On 09/27/2011 05:15 AM, Muhammad Panji wrote: > Dear All, > I have an onboard Realtek RTL8111/8168B NIC. from lspci -vv : > > 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. > RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02) > > It is detected, but why the speed is always 100Mbps, already change > cable but still no luck. I use ethtool and from the output it seems > that system know that this NIC support gigabit speed : > > > Supported link modes: 10baseT/Half 10baseT/Full > 100baseT/Half 100baseT/Full > 1000baseT/Full > Supports auto-negotiation: Yes > Advertised link modes: 10baseT/Half 10baseT/Full > 100baseT/Half 100baseT/Full > 1000baseT/Full > > have change the driver r8169 with r8168 and follow the guide on CentOS > wiki http://wiki.centos.org/AdditionalResources/HardwareList/RealTekRTL8111b > but still it only get 100Mbps speed. > > I user kernel 2.6.18-274.3.1.el5 and 2.6.18-274.3.1.el5-PAE. on > another machine with the same specs I use kernel 2.6.18-238.9.1.el5 > and the gigabit speed works. > > Any idea why this happened and how to solve it? Thank you. > Regards, If your system is using the r8169 driver for this device then you'll probably need a different driver to get it working? I've got this in my Fedora 15 system and I needed to manually install the r8168 driver to make things work. Check this out for the details: http://wiki.linuxmce.org/index.php/Realtek_8168 Regards, Dennis