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#1 2014-01-23 22:19:50
- beetlejuice7
- Member
- Registered: 2012-02-28
- Posts: 49
Wireless slowly stops working after successful connection
Hi, thanks for reading.
I just installed Arch on a desktop machine I picked up a few days ago. I have a USB wireless adapter (rtl8188cus) which I am using for networking. The problem I have noticed is that shortly after successfully connecting, my wireless connectivity drops out. I was installing some packages and the transfer rate was +400K/s for the first 30 seconds or so, then it trickled down to a stop. It's worth noting that I do not "disconnect" at any point - things just stall out (transfer rates go to zero, ssh sessions become unresponsive). Nothing cropped up when I ran `journalctl -r`. After a few minutes the network was working again, only to die later.
So far the only things I have done are to:
* disable ipv6
* use google for dns
* disable dynamic interface names (it is always wlan0)
I know its not the router because my laptop, which is also on the lan, works fine the whole time. Any ideas are greatly appreciated.
Last edited by beetlejuice7 (2014-01-23 22:25:24)
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#2 2014-01-23 22:48:26
- ewaller
- Administrator
- From: Pasadena, CA
- Registered: 2009-07-13
- Posts: 20,354
Re: Wireless slowly stops working after successful connection
I have the impression you have more than one thing trying to control your wireless NIC. Ensure you are not trying to run netctl service at the same time your are running the wicd or NetworkManager services. Also, ensure you dot have the wpa_supplicant or dhcpcd services enabled if you are using one of the higher level packages (netctl, wicd, NetworkManager).
Verify this by looking at the output of systemctl
Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
Sometimes it is the people no one can imagine anything of who do the things no one can imagine. -- Alan Turing
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#3 2014-01-23 23:02:54
- beetlejuice7
- Member
- Registered: 2012-02-28
- Posts: 49
Re: Wireless slowly stops working after successful connection
That sounds plausible, because now that I think back I had no problems when I was installing arch and downloading the packages. I'm not sure what I might be looking for, so please if anything jumps out at you let me know:
Here is the output of `systemctl --all`:
proc-sys-fs-binfmt_misc.automount loaded active waiting Arbitrary Executable File Formats File System Automount Point
dev-cdrom.device loaded active plugged ATAPI_DVD_A_DH16AASH
dev-disk-by\x2did-ata\x2dATAPI_DVD_A_DH16AASH.device loaded active plugged ATAPI_DVD_A_DH16AASH
dev-disk-by\x2did-ata\x2dST3750528AS_6VP2HNGY.device loaded active plugged ST3750528AS
dev-disk-by\x2did-ata\x2dST3750528AS_6VP2HNGY\x2dpart1.device loaded active plugged ST3750528AS
dev-disk-by\x2did-usb\x2dGeneric\x2d_Compact_Flash_20060413092100000\x2d0:0.device loaded active plugged Compact_Flash
dev-disk-by\x2did-usb\x2dGeneric\x2d_SM_xD_SD_MMC_MS_20060413092100000\x2d0:1.device loaded active plugged SM_xD_SD_MMC_MS
dev-disk-by\x2did-wwn\x2d0x5000c5001ee24a16.device loaded active plugged ST3750528AS
dev-disk-by\x2did-wwn\x2d0x5000c5001ee24a16\x2dpart1.device loaded active plugged ST3750528AS
dev-disk-by\x2dpath-pci\x2d0000:00:02.1\x2dusb\x2d0:3:1.0\x2dscsi\x2d0:0:0:0.device loaded active plugged Compact_Flash
dev-disk-by\x2dpath-pci\x2d0000:00:02.1\x2dusb\x2d0:3:1.0\x2dscsi\x2d0:0:0:1.device loaded active plugged SM_xD_SD_MMC_MS
dev-disk-by\x2duuid-c6112460\x2d8046\x2d417c\x2d99f7\x2dcac834347cfd.device loaded active plugged ST3750528AS
dev-sda.device loaded active plugged ST3750528AS
dev-sda1.device loaded active plugged ST3750528AS
dev-sdb.device loaded active plugged Compact_Flash
dev-sdc.device loaded active plugged SM_xD_SD_MMC_MS
dev-sr0.device loaded active plugged ATAPI_DVD_A_DH16AASH
dev-ttyS0.device loaded active plugged /dev/ttyS0
dev-ttyS1.device loaded active plugged /dev/ttyS1
dev-ttyS2.device loaded active plugged /dev/ttyS2
dev-ttyS3.device loaded active plugged /dev/ttyS3
