Description of problem: realtec interfaces runs with degraded link speed Version-Release number of selected component (if applicable): kernel-3.5.3-1.fc17.x86_64 How reproducible: Always Steps to Reproduce: 1. ifup ethx 2. ethtool ethx Actual results: 100Mb/s half duplex Expected results: 1000Mb/s full duplex Additional info: # lspci|grep Eth 04:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection 07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03) 09:01.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8110SC/8169SC Gigabit Ethernet (rev 10) The two realtec use r8169 and run at degraded link speed. The intel uses e1000e and runs at full link speed. ifup-eth2 (8111/8168B) brings up the link in 100Mb/s half duplex instead of 1000MB/s full duplex. Trying to enable full duplex with 'ethtool -s eth2 speed 100 duplex full' makes it just worse. The first call degrades the speed to 10Mb/s with no output from ethtool. The second call takes down the link. The link can be brought up to 100Mb/s full duplex manually: # ethtool -s eth2 speed 100 duplex full autoneg off # ethtool eth2 Settings for eth2: Supported ports: [ TP MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Half 1000baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: Not reported Advertised pause frame use: No Advertised auto-negotiation: No Speed: 100Mb/s Duplex: Full Port: MII PHYAD: 0 Transceiver: internal Auto-negotiation: off Supports Wake-on: pumbg Wake-on: g Current message level: 0x00000033 (51) drv probe ifdown ifup Link detected: yes Unfortunately requesting 1000Mb/s fails on both realtec interfaces (but works on the Intel one): # ethtool -s eth2 speed 1000 duplex full autoneg off Cannot set new settings: Invalid argument not setting speed not setting duplex not setting autoneg
(In reply to comment #0) [...] > # ethtool -s eth2 speed 1000 duplex full autoneg off > Cannot set new settings: Invalid argument > not setting speed > not setting duplex > not setting autoneg Gigabit mandates autonegotiation. The driver does not even try to enable gigabit speed without autoneg. Could you enable autoneg again and send 'mii-tool -vv eth2' ? Please check that it does not change over time. lspci displays all 8168 as 8168b. Please provide a complete dmesg to identify the specific 816x device Thanks. -- Ueimor
Created attachment 688901 [details] requested output I rebooted the machine with the kernel 3.7.3-101.fc17.x86_64 and eth2 attached to a printer with the link speed manually locked to 100/full duplex. eth2 was brought up by network scripts with default options. eth2 was in 100/half duplex after boot. The file mii-tool.out-0 contains the output from 'mii-tool -vv eth2'. I removed the cable and attached it again with similar result. (mii-tool.out-1) I removed the cable from eth2 again. I also removed the cable from eth0 which has a gigabit switch in the other end and attached it to eth2 instead. eth2 reports no link when connected to the gigabit switch. (mii-tool.out-2-gigabit) I switched back the cables again. eth0 back in gigabit mode as before and eth2 in 100/half duplex. (mii-tool.out-3) The file dmesg contains output from dmesg after the elaboration.
Are you still seeing this with the 3.9.4 kernel in updates-testing?
I tried 3.9.4 with same result.
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