* [ath9k-devel] About the video problem of ath9k_htc
@ 2010-08-21 6:53 LvEric
2010-08-21 11:41 ` Peter Stuge
` (3 more replies)
0 siblings, 4 replies; 16+ messages in thread
From: LvEric @ 2010-08-21 6:53 UTC (permalink / raw)
To: ath9k-devel
Hi All,
I am using the ath9k_htc driver for TL -WN721N on my Linux Set top box.
after insmod all moudles, plugin the TL-WN721N ,and run "wlist wlan0 scan",
It can works,but the video output became sharking when scaning, when it finish the scaning,
the video back to normal. why? This driver oprate some video output? Or something is same as the video driver?
Any body known what is the reason of this?
Thanks.
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^ permalink raw reply [flat|nested] 16+ messages in thread* [ath9k-devel] About the video problem of ath9k_htc 2010-08-21 6:53 [ath9k-devel] About the video problem of ath9k_htc LvEric @ 2010-08-21 11:41 ` Peter Stuge 2010-08-21 13:23 ` Helmut Schaa ` (2 subsequent siblings) 3 siblings, 0 replies; 16+ messages in thread From: Peter Stuge @ 2010-08-21 11:41 UTC (permalink / raw) To: ath9k-devel LvEric wrote: > but the video output became sharking when scaning, when it finish > the scaning the video back to normal. why? It sounds like a signal integrity issue in the set top box; ie. a hardware bug in the highlevel product. But it's impossible to diagnose further without more information. I suggest that you look for some experts with experience from the particular set top box product you're using. //Peter ^ permalink raw reply [flat|nested] 16+ messages in thread
* [ath9k-devel] About the video problem of ath9k_htc 2010-08-21 6:53 [ath9k-devel] About the video problem of ath9k_htc LvEric 2010-08-21 11:41 ` Peter Stuge @ 2010-08-21 13:23 ` Helmut Schaa 2010-08-22 6:22 ` LvEric 2010-08-22 7:53 ` LvEric 2010-08-23 3:25 ` Senthilkumar Balasubramanian 2010-08-27 5:14 ` Alan 3 siblings, 2 replies; 16+ messages in thread From: Helmut Schaa @ 2010-08-21 13:23 UTC (permalink / raw) To: ath9k-devel Hi, Am Saturday 21 August 2010 schrieb LvEric: > I am using the ath9k_htc driver for TL -WN721N on my Linux Set top box. > > after insmod all moudles, plugin the TL-WN721N ,and run "wlist wlan0 scan", > > It can works,but the video output became sharking when scaning, when it finish the scaning, > > the video back to normal. why? This driver oprate some video output? Or something is same as the video driver? > > Any body known what is the reason of this? One possible explanation would be because the scanning involves changing the channel and as a result the wifi card cannot exchange data with the AP during that time (I just assume your set top box is configured as wireless STA and associates with an AP since otherwise you wouldn't need to scan). However, the software scan implementation in mac80211 uses the configured qos requiremenets to determine how many channels to scan at once. In order to reduce the average latency at the cost of a longer wireless scan duration you can use something like the attached python script (this will set the qos latency to 300ms while running, however not sure if the script is still up to date). This should advise mac80211 to not leave the operating channel for longer periods of time than 300ms (or by a different value you put in there). And one more thing: the scan implementation in mac80211 does not respect DTIM beacons at all and thus won't work nicely with mutli- and boradcast traffic at all. Not sure if that applies to your issue. HTH, Helmut -------------- next part -------------- A non-text attachment was scrubbed... Name: set_network_latency.py Type: text/x-python Size: 230 bytes Desc: not available Url : http://lists.ath9k.org/pipermail/ath9k-devel/attachments/20100821/66818d15/attachment.py ^ permalink raw reply [flat|nested] 16+ messages in thread
