# Unstable wifi network connection **URL:** \ **Category:** SLED Networking\ **Created:** [February 29, 2012, 4:59pm UTC](https://forums.suse.com/t/unstable-wifi-network-connection/22283 "2012-02-29T16:59:06Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![AlexDudko](https://avatars.discourse-cdn.com/v4/letter/a/8797f3/32.png) [@AlexDudko](https://forums.suse.com/u/AlexDudko)\ **Post date:** [February 29, 2012, 4:59pm UTC](https://forums.suse.com/t/unstable-wifi-network-connection/22283/1 "2012-02-29T16:59:06Z")
I noticed that a network connection through a wifi router is unstable. It started after some recent updates had been installed. For some time connection is lost then it appears again. The router itself is reachable and remote DNS server as well. But I can’t load any webpage. Sometimes it’s possible to connect though ftp protocol but not http. If I reconnect network is working for some time again. Here’s a system log from the period of time when the connection is lost: [QUOTE]Feb 29 16:10:26 alex kernel: [9213.060094] Scan in 40M, force to 20M first:3, 1 Feb 29 16:10:27 alex kernel: [9214.520074] Scan in 20M, back to 40M Feb 29 16:10:27 alex kernel: [9214.530071] ===\>rtl8192se\_link\_change():ieee-\>iw\_mode is 2 Feb 29 16:10:27 alex kernel: [9214.530076] rtl8192\_update\_cap(): WLAN\_CAPABILITY\_SHORT\_PREAMBLE Feb 29 16:10:34 alex kernel: [9221.872059] SetHwReg8192SE():HW\_VAR\_AC\_PARAM eACI:0:a42b Feb 29 16:10:42 alex kernel: [9229.871812] SetHwReg8192SE():HW\_VAR\_AC\_PARAM eACI:0:a42b Feb 29 16:10:48 alex kernel: [9235.871383] SetHwReg8192SE():HW\_VAR\_AC\_PARAM eACI:0:a42b Feb 29 16:11:06 alex kernel: [9253.003305] ===\>rtl8192se\_link\_change():ieee-\>iw\_mode is 2 Feb 29 16:11:06 alex kernel: [9253.056590] Scan in 40M, force to 20M first:3, 1 Feb 29 16:11:07 alex kernel: [9254.516592] Scan in 20M, back to 40M Feb 29 16:11:07 alex kernel: [9254.526600] ===\>rtl8192se\_link\_change():ieee-\>iw\_mode is 2 Feb 29 16:11:07 alex kernel: [9254.526606] rtl8192\_update\_cap(): WLAN\_CAPABILITY\_SHORT\_PREAMBLE Feb 29 16:11:10 alex kernel: [9257.871436] SetHwReg8192SE():HW\_VAR\_AC\_PARAM eACI:0:a42b Feb 29 16:11:14 alex kernel: [9261.871836] SetHwReg8192SE():HW\_VAR\_AC\_PARAM eACI:0:a42b Feb 29 16:11:30 alex kernel: [9277.871312] SetHwReg8192SE():HW\_VAR\_AC\_PARAM eACI:0:a42b Feb 29 16:11:46 alex kernel: [9293.871836] SetHwReg8192SE():HW\_VAR\_AC\_PARAM eACI:0:a42b Feb 29 16:12:06 alex kernel: [9313.002945] ===\>rtl8192se\_link\_change():ieee-\>iw\_mode is 2 Feb 29 16:12:06 alex kernel: [9313.056071] Scan in 40M, force to 20M first:3, 1 Feb 29 16:12:07 alex kernel: [9314.512081] Scan in 20M, back to 40M Feb 29 16:12:07 alex kernel: [9314.522080] ===\>rtl8192se\_link\_change():ieee-\>iw\_mode is 2 Feb 29 16:12:07 alex kernel: [9314.522085] rtl8192\_update\_cap(): WLAN\_CAPABILITY\_SHORT\_PREAMBLE Feb 29 16:12:13 alex kernel: [9320.176757] RX: IEEE802.1X EAPOL frame! Feb 29 16:12:13 alex kernel: [9320.176904] alg name:CCMP Feb 29 16:12:13 alex kernel: [9320.176921] ===========\>set\_swcam():EntryNo is 2,KeyIndex is 2,KeyType is 4,is\_mesh is 0 Feb 29 16:12:28 alex kernel: [9335.615175] rtllib\_rx\_decrypt: decrypt frame error[/QUOTE] ---