sys-devices-pci0000:00-0000:00:02.1-usb3-3\x2d3-3\x2d3:1.0-host8-target8:0:0-8:0:0:0-block-sdb.device loaded active plugged Compact_Flash
sys-devices-pci0000:00-0000:00:02.1-usb3-3\x2d3-3\x2d3:1.0-host8-target8:0:0-8:0:0:1-block-sdc.device loaded active plugged SM_xD_SD_MMC_MS
sys-devices-pci0000:00-0000:00:04.1-usb4-4\x2d2-4\x2d2:1.0-net-wlan0.device loaded active plugged RTL8188CUS 802.11n WLAN Adapter
sys-devices-pci0000:00-0000:00:07.0-sound-card0.device loaded active plugged MCP72XE/MCP72P/MCP78U/MCP78S High Definition Audio
sys-devices-pci0000:00-0000:00:09.0-ata4-host3-target3:0:0-3:0:0:0-block-sda-sda1.device loaded active plugged ST3750528AS
sys-devices-pci0000:00-0000:00:09.0-ata4-host3-target3:0:0-3:0:0:0-block-sda.device loaded active plugged ST3750528AS
sys-devices-pci0000:00-0000:00:09.0-ata5-host4-target4:0:0-4:0:0:0-block-sr0.device loaded active plugged ATAPI_DVD_A_DH16AASH
sys-devices-pci0000:00-0000:00:0a.0-net-eth0.device loaded active plugged MCP77 Ethernet
sys-devices-platform-serial8250-tty-ttyS0.device loaded active plugged /sys/devices/platform/serial8250/tty/ttyS0
sys-devices-platform-serial8250-tty-ttyS1.device loaded active plugged /sys/devices/platform/serial8250/tty/ttyS1
sys-devices-platform-serial8250-tty-ttyS2.device loaded active plugged /sys/devices/platform/serial8250/tty/ttyS2
sys-devices-platform-serial8250-tty-ttyS3.device loaded active plugged /sys/devices/platform/serial8250/tty/ttyS3
sys-module-configfs.device loaded active plugged /sys/module/configfs
sys-subsystem-net-devices-eth0.device loaded active plugged MCP77 Ethernet
sys-subsystem-net-devices-wlan0.device loaded active plugged RTL8188CUS 802.11n WLAN Adapter
-.mount loaded active mounted /
dev-hugepages.mount loaded active mounted Huge Pages File System
dev-mqueue.mount loaded active mounted POSIX Message Queue File System
proc-sys-fs-binfmt_misc.mount loaded inactive dead Arbitrary Executable File Formats File System
sys-fs-fuse-connections.mount loaded inactive dead FUSE Control File System
sys-kernel-config.mount loaded active mounted Configuration File System
sys-kernel-debug.mount loaded active mounted Debug File System
tmp.mount loaded active mounted Temporary Directory
systemd-ask-password-console.path loaded active waiting Dispatch Password Requests to Console Directory Watch
systemd-ask-password-wall.path loaded active waiting Forward Password Requests to Wall Directory Watch
session-1.scope loaded active running Session 1 of user xxx
session-5.scope loaded active running Session 5 of user xxx
alsa-restore.service loaded inactive dead Restore Sound Card State
alsa-state.service loaded inactive dead Manage Sound Card State (restore and store)
alsa-store.service loaded inactive dead Store Sound Card State
auditd.service not-found inactive dead auditd.service
dbus.service loaded active running D-Bus System Message Bus
display-manager.service not-found inactive dead display-manager.service
dmeventd.service loaded inactive dead Device-mapper event daemon
emergency.service loaded inactive dead Emergency Shell
getty@tty1.service loaded active running Getty on tty1
kmod-static-nodes.service loaded active exited Create list of required static device nodes for the current kernel
lvmetad.service loaded inactive dead LVM2 metadata daemon
mkinitcpio-generate-shutdown-ramfs.service loaded inactive dead Generate shutdown-ramfs
netctl.service loaded inactive dead (Re)store the netctl profile state
netctl@ddwrt.service loaded active exited Networking for netctl profile ddwrt
plymouth-quit-wait.service not-found inactive dead plymouth-quit-wait.service
plymouth-start.service not-found inactive dead plymouth-start.service
rescue.service loaded inactive dead Rescue Shell
sshd.service loaded active running OpenSSH Daemon
sshdgenkeys.service loaded inactive dead SSH Key Generation
syslog.service not-found inactive dead syslog.service
systemd-ask-password-console.service loaded inactive dead Dispatch Password Requests to Console
systemd-ask-password-wall.service loaded inactive dead Forward Password Requests to Wall
systemd-binfmt.service loaded inactive dead Set Up Additional Binary Formats
