turned off by default due to
> interoperability issues with certain switches. To turn them back on, use
> 
> ethtool -s <ethX> advertise N
> 
> where N is a combination of the following.
> 
> 100baseTFull    0x008
> 1000baseTFull   0x020
> 2500baseTFull   0x800000000000
> 5000baseTFull   0x1000000000000
> 10000baseTFull  0x1000
> 
> For example, to turn on all modes:
> ethtool -s <ethX> advertise 0x1800000001028
> 
> For more details please see the ethtool man page.
> 
> Todd Fujinaka
> Software Application Engineer
> Data Center Group
> Intel Corporation
> todd.fujinaka at intel.com
> 
> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf Of Ben Greear
> Sent: Friday, December 18, 2020 10:08 AM
> To: intel-wired-lan <intel-wired-lan@lists.osuosl.org>
> Subject: [Intel-wired-lan] 5.10.0 kernel regression for 2.5Gbps link negotiation?
> 
> Hello,
> 
> One of our users reports that our 5.10 kernel negotiates the 1/2.5/5/10g NIC to 1Gbps instead of 2.5Gbps.  Booting the 5.4 kernel shows 2.5Gbps as expected.
> 
> I have not yet tried to bisect this...is it a known issue?
> 
> Thanks,
> Ben
> 
> --
> Ben Greear <greearb@candelatech.com>
> Candela Technologies Inc  http://www.candelatech.com _______________________________________________
> Intel-wired-lan mailing list
> Intel-wired-lan at osuosl.org
> https://lists.osuosl.org/mailman/listinfo/intel-wired-lan
> 


-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com