**Author:** ![system](https://us1.discourse-cdn.com/flex022/uploads/suse/original/2X/5/5012ba89e3ffb5220dac47d5ea0ba032e2fe1cb6.png) [@system](https://forums.suse.com/u/system)\ **Post date:** [March 8, 2012, 3:30pm UTC](https://forums.suse.com/t/unstable-wifi-network-connection/22283/2 "2012-03-08T15:30:16Z")
AlexDudko, It appears that in the past few days you have not received a response to your posting. That concerns us, and has triggered this automated reply. Has your issue been resolved? If not, you might try one of the following options: - Visit [http://www.suse.com/support](http://www.suse.com/support) and search the knowledgebase and/or check all the other support options available. - You could also try posting your message again. Make sure it is posted in the correct newsgroup. ([http://forums.suse.com](http://forums.suse.com)) Be sure to read the forum FAQ about what to expect in the way of responses: [http://forums.suse.com/faq.php](http://forums.suse.com/faq.php) If this is a reply to a duplicate posting, please ignore and accept our apologies and rest assured we will issue a stern reprimand to our posting bot. Good luck! Your SUSE Forums Team [http://forums.suse.com](http://forums.suse.com) ---
**Author:** ![malcolmlewis](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/malcolmlewis/32/11375_2.png) [@malcolmlewis](https://forums.suse.com/u/malcolmlewis)\ **Post date:** [March 8, 2012, 3:54pm UTC](https://forums.suse.com/t/unstable-wifi-network-connection/22283/3 "2012-03-08T15:54:21Z")
> [@AlexDudko](#): > > I noticed that a network connection through a wifi router is unstable. > It started after some recent updates had been installed. For some time > connection is lost then it appears again. The router itself is reachable > and remote DNS server as well. But I can’t load any webpage. Sometimes > it’s possible to connect though ftp protocol but not http. If I > reconnect network is working for some time again. > Here’s a system log from the period of time when the connection is > lost:[color=blue] > > > Feb 29 16:10:26 alex kernel: [9213.060094] Scan in 40M, force to 20M > > first:3, 1 > > Feb 29 16:10:27 alex kernel: [9214.520074] Scan in 20M, back to 40M > > Feb 29 16:10:27 alex kernel: [9214.530071] > > ===\>rtl8192se\_link\_change():ieee-\>iw\_mode is 2 > > Feb 29 16:10:27 alex kernel: [9214.530076] rtl8192\_update\_cap(): > > WLAN\_CAPABILITY\_SHORT\_PREAMBLE > > Feb 29 16:10:34 alex kernel: [9221.872059] > > SetHwReg8192SE():HW\_VAR\_AC\_PARAM eACI:0:a42b > > Feb 29 16:10:42 alex kernel: [9229.871812] > > SetHwReg8192SE():HW\_VAR\_AC\_PARAM eACI:0:a42b > > Feb 29 16:10:48 alex kernel: [9235.871383] > > SetHwReg8192SE():HW\_VAR\_AC\_PARAM eACI:0:a42b > > Feb 29 16:11:06 alex kernel: [9253.003305] > > ===\>rtl8192se\_link\_change():ieee-\>iw\_mode is 