* [ath9k-devel] About the video problem of ath9k_htc 2010-08-21 13:23 ` Helmut Schaa @ 2010-08-22 6:22 ` LvEric 2010-08-22 9:59 ` Helmut Schaa 2010-08-22 7:53 ` LvEric 1 sibling, 1 reply; 16+ messages in thread From: LvEric @ 2010-08-22 6:22 UTC (permalink / raw) To: ath9k-devel Hi Helmut Very thanks for your replay. It seems not only scaning make the video shaking,also initialization when TL-WN721N plugin. And it seems that all time when TL-WN721N start to work, the video will shaking. yestoday,I add some printk in the during of initialization in ath9k_htc, and found the video became shaking near to eeprom start. and after that,video shaking when TL-WN721N is working,even "ifconfig wlan0 up" ,video will shake in short. Eric > From: helmut.schaa at googlemail.com > To: eric_lvjun at hotmail.com > Subject: Re: [ath9k-devel] About the video problem of ath9k_htc > Date: Sat, 21 Aug 2010 15:23:08 +0200 > CC: ath9k-devel at lists.ath9k.org > > Hi, > > Am Saturday 21 August 2010 schrieb LvEric: > > I am using the ath9k_htc driver for TL -WN721N on my Linux Set top box. > > > > after insmod all moudles, plugin the TL-WN721N ,and run "wlist wlan0 scan", > > > > It can works,but the video output became sharking when scaning, when it finish the scaning, > > > > the video back to normal. why? This driver oprate some video output? Or something is same as the video driver? > > > > Any body known what is the reason of this? > > One possible explanation would be because the scanning involves changing > the channel and as a result the wifi card cannot exchange data with the AP > during that time (I just assume your set top box is configured as wireless > STA and associates with an AP since otherwise you wouldn't need to scan). > > However, the software scan implementation in mac80211 uses the configured qos > requiremenets to determine how many channels to scan at once. In order to > reduce the average latency at the cost of a longer wireless scan duration you > can use something like the attached python script (this will set the qos > latency to 300ms while running, however not sure if the script is still up to > date). This should advise mac80211 to not leave the operating channel for > longer periods of time than 300ms (or by a different value you put in there). > > And one more thing: the scan implementation in mac80211 does not respect > DTIM beacons at all and thus won't work nicely with mutli- and boradcast > traffic at all. Not sure if that applies to your issue. > > HTH, > Helmut -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.ath9k.org/pipermail/ath9k-devel/attachments/20100822/7777e1fa/attachment.htm ^ permalink raw reply [flat|nested] 16+ messages in thread
* [ath9k-devel] About the video problem of ath9k_htc 2010-08-22 6:22 ` LvEric @ 2010-08-22 9:59 ` Helmut Schaa 0 siblings, 0 replies; 16+ messages in thread From: Helmut Schaa @ 2010-08-22 9:59 UTC (permalink / raw) To: ath9k-devel Am Sunday 22 August 2010 schrieb LvEric: > It seems not only scaning make the video shaking,also initialization when TL-WN721N plugin. > And it seems that all time when TL-WN721N start to work, the video will shaking. > > yestoday,I add some printk in the during of initialization in ath9k_htc, and found the video became shaking near to eeprom start. > and after that,video shaking when TL-WN721N is working,even "ifconfig wlan0 up" ,video will shake in short. Ok, I interpreted your mail as if you've got problems while streaming a video over wifi. But you're issue seems to be different. Hence, you can ignore my previous suggestion. Helmut > > From: helmut.schaa at googlemail.com > > To: eric_lvjun at hotmail.com > > Subject: Re: [ath9k-devel] About the video problem of ath9k_htc > > Date: Sat, 21 Aug 2010 15:23:08 +0200 > > CC: ath9k-devel at lists.ath9k.org > > > > Hi, > > > > Am Saturday 21 August 2010 schrieb LvEric: > > > I am using the ath9k_htc driver for TL -WN721N on my Linux Set top box. > > > > > > after insmod all moudles, plugin the TL-WN721N ,and run "wlist wlan0 scan", > > > > > > It can works,but the video output became sharking when scaning, when it finish the scaning, > > > > > > the video back to normal. why? This driver oprate some video output? Or something is same as the video driver? > > > > > > Any body known what is the reason of this? > > > > One possible explanation would be because the scanning involves changing > > the channel and as a result the wifi card cannot exchange data with the AP > > during that time (I just assume your set top box is configured as wireless > > STA and associates with an AP since otherwise you wouldn't need to scan). > > > > However, the software scan implementation in mac80211 uses the configured qos > > requiremenets to determine how many channels to scan at once. In order to > > reduce the average latency at the cost of a longer wireless scan duration you > > can use something like the attached python script (this will set the qos > > latency to 300ms while running, however not sure if the script is still up to > > date). This should advise mac80211 to not leave the operating channel for > > longer periods of time than 300ms (or by a different value you put in there). > > > > And one more thing: the scan implementation in mac80211 does not respect > > DTIM beacons at all and thus won't work nicely with mutli- and boradcast > > traffic at all. Not sure if that applies to your issue. > > > > HTH, > > Helmut > ^ permalink raw reply [flat|nested] 16+ messages in thread
