On 4/14/2025 3:18 PM, Marek Marczykowski-Górecki wrote:
Hi,
After updating to 6.14.2, the ethernet adapter is almost unusable, I get over 30% packet loss. Bisect says it's this commit:
commit 85f6414167da39e0da30bf370f1ecda5a58c6f7b Author: Vitaly Lifshits <vitaly.lifshits@intel.com> Date: Thu Mar 13 16:05:56 2025 +0200 e1000e: change k1 configuration on MTP and later platformsMy system is Novacustom V540TU laptop with Intel Core Ultra 5 125H. And the e1000e driver is running in a Xen HVM (with PCI passthrough). Interestingly, I have also another one with Intel Core Ultra 7 155H where the issue does not happen. I don't see what is different about network adapter there, they look identical on lspci (but there are differences about other devices)...
I see the commit above was already backported to other stable branches too...
#regzbot introduced: 85f6414167da39e0da30bf370f1ecda5a58c6f7b
Thank you for this report.
Do you see the high packet loss without the virtualization? Can you please share the lspci output? Does your switch/link partner support flow control? if it is configurable can you try to enable it? Do you see any errors in dmesg related to the e1000e driver?