After investigation, I found that with 4.8 kernel, when the PHY is enabled, the link status is read from PHY. However, there are bug in current codes in both Marvell 88E1512 PHY and xgene-mdio drivers, the link status is wrongly read. The issue can be resolved when applying two below patches: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/net/phy/marvell.c?id=a13c06525ab9ff442924e67df9393a5efa914c56 https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/drivers/net/phy/mdio-xgene.c?id=4b72436dc3dd2457056b22d6f147777368c869fa
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1686305 Title: Merlin SGMII fail on Ubuntu Xenial HWE kernel Status in linux package in Ubuntu: New Bug description: Using the Ubuntu Xenial HWE installation image at http://ports.ubuntu.com/ubuntu-ports/dists/xenial-updates/main/installer-arm64/current/images/hwe-netboot to install Ubuntu into the Merlin board, the SGMII port is fail to get IP from DHCP. After installation, booting into Linux prompt, the SGMII port is fail to get IP from DHCP also. Checking with ethtool, the link is always report down. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1686305/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