* [ath9k-devel] About the video problem of ath9k_htc 2010-08-21 13:23 ` Helmut Schaa 2010-08-22 6:22 ` LvEric @ 2010-08-22 7:53 ` LvEric 1 sibling, 0 replies; 16+ messages in thread From: LvEric @ 2010-08-22 7:53 UTC (permalink / raw) To: ath9k-devel Hi Today,I check it with HDMI output.It works normal,have no Video problem with HDMI output. And find two problem: 1 :Video from AV output is shaking when TL-WN721N working. 2: It seems that when TL-WN721N working,the remote control can not working in normal,some time can not get the key,and some time get error key. What's the conceivable reason of these? TL-WN721N take much more resouce to run? I wish its hardware problem of my TL-WN721N. And when TL-WN721N is working, many information is outputing like the following, Could you get some information for them? Added BSSID 00:18:39:5d:94:4d into blacklist CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys wpa_driver_wext_set_key: alg=0 key_idx=0 set_tx=0 seq_len=0 key_len=0 RTM_NEWLINK: operstate=0 ifi_flags=0x1043 ([UP][RUNNING]) Wireless event: cmd=0x8b15 len=20 Wireless event: new AP: 00:00:00:00:00:00 WPA: 4-Way Handshake failed - pre-shared key may be incorrect Setting scan request: 0 sec 100000 usec Added BSSID 00:18:39:5d:94:4d into blacklist CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys wpa_driver_wext_set_key: alg=0 key_idx=0 set_tx=0 seq_len=0 key_len=0 RTM_NEWLINK: operstate=1 ifi_flags=0x1043 ([UP][RUNNING]) Wireless event: cmd=0x8b15 len=20 Wireless event: new AP: 00:00:00:00:00:00 Setting scan request: 0 sec 100000 usec Added BSSID 00:18:39:5d:94:4d into blacklist CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys wpa_driver_wext_set_key: alg=0 key_idx=0 set_tx=0 seq_len=0 key_len=0 cfg80211: Callinioctl[SIOCSIWMLME]: Invalid arg CRDA to update world regulatory domain gument wpa_driver_wext_set_key: alg=0 key_idx=1 set_tx=0 seq_len=0 key_len=0 wpa_driver_wext_set_key: alg=0 key_idx=2 set_tx=0 seq_len=0 key_len=0 wpa_driver_wext_set_key: alg=0 key_idx=3 set_tx=0 seq_len=0 key_len=0 wpa_driver_wext_set_key: alg=0 key_idx=0 set_tx=0 seq_len=0 key_len=0 State: 4WAY_HANDSHAKE -> DISCONNECTED wpa_driver_wext_set_operstate: operstate 0->0 (DORMANT) WEXT: Operstate: linkmode=-1, operstate=5 EAPOL: External notification - portEnabled=0 EAPOL: SUPP_PAE entering state DISCONNECTED EAPOL: SUPP_BE entering state INITIALIZE EAPOL: External notification - portValid=0 EAPOL: External notification - EAP success=0 RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan0' added State: DISCONNECTED -> SCANNING Starting AP scan (broadcast SSID) wpa_driver_wext_set_key: alg=0 key_idx=1 set_tx=0 seq_len=0 key_len=0 wpa_driver_wext_set_key: alg=0 key_idx=2 set_tx=0 seq_len=0 key_len=0 wpa_driver_wext_set_key: alg=0 key_idx=3 set_tx=0 seq_len=0 key_len=0 wpa_driver_wext_set_key: alg=0 key_idx=0 set_tx=0 seq_len=0 key_len=0 State: 4WAY_HANDSHAKE -> DISCONNECTED wpa_driver_wext_set_operstate: operstate 0->0 (DORMANT) WEXT: Operstate: linkmode=-1, operstate=5 EAPOL: External notification - portEnabled=0 EAPOL: SUPP_PAE entering state DISCONNECTED EAPOL: SUPP_BE entering state INITIALIZE EAPOL: External notification - portValid=0 EAPOL: External notification - EAP success=0 RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan0' added RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) Wireless event: cmd=0x8b1a len=40 wpa_driver_wext_set_key: alg=0 key_idx=1 set_tx=0 seq_len=0 key_len=0 wpa_driver_wext_set_key: alg=0 key_idx=2 set_tx=0 seq_len=0 key_len=0 wpa_driver_wext_set_key: alg=0 key_idx=3 set_tx=0 seq_len=0 key_len=0 wpa_driver_wext_set_key: alg=0 key_idx=0 set_tx=0 seq_len=0 key_len=0 State: COMPLETED -> DISCONNECTED wpa_driver_wext_set_operstate: operstate 1->0 (DORMANT) WEXT: Operstate: linkmode=-1, operstate=5 EAPOL: External notification - portEnabled=0 EAPOL: SUPP_PAE entering state DISCONNECTED EAPOL: