Re: [Intel-wired-lan] [PATCH iwl-net v3] e1000e: Reconfigure PLL clock gate timeout and re-enable K1 on Meteor Lake

[Jacob Keller <jacob.e.keller@intel.com>]

On 5/6/2026 2:59 AM, Thorsten Leemhuis wrote:
> On 4/17/26 12:43, Dima Ruinskiy wrote:
>> Commit 3c7bf5af21960 ("e1000e: Introduce private flag to disable K1")
>> disabled K1 by default on Meteor Lake and newer systems due to packet
>> loss observed on various platforms. However, disabling K1 caused an
>> increase in power consumption.
>>
>> To mitigate this, reconfigure the PLL clock gate value so that K1 can
>> remain enabled without incurring the additional power consumption.
>> Re-enable K1 by default, but keep the private flag to support disabling
>> it via ethtool. Additionally, introduce a DMI quirk table, so that K1 may
>> be disabled by default on known problematic systems. Currently, this
>> includes the Dell Pro 16 Plus, where the issue has been reported to persist
>> despite the changes to the PLL lock timeout.
>>
>> Link: https://bugzilla.kernel.org/show_bug.cgi?id=220954
>> Link: https://lists.osuosl.org/pipermail/intel-wired-lan/Week-of-Mon-20250623/048860.html
>> Link: https://lists.osuosl.org/pipermail/intel-wired-lan/Week-of-Mon-20260330/054059.html
> 
> What happened to this fix for a regression first reported in January? It
> looks like it fell through the cracks. Or was some other solution found?
> 
> Ciao, Thorsten
> 
There has been a bunch of back and forth discussion and varying versions
of a fix for this. Its still in the Intel Wired LAN queue, and is
currently waiting for one the E1000E team to report testing completed.

Thanks,
Jake