Red Hat Bugzilla – Bug 489255
r8169 module incorrectly treats RTL8101E as a gigabit device
Last modified: 2017-02-27 17:28:57 EST
Description of problem:
My ethernet adapter,
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)
Subsystem: Dell Device 02b0
works fine on 100mbps networks, but does not work when connected to a gigabit switch. It appears that the kernel module is trying to initialize it at 1000mbps, which the device does not support.
The status LEDs never light up and attempts to get a DHCP address always times out.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Connect to gigabit ethernet
2. ifup eth0
3. dhclient eth0
Connection times out. Observing the physical port, LEDs never come up. dmesg shows an error regarding the device not supporting gigabit speeds (will attach actual error later; not at work right now)
Should fallback gracefully to 100mbps
This dates back to kernel 2.6.24 at the latest (shipped with Dell's Mini Ubuntu distribution). Using that, I managed, somehow, to get a DHCP reply once, but otherwise the symptoms are the same.
Can you post the output of 'lspci -vnn' against that device?
And the exact error message?
This bug appears to have been reported against 'rawhide' during the Fedora 11 development cycle.
Changing version to '11'.
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