SUPP_BE entering state INITIALIZE EAPOL: External notification - portValid=0 EAPOL: External notification - EAP success=0 RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan0' added RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) Wireless event: cmd=0x8b1a len=40 RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) Wireless event: cmd=0x8b1a len=40 State: DISCONNECTED -> SCANNING Starting AP scan (broadcast SSID) ioctl[SIOCSIWSCAN]: Device or resource busy Scan requested (ret=-1) - scan timeout 30 seconds Failed to initiate AP scan. Setting scan request: 10 sec 0 usec ioctl[SIOCSIWSCAN]: Device or resource busy Scan requested (ret=-1) - scan timeout 30 seconds Failed to initiate AP scan. Setting scan request: 10 sec 0 usec Authentication with 00:00:00:00:00:00 timed out. BSSID 00:00:00:00:00:00 blacklist count incremented to 2 No keys have been configured - skip key clearing State: SCANNING -> DISCONNECTED wpa_driver_wext_set_operstate: operstate 0->0 (DORMANT) WEXT: Operstate: linkmode=-1, operstate=5 EAPOL: External notification - portEnabled=0 EAPOL: External notification - portValid=0 EAPOL: External notification - EAP success=0 Setting scan request: 0 sec 0 usec RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) Wireless event: cmd=0x8b1a len=40 RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) Wireless event: cmd=0x8b1a len=40 State: DISCONNECTED -> SCANNING Starting AP scan (broadcast SSID) ioctl[SIOCSIWSCAN]: Device or resource busy State: DISCONNECTED -> SCANNING Starting AP scan (broadcast SSID) No keys have been configured - skip key clearing State: ASSOCIATED -> DISCONNECTED wpa_driver_wext_set_operstate: operstate 0->0 (DORMANT) WEXT: Operstate: linkmode=-1, operstate=5 EAPOL: External notification - portEnabled=0 EAPOL: SUPP_PAE entering state DISCONNECTED EAPOL: SUPP_BE entering state INITIALIZE Scan requested (ret=-1) - scan timeout 30 seconds Failed to initiate AP scan. Setting scan request: 10 sec 0 usec ioctl[SIOCSIWSCAN]: Device or resource busy Scan requested (ret=-1) - scan timeout 30 seconds Failed to initiate AP scan. Setting scan request: 10 sec 0 usec RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) Wireless event: cmd=0x8b1a len=40 Authentication with 00:00:00:00:00:00 timed out. BSSID 00:00:00:00:00:00 blacklist count incremented to 2 No keys have been configured - skip key clearing State: SCANNING -> DISCONNECTED wpa_driver_wext_set_operstate: operstate 0->0 (DORMANT) WEXT: Operstate: linkmode=-1, operstate=5 EAPOL: External notification - portEnabled=0 EAPOL: External notification - portValid=0 EAPOL: External notification - EAP success=0 Setting scan request: 0 sec 0 usec State: DISCONNECTED -> SCANNING Starting AP scan (broadcast SSID) ioctl[SIOCSIWSCAN]: Device or resource busy Scan requested (ret=-1) - scan timeout 30 seconds Failed to initiate AP scan. Setting scan request: 10 sec 0 usec EAPOL: External notification - portValid=0 EAPOL: External notification - EAP success=0 Setting scan request: 0 sec 0 usec RTM_NEWLINK: operstate=0 ifi_flags=0x1043 ([UP][RUNNING]) Wireless event: cmd=0x8b15 len=20 Wireless event: new AP: 00:00:00:00:00:00 BSSID 00:00:00:00:00:00 blacklist count incremented to 2 CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys wpa_driver_wext_set_key: alg=0 key_idx=0 set_tx=0 seq_len=0 key_len=0 wpa_driver_wext_set_key: alg=0 key_idx=1 set_tx=0 seq_len=0 key_len=0 wpa_driver_wext_set_key: alg=0 key_idx=2 set_tx=0 seq_len=0 key_len=0 wpa_driver_wext_set_key: alg=0 key_idx=3 set_tx=0 seq_len=0 key_len=0 wpa_driver_wext_set_key: alg=0 key_idx=0 set_tx=0 seq_len=0 key_len=0 State: DISCONNECTED -> DISCONNECTED wpa_driver_wext_set_operstate: operstate 0->0 (DORMANT) WEXT: Operstate: linkmode=-1, operstate=5 EAPOL: External notification - portEnabled=0 EAPOL: External notification - portValid=0 EAPOL: External notification - EAP success=0 RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan0' added RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) Wireless event: cmd=0x8b1a len=40 RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) Wireless event: cmd=0x8b1a len=40 State: DISCONNECTED -> SCANNING Starting AP scan (broadcast SSID) ioctl[SIOCSIWSCAN]: Device or resource busy Scan requested (ret=-1) - scan timeout 30 seconds Failed to initiate AP scan. No keys have been configured - skip key clearing State: 4WAY_HANDSHAKE -> DISCONNECTED