systemd-fsck-root.service loaded inactive dead File System Check on Root Device
systemd-initctl.service loaded inactive dead /dev/initctl Compatibility Daemon
systemd-journal-flush.service loaded inactive dead Trigger Flushing of Journal to Persistent Storage
systemd-journald.service loaded active running Journal Service
systemd-logind.service loaded active running Login Service
systemd-modules-load.service loaded inactive dead Load Kernel Modules
systemd-random-seed.service loaded active exited Load/Save Random Seed
systemd-readahead-collect.service loaded inactive dead Collect Read-Ahead Data
systemd-readahead-done.service loaded inactive dead Stop Read-Ahead Data Collection
systemd-readahead-replay.service loaded inactive dead Replay Read-Ahead Data
systemd-remount-fs.service loaded active exited Remount Root and Kernel File Systems
systemd-shutdownd.service loaded inactive dead Delayed Shutdown Service
systemd-sysctl.service loaded active exited Apply Kernel Variables
systemd-tmpfiles-clean.service loaded inactive dead Cleanup of Temporary Directories
systemd-tmpfiles-setup-dev.service loaded active exited Create static device nodes in /dev
systemd-tmpfiles-setup.service loaded active exited Recreate Volatile Files and Directories
systemd-udev-trigger.service loaded active exited udev Coldplug all Devices
systemd-udevd.service loaded active running udev Kernel Device Manager
systemd-update-utmp.service loaded active exited Update UTMP about System Reboot/Shutdown
systemd-user-sessions.service loaded active exited Permit User Sessions
systemd-vconsole-setup.service loaded active exited Setup Virtual Console
user@1000.service loaded active running User Manager for 1000
-.slice loaded active active Root Slice
system-getty.slice loaded active active system-getty.slice
system-netctl.slice loaded active active system-netctl.slice
system.slice loaded active active System Slice
user-1000.slice loaded active active user-1000.slice
user.slice loaded active active User and Session Slice
dbus.socket loaded active running D-Bus System Message Bus Socket
dmeventd.socket loaded active listening Device-mapper event daemon FIFOs
lvmetad.socket loaded active listening LVM2 metadata daemon socket
syslog.socket loaded inactive dead Syslog Socket
systemd-initctl.socket loaded active listening /dev/initctl Compatibility Named Pipe
systemd-journald.socket loaded active running Journal Socket
systemd-shutdownd.socket loaded active listening Delayed Shutdown Socket
systemd-udevd-control.socket loaded active running udev Control Socket
systemd-udevd-kernel.socket loaded active running udev Kernel Socket
basic.target loaded active active Basic System
cryptsetup.target loaded active active Encrypted Volumes
emergency.target loaded inactive dead Emergency Mode
getty.target loaded active active Login Prompts
graphical.target loaded active active Graphical Interface
local-fs-pre.target loaded active active Local File Systems (Pre)
local-fs.target loaded active active Local File Systems
multi-user.target loaded active active Multi-User System
network.target loaded active active Network
nss-user-lookup.target loaded inactive dead User and Group Name Lookups
paths.target loaded active active Paths
remote-fs-pre.target loaded inactive dead Remote File Systems (Pre)
remote-fs.target loaded active active Remote File Systems
rescue.target loaded inactive dead Rescue Mode
shutdown.target loaded inactive dead Shutdown
slices.target loaded active active Slices
sockets.target loaded active active Sockets
sound.target loaded active active Sound Card
swap.target loaded active active Swap
sysinit.target loaded active active System Initialization
syslog.target not-found inactive dead syslog.target
timers.target loaded active active Timers
umount.target loaded inactive dead Unmount All Filesystems
systemd-readahead-done.timer loaded inactive dead Stop Read-Ahead Data Collection 10s After Completed Startup
systemd-tmpfiles-clean.timer loaded active waiting Daily Cleanup of Temporary DirectoriesAs far as services I have enabled, the only ones in `/etc/systemd/system/` are:
[@sigma ~]$ cd /etc/systemd/system/
[@sigma system]$ find .
