fedora 15 internet unstable

[aljoge]

I bought a new computer. Fedora internet connection is very unstable, while windows 7 is running smoothly. When booting fedora and firefox internet works. But after a few minutes or seconds the connection breaks. I have no idea what to do. Help is needed.

My computer specs:

modem/router: fritzbox for WLAN 7170 (wired connection)
Intel core i5 2500k 3.3 GHz
XFX Radeon HD 6790 1 GB
Gigabyte GA-Z68AP-D3 (rev 1.0)

Fedora version: 64 bit. (installed from live version)

[David Batson]

I have a similar problem using my Sierra Wireless 890 AirCard (cellular modem) in Fedora 15 Gnome. If I leave the computer for a few minutes, Network Manager says I am still connected, but I have no internet connectivity. I did not have this problem in Fedora 14 - albeit with a different laptop and differerent Sierra Wireless 881 AirCard.

I can't reestablish the connection without shutting the computer completely down. Even a restart doesn't work because my card is not turned off by Fedora. If I restart and boot into Mageia, I cannot make a connection, but if I shutdown, then power the laptop back on and boot into Mageia I can make a connection.

I see others posting similar problems. I believe Network Manager is not yet ready for Prime Time. If you use KDE, kppp should work well - that's what I use in Mageia. Not sure what Gnome has to offer. I know I am not going back to wvdial. Too primitive for me.

[aljoge]

I hope to get some help in this case, because it looks that internetconnectivity is unstable in ubuntu too. Without internet linux is useless.

[David Batson]

Internet is stable for me in Mageia 1 (KDE) using kppp. Haven't tried the Gnome version of Mageia.

http://www.mageia.org/en/1/

http://www.mageia.org/en/downloads/

[prat22]

I had similar problems too with mobile broadband. However, yesterday an update has put it right!

For wired connection, I have figured out that you need to create a new wired connection/DSL connection, and connect through it, instead of connecting automatically. This works fine with me.

May be this is a bug, and we are waiting for the fixes.

[David Batson]

Yesterday's update didn't help me. I finally broke down and filed a bug report.
https://bugzilla.redhat.com/show_bug.cgi?id=725198

[JohnVV]

aljoge
is ipv6 support enabled ?
right now almost no one is using ipv6 yet
fedora and firefox both do a ipv6 dns look up FIRST then that times out and then dose a ipv4 look up

that might be your problem

[prat22]

Originally Posted by David Batson

Yesterday's update didn't help me. I finally broke down and filed a bug report.
https://bugzilla.redhat.com/show_bug.cgi?id=725198

It was for mobile broadband. 241Kb.

Did you try to make a new connection?

[David Batson]

I did not create a new mobile broadband (3G) connection with nm-connection-editor, but I don't connect automatically either.

[aljoge]

Originally Posted by JohnVV

aljoge
is ipv6 support enabled ?
right now almost no one is using ipv6 yet
fedora and firefox both do a ipv6 dns look up FIRST then that times out and then dose a ipv4 look up

that might be your problem

yes, I disabled IPv6. However I don't know if I did it the correct way. (via the network settings)

[aljoge]

connectivity is still a problem and don't know it anymore. Please comment.

what I did:

create a new file /etc/modprobe.d/ipv6

file ipv6 contains: install ipv6 /bin/true

" lsmod | grep ipv6" shows that ipv6 is not active anymore.

however: connection is still crappy. My lspci output:

00:00.0 Host bridge: Intel Corporation Sandy Bridge DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Sandy Bridge PCI Express Root Port (rev 09)
00:16.0 Communication controller: Intel Corporation Cougar Point HECI Controller #1 (rev 04)
00:1a.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #2 (rev 05)
00:1b.0 Audio device: Intel Corporation Cougar Point High Definition Audio Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 1 (rev b5)
00:1c.1 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 2 (rev b5)
00:1c.2 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 3 (rev b5)
00:1c.3 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 4 (rev b5)
00:1d.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #1 (rev 05)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev a5)
00:1f.0 ISA bridge: Intel Corporation Cougar Point LPC Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation Cougar Point 6 port SATA AHCI Controller (rev 05)
00:1f.3 SMBus: Intel Corporation Cougar Point SMBus Controller (rev 05)
01:00.0 VGA compatible controller: ATI Technologies Inc Device 673e
01:00.1 Audio device: ATI Technologies Inc Device aa88
03:00.0 USB Controller: Device 1b6f:7023 (rev 01)
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)
05:00.0 PCI bridge: Integrated Technology Express, Inc. Device 8892 (rev 10)

[lucifer663]

i was facing random disconnection of wifi on F15. someone advised me to disable network manager and use wicd instead. it worked like charm.

[aljoge]

tried it. sadly wicd is not totally not working. disabled network manager and enabled wicd.

[aljoge]

I now totally removes NetworkManager by typing: yum remove NetworkManager, so only wicd is active. However the result is the same: internet for a very short time.

So it is not NetworkManager and it is not the Ipv6.

I have two failures that showed up.

1. sometimes when starting wicd I got the comment about D-bus interface failure
2. When sometimes starting up a live cd I get a message of MSI X failure.

Can there be the problem?

[JohnVV]

something is very messed up
at this point
Reinstall fedora 15 from the install dvd
http://fedoraproject.org/en/get-fedora-all
"torrent 32 bit"
http://torrent.fedoraproject.org/tor...86-DVD.torrent

fedora uses "networkManager" by default ( the older "Network" is there for legacy reasons, but is turned off )