wpa_driver_wext_set_operstate: operstate 0->0 (DORMANT) WEXT: Operstate: linkmode=-1, operstate=5 EAPOL: External notification - portEnabled=0 EAPOL: SUPP_PAE entering state DISCONNECTED Setting scan request: 10 sec 0 usec EAPOL: SUPP_BE entering state INITIALIZE EAPOL: External notification - portValid=0 EAPOL: External notification - EAP success=0 Setting scan request: 0 sec 0 usec RTM_NEWLINK: operstate=0 ifi_flags=0x1043 ([UP][RUNNING]) Wireless event: cmd=0x8b15 len=20 Wireless event: new AP: 00:00:00:00:00:00 BSSID 00:00:00:00:00:00 blacklist count incremented to 2 CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys wpa_driver_wext_set_key: alg=0 key_idx=0 set_tx=0 seq_len=0 key_len=0 wpa_driver_wext_set_key: alg=0 key_idx=1 set_tx=0 seq_len=0 key_len=0 wpa_driver_wext_set_key: alg=0 key_idx=2 set_tx=0 seq_len=0 key_len=0 wpa_driver_wext_set_key: alg=0 key_idx=3 set_tx=0 seq_len=0 key_len=0 wpa_driver_wext_set_key: alg=0 key_idx=0 set_tx=0 seq_len=0 key_len=0 State: DISCONNECTED -> DISCONNECTED wpa_driver_wext_set_operstate: operstate 0->0 (DORMANT) WEXT: Operstate: linkmode=-1, operstate=5 EAPOL: External notification - portEnabled=0 EAPOL: External notification - portValid=0 EAPOL: External notification - EAP success=0 RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) RTM_NEWLINK, IFLA_IFNAME: Interface 'wlan0' added RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) Wireless event: cmd=0x8b1a len=40 RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) Wireless event: cmd=0x8b1a len=40 State: DISCONNECTED -> SCANNING Starting AP scan (broadcast SSID) ioctl[SIOCSIWSCAN]: Device or resource busy Scan requested (ret=-1) - scan timeout 30 seconds Failed to initiate AP scan. Setting scan request: 10 sec 0 usec RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) Wireless event: cmd=0x8b19 len=8 RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) Wireless event: cmd=0x8b19 len=8 RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) Wireless event: cmd=0x8b19 len=8 RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) Wireless event: cmd=0x8b19 len=8 RTM_NEWLINK: operstate=0 ifi_flags=0x1003 ([UP]) Wireless event: cmd=0x8b19 len=8 ioctl[SIOCGIWSCAN]: Resource temporarily unavailable Failed to get scan results Failed to get scan results - try scanning again Setting scan request: 1 sec 0 usec ioctl[SIOCGIWSCAN]: Resource temporarily unavailable Failed to get scan results Failed to get scan results - try scanning again Setting scan request: 1 sec 0 usec ioctl[SIOCGIWSCAN]: Resource temporarily unavailable Failed to get scan results Failed to get scan results - try scanning again Setting scan request: 1 sec 0 usec ioctl[SIOCGIWSCAN]: Resource temporarily unavailable Failed to get scan results Failed to get scan results - try scanning again Setting scan request: 1 sec 0 usec ioctl[SIOCGIWSCAN]: Resource temporarily unavailable Failed to get scan results Failed to get scan results - try scanning again Setting scan request: 1 sec 0 usec Starting AP scan (broadcast SSID) ioctl[SIOCSIWSCAN]: Device or resource busy Scan requested (ret=-1) - scan timeout 30 seconds Failed to initiate AP scan. Setting scan request: 10 sec 0 usec Starting AP scan (broadcast SSID) ioctl[SIOCSIWSCAN]: Device or resource busy Scan requested (ret=-1) - scan timeout 30 seconds Starting AP scan (broadcast SSID) > From: helmut.schaa at googlemail.com > To: eric_lvjun at hotmail.com > Subject: Re: [ath9k-devel] About the video problem of ath9k_htc > Date: Sat, 21 Aug 2010 15:23:08 +0200 > CC: ath9k-devel at lists.ath9k.org > > Hi, > > Am Saturday 21 August 2010 schrieb LvEric: > > I am using the ath9k_htc driver for TL -WN721N on my Linux Set top box. > > > > after insmod all moudles, plugin the TL-WN721N ,and run "wlist wlan0 scan", > > > > It can works,but the video output became sharking when scaning, when it finish the scaning, > > > > the video back to normal. why? This driver oprate some video output? Or something is same as the video driver? > > > > Any body known what is the reason of this? > > One possible explanation would be because the scanning involves changing > the channel and as a result the wifi card cannot exchange data with the AP > during that time (I just assume your set top box is configured as wireless > STA and associates with an AP since otherwise you wouldn't need to scan). > > However, the software scan