.
./getty.target.wants
./getty.target.wants/getty@tty1.service
./multi-user.target.wants
./multi-user.target.wants/sshd.service
./multi-user.target.wants/remote-fs.targetLast edited by beetlejuice7 (2014-01-23 23:05:30)
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#4 2014-01-23 23:21:58
- ewaller
- Administrator
- From: Pasadena, CA
- Registered: 2009-07-13
- Posts: 20,354
Re: Wireless slowly stops working after successful connection
I don't think there is anything wrong there. All I saw was the netctl service. What is the netctl@ddwrt service? I assume that is your router, but it is an odd name for the service. Usually it would be names after the interface.
What is the output of ip link and of iw dev
Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
Sometimes it is the people no one can imagine anything of who do the things no one can imagine. -- Alan Turing
---
How to Ask Questions the Smart Way
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#5 2014-01-24 00:53:21
- WonderWoofy
- Member
- From: Los Gatos, CA
- Registered: 2012-05-19
- Posts: 8,414
Re: Wireless slowly stops working after successful connection
@ewaller, the netctl.service stores and restores the network state, while the netctl@.service is used to start a specific profile. So ddwrt is not necessarily the name of the OP's network, but rather it is the name of the actual netctl profile. Thus, he/she has a config at /etc/netctl/ddwrt.
@OP, I think you should stop and disable all netctl stuffs for now (and any other potential netowrk management tool), and then try to use the networking tools directly. So use wpa_supplicant to associate with the AP (use wpa_passphrase to make a wpa_supplicant.conf if necessary). Then use either dhcpcd or dhclient directly on the interface in question. Take not of any output, particularly if it is throwing any errors, and then post them here.
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#6 2014-01-24 02:02:31
- beetlejuice7
- Member
- Registered: 2012-02-28
- Posts: 49
Re: Wireless slowly stops working after successful connection
Well, I am baffled... I think it might be a kernel issue or software version problem. The arch install disk wireless works flawlessly (using wifi-menu). As soon as I install arch (I reinstalled) the wifi goes back to being flaky.
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#7 2014-01-24 03:32:14
- ewaller
- Administrator
- From: Pasadena, CA
- Registered: 2009-07-13
- Posts: 20,354
Re: Wireless slowly stops working after successful connection
@ewaller, the netctl.service stores and restores the network state, while the netctl@.service is used to start a specific profile. So ddwrt is not necessarily the name of the OP's network, but rather it is the name of the actual netctl profile. Thus, he/she has a config at /etc/netctl/ddwrt..
Makes sense. I am not using netctl right now (I like wicd). When I was using it, my profiles were named after my interface names -- I guess I forgot that was a conscience decision on my part.
Maybe if the OP were to say his Arch member name three times .... 
Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
Sometimes it is the people no one can imagine anything of who do the things no one can imagine. -- Alan Turing
---
How to Ask Questions the Smart Way
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#8 2014-01-24 03:33:43
- beetlejuice7
- Member
- Registered: 2012-02-28
- Posts: 49
Re: Wireless slowly stops working after successful connection
> Maybe if the OP were to say his Arch member name three times
Ha! Well thanks for the suggestions, I'll update if I find anything new.
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#9 2014-02-03 17:04:02
- amckee
- Member
- From: Cruise Ship Earth
- Registered: 2012-02-13
- Posts: 25
- Website
Re: Wireless slowly stops working after successful connection
I've been experiencing this myself with a similar chipset to yours. I have the rtl8192ce card, and can watch downloads drop to 30k, even over LAN. What I've found so far is that your chipset probably suffers from the same bug mine does, which I haven't been able to find a fix for. One popular thing that seemed to at least help a lucky few was to disable a few driver features. Mine is here in full, adjust yours accordingly:
$> cat /etc/modprobe.d/rtl8192ce.conf
# Disable Powersaving
options rtl8192ce ips=0
# i hear this one causes bugs
options rtl8192ce fwlps=0
# hoping this will log better details
options rtl8192ce debug=2
# Use software control
options rtl8192ce swenc=1Others resolved this by getting a new wifi card.
One thing I found in my particular setup was a service running every few minutes that seemed to be running a network service restart, causing it act dropped out as it reconnected. I found this through journalctl, so check there for clues as well. I just disabled the problematic service and it got much better immediately.
