CentOS 5 Hardware :: Realtek RTL8111/8168B Operating In Half Duplex Mode?

Oct 12, 2010

I have an Asus P6T7 WS motherboard with 2 embedded NIC's.Relevant output from lspci:

0a:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)
0b:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)
uname -a:

I am running a mail server and my POP3 clients have started complaining of slow speeds, about 10 days back. This prompted me to take remedial action on many fronts, finally I decided to look at the link itself.Attempts to force the NIC into full duplex mode using ethtool have failed. The command runs and throws me back to the prompt, but the NIC remains in half duplex mode.

Command that I have tried: ethtool -s eth1 speed 100 duplex full autoneg on modprobe -l r816*:


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Ubuntu Networking :: Realtek RTL8111/8168B (rev 03) (dell Studio 1558)?

Jun 14, 2010

I've been having problems trying to connect to my home network with my onboard NIC. No solution given on the forum has helped me so far.. I just can't seem to connect to the network and I have no idea how to fix it. My NIC is recognized (lsmod shows r8168 is loaded) but when I choose 'auto ethernet' nothing happens .I hope there is someone that can help me because It's a pain to not have internet access...

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CentOS 5 Networking :: Server Lagging After Backup (RTL8111/8168B REV 02)

Jun 21, 2009

I have 2 dedicated servers, one with RTL8111/8168B (rev 02) and one with RTL8111/8168B (rev 01) both running centos 5.3, the problem is like this, all things run great on the dedicated server with NIC RTL8111/8168B (rev 02) until we run backup (cpanel backup) after the backup is finish the server lags , no high load, just lags, the server is a 8 GB ram, i7 quad core, so there is no load problem or someting like this, the second server has also cpanel on it and it has no lag but it has RTL8111/8168B (rev 01) , we think that the problem is with the RTL8111/8168B (rev 02) should we update the driver ?

Here is the output from it:
2.6.18-128.1.10.el5 x86_64 x86_64
06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02) .....

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CentOS 5 Networking :: RTL8111 / 8168B Not Working In Dell Studo Hybrid - Sort It?

Jan 30, 2009

This week I picked up a Dell Studio Hybrid and installed CentOS on it. I originally used 5.0 since I already had the DVD and the network card wasn't recognized at all (lspci recognized it but the card didn't show up in system-config-network). I then downloaded the 5.2 DVD and installed that. The network card then showed up in system-config-network but it still didn't work. If DHCP is enabled it tells me that no link is present, and if I manually configure it, I still can't ping the router. lspci reports the following about the network card:

02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)

The driver used is r8169.

I put Fedora 10 on it and the network is working fine, but I'd rather run CentOS on this machine. Is the issue likely to be fixed with CentOS 5.3 or should I just stick with Fedora?

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Software :: Can't Change From Half-duplex To Full-duplex On A Gigabit Nic

May 29, 2010

I'm trying to change duplex mode on a debian box without success:

root@k2:~# ethtool eth0
Settings for eth0:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full


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CentOS 5 :: Network 10Mb/s Half Duplex Only. R8168 ?

May 24, 2011

For some reason my network card started going 10Mb/s half duplex instead of 1000Mb/s full duplex. System is connected to 8x1Gb HP switch.Other devices connect fine through the switch and get full 1Gb network.I have Centos 5 with all updates. Driver comes from elrepo and as well is updated.

[root@host ~]# modinfo r8168
filename: /lib/modules/2.6.18-238.9.1.el5/weak-updates/r8168/r8168.ko
version: 8.023.00-NAPI[code].....

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Ubuntu Networking :: Can't Configure The Wireless RTL8111/8168B

Apr 19, 2010

I have an MSI Megabook M662. Can't get my wireless working. I have "enabled" checked, but can't view any connections. I don't have wireless at home, I'm trying to make this work for free connections at the library, etc. From the Help Menu troubleshooting I tried:

mag@MSIubuntu:~$ sudo lshw -C network
[sudo] password for mag:
description: Ethernet interface


This reports Disabled, and the advice is to check that device is on. But I just want to roam for service, I don't have my own wireless at home. I thought I might need to use ndiswrapper but I cannot locate a driver for this card info:

lspci -nn 02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller [10ec:8168] (rev 01)

What should I try now?