implementation in mac80211 uses the configured qos > requiremenets to determine how many channels to scan at once. In order to > reduce the average latency at the cost of a longer wireless scan duration you > can use something like the attached python script (this will set the qos > latency to 300ms while running, however not sure if the script is still up to > date). This should advise mac80211 to not leave the operating channel for > longer periods of time than 300ms (or by a different value you put in there). > > And one more thing: the scan implementation in mac80211 does not respect > DTIM beacons at all and thus won't work nicely with mutli- and boradcast > traffic at all. Not sure if that applies to your issue. > > HTH, > Helmut -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.ath9k.org/pipermail/ath9k-devel/attachments/20100822/5410fd8b/attachment-0001.htm ^ permalink raw reply [flat|nested] 16+ messages in thread
* [ath9k-devel] About the video problem of ath9k_htc 2010-08-21 6:53 [ath9k-devel] About the video problem of ath9k_htc LvEric 2010-08-21 11:41 ` Peter Stuge 2010-08-21 13:23 ` Helmut Schaa @ 2010-08-23 3:25 ` Senthilkumar Balasubramanian 2010-08-23 5:58 ` LvEric 2010-08-26 17:30 ` LvEric 2010-08-27 5:14 ` Alan 3 siblings, 2 replies; 16+ messages in thread From: Senthilkumar Balasubramanian @ 2010-08-23 3:25 UTC (permalink / raw) To: ath9k-devel 2010/8/21 LvEric <eric_lvjun@hotmail.com> > Hi All, > > I am using the ath9k_htc driver for TL -WN721N on my Linux Set top box. > after insmod all moudles, plugin the TL-WN721N ,and run "wlist wlan0 > scan", > It can works,but the video output became sharking when scaning, when it > finish the scaning, > AR9271 consumes more CPU during scanning and also the scan time higher and we are addressing this isssue.. From the symptoms, it looks to me that it may be an issue related to scaning.. We should be sending out the fixes soon.. > the video back to normal. why? This driver oprate some video output? Or > something is same as the video driver? > Any body known what is the reason of this? > > Thanks. > > _______________________________________________ > ath9k-devel mailing list > ath9k-devel at lists.ath9k.org > https://lists.ath9k.org/mailman/listinfo/ath9k-devel > > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.ath9k.org/pipermail/ath9k-devel/attachments/20100823/c061d9e8/attachment.htm ^ permalink raw reply [flat|nested] 16+ messages in thread
* [ath9k-devel] About the video problem of ath9k_htc 2010-08-23 3:25 ` Senthilkumar Balasubramanian @ 2010-08-23 5:58 ` LvEric 2010-08-23 14:48 ` pat-lkml 2010-08-26 17:30 ` LvEric 1 sibling, 1 reply; 16+ messages in thread From: LvEric @ 2010-08-23 5:58 UTC (permalink / raw) To: ath9k-devel Hi Friend, In my case, the video Shaking all the time when TL -WN721N is wroking. It means not only scaning. maybe it consumes more resource when AR9271 working not only scaning. Please send me the solution when you fix,I can test it on my box and feedbak. Thanks very much,wish it will be fixed soon. Date: Mon, 23 Aug 2010 08:55:06 +0530 Subject: Re: [ath9k-devel] About the video problem of ath9k_htc From: senthil.balasubramanian@gmail.com To: eric_lvjun at hotmail.com CC: ath9k-devel at lists.ath9k.org 2010/8/21 LvEric <eric_lvjun@hotmail.com> Hi All, I am using the ath9k_htc driver for TL -WN721N on my Linux Set top box. after insmod all moudles, plugin the TL-WN721N ,and run "wlist wlan0 scan", It can works,but the video output became sharking when scaning, when it finish the scaning, AR9271 consumes more CPU during scanning and also the scan time higher and we are addressing this isssue.. From the symptoms, it looks to me that it may be an issue related to scaning.. We should be sending out the fixes soon.. the video back to normal. why? This driver oprate some video output? Or something is same as the video driver? Any body known what is the reason of this? Thanks. _______________________________________________ ath9k-devel mailing list ath9k-devel at lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.ath9k.org/pipermail/ath9k-devel/attachments/20100823/aa9ee329/attachment.htm ^ permalink raw reply [flat|nested] 16+ messages in thread