2 > > Feb 29 16:11:06 alex kernel: [9253.056590] Scan in 40M, force to 20M > > first:3, 1 > > Feb 29 16:11:07 alex kernel: [9254.516592] Scan in 20M, back to 40M > > Feb 29 16:11:07 alex kernel: [9254.526600] > > ===\>rtl8192se\_link\_change():ieee-\>iw\_mode is 2 > > Feb 29 16:11:07 alex kernel: [9254.526606] rtl8192\_update\_cap(): > > WLAN\_CAPABILITY\_SHORT\_PREAMBLE > > Feb 29 16:11:10 alex kernel: [9257.871436] > > SetHwReg8192SE():HW\_VAR\_AC\_PARAM eACI:0:a42b > > Feb 29 16:11:14 alex kernel: [9261.871836] > > SetHwReg8192SE():HW\_VAR\_AC\_PARAM eACI:0:a42b > > Feb 29 16:11:30 alex kernel: [9277.871312] > > SetHwReg8192SE():HW\_VAR\_AC\_PARAM eACI:0:a42b > > Feb 29 16:11:46 alex kernel: [9293.871836] > > SetHwReg8192SE():HW\_VAR\_AC\_PARAM eACI:0:a42b > > Feb 29 16:12:06 alex kernel: [9313.002945] > > ===\>rtl8192se\_link\_change():ieee-\>iw\_mode is 2 > > Feb 29 16:12:06 alex kernel: [9313.056071] Scan in 40M, force to 20M > > first:3, 1 > > Feb 29 16:12:07 alex kernel: [9314.512081] Scan in 20M, back to 40M > > Feb 29 16:12:07 alex kernel: [9314.522080] > > ===\>rtl8192se\_link\_change():ieee-\>iw\_mode is 2 > > Feb 29 16:12:07 alex kernel: [9314.522085] rtl8192\_update\_cap(): > > WLAN\_CAPABILITY\_SHORT\_PREAMBLE > > Feb 29 16:12:13 alex kernel: [9320.176757] RX: IEEE802.1X EAPOL > > frame! > > Feb 29 16:12:13 alex kernel: [9320.176904] alg name:CCMP > > Feb 29 16:12:13 alex kernel: [9320.176921] > > ===========\>set\_swcam():EntryNo is 2,KeyIndex is 2,KeyType is > > 4,is\_mesh is 0 > > Feb 29 16:12:28 alex kernel: [9335.615175] rtllib\_rx\_decrypt: decrypt > > frame error[/color] Hi Are there many other wireless access points about, maybe on the same channel and causing interference? – Cheers Malcolm °¿° (Linux Counter #276890) SUSE Linux Enterprise Desktop 11 (x86\_64) Kernel 3.0.13-0.27-default up 1 day 10:15, 4 users, load average: 0.00, 0.01, 0.05 CPU Intel i5 CPU M520@2.40GHz | Intel Arrandale GPU ---
**Author:** ![AlexDudko](https://avatars.discourse-cdn.com/v4/letter/a/8797f3/32.png) [@AlexDudko](https://forums.suse.com/u/AlexDudko)\ **Post date:** [March 25, 2012, 10:23pm UTC](https://forums.suse.com/t/unstable-wifi-network-connection/22283/4 "2012-03-25T22:23:31Z")
[QUOTE=malcolmlewis;2914]Hi Are there many other wireless access points about, maybe on the same channel and causing interference? – Cheers Malcolm °¿° (Linux Counter #276890) SUSE Linux Enterprise Desktop 11 (x86\_64) Kernel 3.0.13-0.27-default up 1 day 10:15, 4 users, load average: 0.00, 0.01, 0.05 CPU Intel i5 CPU M520@2.40GHz | Intel Arrandale GPU[/QUOTE] No, there are none. There is no interference. I thought it had been solved by the upgrade to SP-2 but now I see this behaviour remains. If I connect from another computer or boot into another OS - everything is fine. If it happens System Monitor starts to show it downloads packages on a very high speed, though at the same time nethogs shows 0. This high speed is impossible because it exceeds the limits, set by the provider.