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Debian Hardware :: Slow Outgoing Network Speed With RTL8111 / 8168B

Sep 18, 2014

I'm experiencing very slow network speeds in one direction (out) on a clean install of debian.

iperf client running on laptop connecting to server with issue:
Code: Select all$ iperf -c -d
Server listening on TCP port 5001
TCP window size:  128 KByte (default)
Client connecting to, TCP port 5001
TCP window size:  129 KByte (default)
[  5] local port 55340 connected with port 5001
[  6] local port 5001 connected with port 52664
[ ID] Interval       Transfer     Bandwidth
[  5]  0.0-10.0 sec   247 MBytes   207 Mbits/sec
[  6]  0.0-11.5 sec  1.00 MBytes   730 Kbits/sec

I've tried with different cables on the server, no luck. Also note that the laptop gets full speed to speedtest.net as per my internet subscription (75/75 gbit fiber), so the laptop can be ruled out as a problem since it gets more than 75X performance to the internet compared to the local server.

The main purpose of this server is to be a virtualbox host. I've set up one guest system and ran iperf between the host/guest (bridged network). It gives better numbers, still the host -> guest direction is much slower than it should be:

Code: Select allClient connecting to, TCP port 5001
TCP window size:  108 KByte (default)
[  3] local port 48573 connected with port 5001
[  5] local port 5001 connected with port 48856
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  1.65 GBytes  1.42 Gbits/sec


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Networking :: Bonded NIC Showing Only Half-duplex?

May 10, 2011

root@test:~# mii-tool bond0 -v
bond0: 10 Mbit, half duplex, link ok
product info: vendor 00:01:00, model 0 rev 4
basic mode: 10 Mbit, half duplex
basic status: link ok

How do I change this to full duplex on bonded NICs? its all GigE NICs and Switch.

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Ubuntu Networking :: Get RealTek RTL8111 Wireless Working On 10.10?

Oct 20, 2010

The Realtek RTL8111 wireless does not work in Mint 10 or Ubuntu 10.10. Works perfectly in Mint 9 and Ubuntu 10.04. No proprietary driver necessary. Has anyone managed to get it working in Ubuntu 10.10? : You can click the one you want to connect to and enter your security key. I just use WEP because it's easy. I enter the key and the system just tries to connect until it times out. You can repeat this process indefinitely. Wired works fine but after any available updates are installed, still no wireless capability.

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Jun 30, 2011

My wireless download rate is absurdly low (0.3 mbps) compared to a faster upload rate (1.5 mbps). My girlfriend's laptop running windows gets much higher download rate (20+ mbps).

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Dec 8, 2010

I am trying to do an HTTP-based 5.5 install. One thing I noticed: if I press Alt-F4 after specifying the network settings, it says:<6>bnx2: eth0 NIC Copper Link is Up, 100 Mbps half duplex

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Ubuntu :: Low Graphics Mode - Half Screen Missing

May 9, 2010

I have a new sony vaio VPCF11NFX/B with a fresh install of Lucid. I am using a VGA-out to a LCD monitor. It shows up and is recognized. I cannot get video to appear on my laptop monitor. Moreover, when I unplug my external monitor, I cannot boot into ubuntu. It brings me to low graphics mode and I can't do anything from there because half of the screen is missing.

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Hardware :: HDA Nvidia - Realtek ALC1200 - Stuck In Either 6ch Or 8ch Mode

Feb 17, 2010

Card=HDA Nvidia
Chip=Realtek ALC1200
Xubuntu 9.10 64
VLC (also use other video/audio players but this one is my main one.)

I have the speakers plugged into the headphone jack of the audio card. The problem is that I am stuck in either 6ch or 8ch mode, even with the headphone box checked and all relevant settings where they are suppose to be in alsamixer. I am missing sounds plus the volume is lower then it should be over all. Music, for example, does play but it is not the whole song. For example if I listen to one song, it stops all instruments and is suppose to play and guitar solo. But I don't hear it at all.

What I want to do is get it to work in 2ch. I am using Alsa but I have no idea what to edit, or if there is anything I can edit to get to 2ch. I do not want to use pulseaudio at all. One of the main reasons why I won't use Gnome (Ubuntu) right now. I have more headaches with that then I am with this problem.