* [ath9k-devel] About the video problem of ath9k_htc 2010-08-23 5:58 ` LvEric @ 2010-08-23 14:48 ` pat-lkml 2010-08-23 16:14 ` Lv追风 0 siblings, 1 reply; 16+ messages in thread From: pat-lkml @ 2010-08-23 14:48 UTC (permalink / raw) To: ath9k-devel An HTML attachment was scrubbed... URL: http://lists.ath9k.org/pipermail/ath9k-devel/attachments/20100823/65dbb727/attachment.htm ^ permalink raw reply [flat|nested] 16+ messages in thread
* [ath9k-devel] About the video problem of ath9k_htc 2010-08-23 14:48 ` pat-lkml @ 2010-08-23 16:14 ` Lv追风 2010-08-23 16:19 ` pat-lkml 2010-08-23 21:17 ` Peter Stuge 0 siblings, 2 replies; 16+ messages in thread From: Lv追风 @ 2010-08-23 16:14 UTC (permalink / raw) To: ath9k-devel Hi Friend, I use the normal AV line, connect to my USB EasyCap,and capture the video by my PC. It also shaking... So I think the shaking happened when the video is outputed. And it also make my remote control works in error, Do you have this experience? Eric Date: Mon, 23 Aug 2010 10:48:26 -0400 From: pat-lkml@erley.org To: eric_lvjun at hotmail.com CC: ath9k-devel at lists.ath9k.org Subject: Re: [ath9k-devel] About the video problem of ath9k_htc I've experienced similar, the fixes were to: Use higher quality video cables (non-hdmi case), add space between the wireless card and the TV (crappy CRT Tv). replacing the cables with better shielded ones will likely solve it for you, as switching to HDMI fixed it. Pat On 8/23/2010 1:58 AM, LvEric wrote: Hi Friend, In my case, the video Shaking all the time when TL -WN721N is wroking. It means not only scaning. maybe it consumes more resource when AR9271 working not only scaning. Please send me the solution when you fix,I can test it on my box and feedbak. Thanks very much,wish it will be fixed soon. Date: Mon, 23 Aug 2010 08:55:06 +0530 Subject: Re: [ath9k-devel] About the video problem of ath9k_htc From: senthil.balasubramanian@gmail.com To: eric_lvjun at hotmail.com CC: ath9k-devel at lists.ath9k.org 2010/8/21 LvEric <eric_lvjun@hotmail.com> Hi All, I am using the ath9k_htc driver for TL -WN721N on my Linux Set top box. after insmod all moudles, plugin the TL-WN721N ,and run "wlist wlan0 scan", It can works,but the video output became sharking when scaning, when it finish the scaning, AR9271 consumes more CPU during scanning and also the scan time higher and we are addressing this isssue.. From the symptoms, it looks to me that it may be an issue related to scaning.. We should be sending out the fixes soon.. the video back to normal. why? This driver oprate some video output? Or something is same as the video driver? Any body known what is the reason of this? Thanks. _______________________________________________ ath9k-devel mailing list ath9k-devel at lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel _______________________________________________ ath9k-devel mailing list ath9k-devel at lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.ath9k.org/pipermail/ath9k-devel/attachments/20100824/30e89473/attachment.htm ^ permalink raw reply [flat|nested] 16+ messages in thread
* [ath9k-devel] About the video problem of ath9k_htc 2010-08-23 16:14 ` Lv追风 @ 2010-08-23 16:19 ` pat-lkml 2010-08-23 21:17 ` Peter Stuge 1 sibling, 0 replies; 16+ messages in thread From: pat-lkml @ 2010-08-23 16:19 UTC (permalink / raw) To: ath9k-devel An HTML attachment was scrubbed... URL: http://lists.ath9k.org/pipermail/ath9k-devel/attachments/20100823/2d2d2242/attachment.htm ^ permalink raw reply [flat|nested] 16+ messages in thread
* [ath9k-devel] About the video problem of ath9k_htc 2010-08-23 16:14 ` Lv追风 2010-08-23 16:19 ` pat-lkml @ 2010-08-23 21:17 ` Peter Stuge 1 sibling, 0 replies; 16+ messages in thread From: Peter Stuge @ 2010-08-23 21:17 UTC (permalink / raw) To: ath9k-devel Lv?? wrote: > I use the normal AV line, connect to my USB EasyCap,and capture the > video by my PC. Ok, so both video and wifi runs over USB. Are you using a USB hub? Any other USB devices? I suggest removing as many USB devices as possible, and testing again with *only* the wifi and the video connected directly to USB ports in the computer. If you are using a USB hub it can definately cause problems. If everything works when wifi and video are connected directly to the PC then you have to experiment with different hubs to find one that works for you. I have encountered many hubs which do not work well at all, especially with isochronous transfers used by audio and video devices. //Peter ^ permalink raw reply [flat|nested] 16+ messages in thread