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#10 2014-02-03 17:10:35
- beetlejuice7
- Member
- Registered: 2012-02-28
- Posts: 49
Re: Wireless slowly stops working after successful connection
Wow thank you for posting here! I will give your changes a try.
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#11 2014-02-03 17:34:34
- WonderWoofy
- Member
- From: Los Gatos, CA
- Registered: 2012-05-19
- Posts: 8,414
Re: Wireless slowly stops working after successful connection
I also had this rtl8192ce card like amckee. It was the biggest steaming pile of crap I have ever experienced. My machine is a Thinkpad, so the cards are whitelisted by a Field Replaceable Unit number. I had two other options of cards that I could get for my particular machine. So after much searching on ebay, I was able to find one, and then I found the other. The one I use is a Broadcom, and I never thought that I would be so happy to have a Broadcom card...
From watching realtek's contributions to the kernel, it seems as though they write up a driver, then never revisit it for improvement later. If it is crappy to start, that is how it seems to stay.
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#12 2014-02-04 00:24:11
- beetlejuice7
- Member
- Registered: 2012-02-28
- Posts: 49
Re: Wireless slowly stops working after successful connection
amckee -- can you link to any other posts you've found on the topic?
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#13 2014-02-04 00:28:54
- beetlejuice7
- Member
- Registered: 2012-02-28
- Posts: 49
Re: Wireless slowly stops working after successful connection
For what it's worth, I tried the changes you suggested and had no luck 
... Thanks for the help, though.
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#14 2014-02-04 23:54:36
- amckee
- Member
- From: Cruise Ship Earth
- Registered: 2012-02-13
- Posts: 25
- Website
Re: Wireless slowly stops working after successful connection
A neat discussion on the drivers:
https://bbs.archlinux.org/viewtopic.php?id=134548
Bug report with Red Hat from a few years ago. It's been closed, but still seems relevant:
https://bugzilla.redhat.com/show_bug.cgi?id=770207
This time around I actually read through the bug report, and found a new trick:
"both pc's worked fine with the router turned from ng mode to n mode only, connecting at 177mb/s +, and its been running for a few hours now with no issues"
I may try that soon.
Other posts on this subject:
http://ubuntuforums.org/showthread.php?t=1886838
http://ubuntuforums.org/showthread.php?t=1981968
https://bbs.archlinux.org/viewtopic.php?id=176589
https://bbs.archlinux.org/viewtopic.php?id=176057
https://bbs.archlinux.org/viewtopic.php?id=174727
There are more, but a search for 'realtek wifi' on the Arch forums brings up a nice sized list.
edit: typo/grammar/clarity
Last edited by amckee (2014-02-04 23:55:58)
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#15 2014-02-21 18:08:03
- amckee
- Member
- From: Cruise Ship Earth
- Registered: 2012-02-13
- Posts: 25
- Website
Re: Wireless slowly stops working after successful connection
I may have found my solution, hopefully it works for y'all as well. From Nomadic's comment at:
http://askubuntu.com/questions/95360/ho … novo-x121e
I disabled 802.11n completely on my router and my wifi issues are really, really better. Quite possibly resolved as my throughput has doubled, and I've only seen the connection drop to 1.5MB/s (as opposed to the 30KB/s from before) before bouncing back to about 5.5MB/s
It's worth a try
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#16 2014-02-22 19:40:28
- gsgleason
- Member
- Registered: 2012-10-08
- Posts: 71
Re: Wireless slowly stops working after successful connection
The native rtl8192 module is broken and stops working after short amount of inactivity.
A continuous ping somewhere keeps it working. I have an 8192cu usb card and installed the dkms-8192cu package from aur which uses the latest realtek driver and now it works a lot better.
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#17 2014-02-22 19:42:47
- beetlejuice7
- Member
- Registered: 2012-02-28
- Posts: 49
Re: Wireless slowly stops working after successful connection
Good to know. I've got the 8188 on my desktop, but I also have a thinkpad with the 8191SEvB (rtl8192 module). After the drama with the 8188 I've been avoiding upgrading the packages on my thinkpad until things get sorted out.
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#18 2014-02-23 16:52:03
- gsgleason
- Member
- Registered: 2012-10-08
- Posts: 71
Re: Wireless slowly stops working after successful connection
I mean you can use it for your 8188cus
The AUR package says:
Description: Driver for Realtek RTL8188CUS (8188C, 8192C) chipset wireless cards
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