Hi, We got an acer laptop which has a problem with ethernet networking after resuming from S3. The ethernet is popular realtek r8168. The lspci shows as follows. 02:00.1 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 12)
The problem is the ethernet is not accessible after resume. Pinging via ethernet always shows the response `Destination Host Unreachable`. However, the interesting part is, when I run tcpdump to monitor the problematic ethernet interface, the networking is back to alive. But it's dead again after I stop tcpdump. One more thing, if I ping the problematic machine from others, it achieves the same effect as above tcpdump. Maybe it's about the register setting for RX path? I tried the latest 4.20 rc version but the problem still there. I also tried some hw_reset or init thing in the resume path but no effect. Any suggestion for this? Thanks Chris