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Ubuntu Installation :: System Half Is In English And Half In Another Language After Upgrading To 10.04

May 27, 2010

I just upgraded from 9.04 to 10.04 and so far I have those problems:

1. Before, everything in my system was in English. Now, half is in English, half in another language (PCManFM, some menus etc). I tried setting up Language Support but it changes nothing.

2. Cursor themes work only when hovering the mouse over "X" buttons in the right top corner of the window. As soon as I move the mouse somewhere else, it goes back to default cursor theme, even though I tried selecting 5 different themes - same result.

4. Hibernation don't work anymore. s2disk saves image to disk and then it resumes it but computer stops on text message along the lines of "Resume completed successfully".

5. Changing volume with keyboard shotcuts no longer works.

6. Smplayer does not display picture anymore when playing movies. The view is just empty. I can only hear the soundtrack. It is using XV filter.

7. PCmanFM that used to worked flawlessly, now after going into 1 or 2 subdirectories stops reacting to clicks on file/folder list. Need to open new instance to be able to do anything and this again would become unusable after visiting 1-2 folders.

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Ubuntu :: Half The Commands Enter Do Nothing And The Other Half Or Not Found Or Are Incorrect?

Jun 22, 2011

I'm not sure if this is the right place for this. I'm not sure which veraion of linux I have but it was the latest veraon bfor the recent update. I accidentally hit alt ctrl f11 and my comp went inyo the grub menu. I've tried startx and it does nothing. About half the commands I enter do nothing and the other half r not found or are incorrect. The only vommand thw actualley work is reboot. I searched for this and read a grub guide but it did no good.

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Server :: Change From Graphic Mode To Text Mode In CentOS 5.3?

Sep 14, 2009

The system always boot up in Graphic Mode. After installation of Web Server, I want to disable Graphic Mode and change it to boot to Text Mode to save memory. Is there a way to disable graphic mode?

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CentOS 5 Hardware :: Find Driver For Dell Wireless 1397 802.11b/g Half Mini Card?

Jan 5, 2010

Where can i find driver for Dell Wireless 1397 802.11b/g Half Mini Card. I'm using CentOS x86_64.

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CentOS 5 Networking :: RealTek NIC Would Not Work

Jun 8, 2009

I installed CentOS 5.3 Final on a machine today and was having some problems with the NIC. When I installed CentOs the NIC would not work, I looked in the network configuration and saw that neither of my two NICS had IRQ's so I arbitrarily gave them some and they both worked fine. I then ran yum -update, installed updates and rebooted my machine. Again, the NICs stopped working, only this time setting the IRQ did nothing. I did some googling and found this thread: [URL] The output from the first two commands is as follows:

[root@localhost ~]# uname -rmi
2.6.18-128.1.10.el5 i686 i386

[root@localhost ~]# /sbin/lspci | grep ther 05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit Ethernet (rev 10) 05:01.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit Ethernet (rev 10) I followed the steps outlined and my issue still remains.

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Aug 23, 2010

I've done some research for CentOS and Linux support in general for this card, and I haven't found the answer I'm looking for. Does anyone use this card in a system of theirs, and, if so, how easy was it to set up? It's on an Asus M4A785T-M/CSM motherboard that I'm looking to purchase (Newegg link here for reference). I've seen a lot of Realtek cards have zero problems in Linux before, but I know each chipset is different.

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CentOS 5 :: Installer Crashes With On-board Realtek 8111DL Enabled

Oct 27, 2009

I have a Biostar TA785GE which as I understand it, has a Realtek 8111DL on-board.

Booting with the default label from the 64-bit installation DVD crashes before any user input, with indecipherable text on-screen (text mode, not X11). Symptoms were the same with the Fedora 11 32-bit installation DVD and the Fedora 12 Live 32-bit CD. Booting with "linux text" mode shows a kernel panic in ":r8169:rtl8169_init_one+0x369/0x9d4" from "pci_device_probe+0x100/0x180".

Disabling the on-board NIC allowed the boot to proceed, and get as far as detecting the hard drive partitions (where I stopped it since Ubuntu is installed).

Ubuntu 9.04 Workstation(Desktop?) install DVD worked fine, and I've installed it and am using it to enter this. From Ubuntu 9.04 on this hardware:

- "uname -r" shows
Linux snoopy 2.6.28-16-generic #55-Ubuntu SMP Tue Oct 20 19:48:32 UTC 2009 x86_64 GNU/Linux
- "lsmod | egrep '816|811'" shows:


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CentOS 5 Hardware :: Realtek 8169SC Network Card Not Working

May 28, 2010

I am not very experienced using Linux but I never had big problems with Ubuntu. Now I am busy writing my PhD thesis and therefore I had to install CentOS to use one lousy program that I could not get to work under Ubuntu. However, it seems to be quite fine and it is working well besides one fact: The network card stopped working. In the beginning it was working fine although the speed was only on the level of 100mbit. The switch and the LED on the card indicated gbit connection, though. I tried to install the driver for the 8168 card which reduced the card to 100mbit (indicated by the LED on the switch and the card).

Ethtool indicated it was gbit capable but I couldn't activate it. After reading more and more I figured I have to use the 8169 driver again and live with the 100mbit. Unfortunately, after uninstalling the old driver and reinstalling the driver 8169 the network isn't working at all anymore. The network-manager displays the card as inactive and when I try to turn it on it complains about the wrong mac address, which I am not able to change to the proper one. I am using CentOS 5.5 with the latest updates.

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Jan 12, 2010

I'm new at Centos, although I am familiar with Redhat.I have a laptop that has Windows XP installed on it, and I want this to run Centos 5.3 instead.I read some tutorials online, where I found the download "CentOS-5.3-i386-LiveCD". I burned this to a DVD-RW. When I put the disk in my drive and look my my D: Drive it reads: DVD RW Drive (D:) CentOS-5.3-i386-LiveCD.>I am burning with Nero 7 Essentials.I place this in the laptop disk drive, bring up the BIOS, set it to boot from CD, and when I boot it up I get the message "No Operating System Found".I also tried this from another computer, Windows Vista Home Premium, and it skipped the priority boot (which I set to CD) and went right to the hard disk, booting up to Vista like normal.I hope I'm just doing something wrong.. When I go into the DVD, I first of all see a folder labeled "LiveOS" - Then inside -> -osmin - IMG File - 12.0 KB-squashfs - IMG File - 677 MB

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Sep 8, 2009

I just recently installed CentOS 5.3 and to make a long story short I found the entry for my wireless card under the network settings but when attempting to activate the card the system locks up. I have to reboot at that point as nothing responds (keyboard, mouse, etc..).

Running the command /sbin/lspci -v reveals the following about the wireless card:

01:00.0 Ethernet controller: Realtek Smeiconductor Co., Ltd. RTL-8185 IEEE 802.11a/b/g Wireless LAN Controller (rev 20)

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Feb 22, 2011

I am new to Linux. I will receive a new Dell desktop without any operating systems. Can anybody advise me how to install CentOS 5.5 on it?

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Jul 29, 2010

I am having a problem running CentOS 5.4 in VMware which have appeared with the following error.

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Oct 9, 2010

I installled Ubuntu 10.4.1 on a brand new computer with a Realtek RTL8111/8168B PCI Express Gigabit Ethernet controller on a Foxconn G41MXE motherboard. and I have been unable to connect to wireless network. I have gone through the wireless trouble shooting guide to no avail. When i "check for device recognition" i get the following (note the is no CLAIMED UNCLAIMED ENABLED OR DISABLED)

udo lshw -C network
description: Ethernet interface
product: RTL8111/8168B PCI Express Gigabit Ethernet controller


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CentOS 5 Hardware :: Audio Via Optical S/PDIF Output On On-board RealTek ALC885 HDA?

Mar 29, 2010

I can not get any output from the digital optical S/PDIF jack on my on-board audio device. But I am getting an analog signal from the headphone jack. I don't have an RCA S/PDIF cable, so I haven't tested the RCA S/PDIF jack. Below are my system specs and hardware info.

According to my MOBO (DFI Blood-Iron P45) manual, the Audio device is:
Realtek ALC885 HDA CODEC
8-channel audio output
Optical S/PDIF-out and coaxial RCA S/PDIF interfaces

There are 6 phone jacks (including 1 mic), an RCA S/PDIF, and an Optical S/PDIF jack on the MOBO. The output of alsa-info.sh is here:[URL]... Note that I tried several model options (6stack-dig, 6stack-dig-demo, intel-alc889a, auto) for the snd-hda-intel module, but none worked,

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Mar 22, 2010

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Dec 17, 2009

I`m looking for a a X-Window in CentOS. At the moment I work with console only in text mode

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