* [ath9k-devel] About the video problem of ath9k_htc 2010-08-23 3:25 ` Senthilkumar Balasubramanian 2010-08-23 5:58 ` LvEric @ 2010-08-26 17:30 ` LvEric 2010-08-26 17:36 ` pat-lkml 1 sibling, 1 reply; 16+ messages in thread From: LvEric @ 2010-08-26 17:30 UTC (permalink / raw) To: ath9k-devel Hi Friends, These days I try to move to zd1211rw for my wireless.And buy a device. It works more better.But also find video shaking problem happened when the device was initing and iwlist wlan0 scan. And when it is working,some time make the video smoll shaking. But it works much more better than Ath9k_htc. zd1211rw also have this problem, if it means compat have some problem of this too? My wireless is working now, but wish somebody can fix this problem. Let the wireless can be working everywhere. Thanks. Date: Mon, 23 Aug 2010 08:55:06 +0530 Subject: Re: [ath9k-devel] About the video problem of ath9k_htc From: senthil.balasubramanian@gmail.com To: eric_lvjun at hotmail.com CC: ath9k-devel at lists.ath9k.org 2010/8/21 LvEric <eric_lvjun@hotmail.com> Hi All, I am using the ath9k_htc driver for TL -WN721N on my Linux Set top box. after insmod all moudles, plugin the TL-WN721N ,and run "wlist wlan0 scan", It can works,but the video output became sharking when scaning, when it finish the scaning, AR9271 consumes more CPU during scanning and also the scan time higher and we are addressing this isssue.. From the symptoms, it looks to me that it may be an issue related to scaning.. We should be sending out the fixes soon.. the video back to normal. why? This driver oprate some video output? Or something is same as the video driver? Any body known what is the reason of this? Thanks. _______________________________________________ ath9k-devel mailing list ath9k-devel at lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.ath9k.org/pipermail/ath9k-devel/attachments/20100827/5a37f108/attachment.htm ^ permalink raw reply [flat|nested] 16+ messages in thread
* [ath9k-devel] About the video problem of ath9k_htc 2010-08-26 17:30 ` LvEric @ 2010-08-26 17:36 ` pat-lkml 2010-08-26 18:25 ` LvEric 0 siblings, 1 reply; 16+ messages in thread From: pat-lkml @ 2010-08-26 17:36 UTC (permalink / raw) To: ath9k-devel An HTML attachment was scrubbed... URL: http://lists.ath9k.org/pipermail/ath9k-devel/attachments/20100826/49935c1a/attachment.htm ^ permalink raw reply [flat|nested] 16+ messages in thread
* [ath9k-devel] About the video problem of ath9k_htc 2010-08-26 17:36 ` pat-lkml @ 2010-08-26 18:25 ` LvEric 0 siblings, 0 replies; 16+ messages in thread From: LvEric @ 2010-08-26 18:25 UTC (permalink / raw) To: ath9k-devel Hi Pat, I try your suggestion, move the wireless device far from my box and TV by an extern USB line (about 2m length). But it have the same problem.TL-WN721N make the video shaking when it is working,and zd1211rw shaking when it scan the network. Date: Thu, 26 Aug 2010 13:36:04 -0400 From: pat-lkml@erley.org To: eric_lvjun at hotmail.com CC: senthil.balasubramanian at gmail.com; ath9k-devel at lists.ath9k.org Subject: Re: [ath9k-devel] About the video problem of ath9k_htc On 8/26/2010 1:30 PM, LvEric wrote: Hi Friends, These days I try to move to zd1211rw for my wireless.And buy a device. It works more better.But also find video shaking problem happened when the device was initing and iwlist wlan0 scan. And when it is working,some time make the video smoll shaking. But it works much more better than Ath9k_htc. zd1211rw also have this problem, if it means compat have some problem of this too? My wireless is working now, but wish somebody can fix this problem. Let the wireless can be working everywhere. Thanks. There is no way a driver can fix RF interference in a case like this. The only solutions involve changing your physical environment (or the laws of physics). Replace the tv cables, and/or move the wireless card away from them. a 2m USB Extension cable to move the wireless card away from the computer will not be expensive, will not affect performance, and will very likely fix the problem. Pat Erley -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.ath9k.org/pipermail/ath9k-devel/attachments/20100827/c17c9e3b/attachment.htm ^ permalink raw reply [flat|nested] 16+ messages in thread
* [ath9k-devel] About the video problem of ath9k_htc 2010-08-21 6:53 [ath9k-devel] About the video problem of ath9k_htc LvEric ` (2 preceding siblings ...) 2010-08-23 3:25 ` Senthilkumar Balasubramanian @ 2010-08-27 5:14 ` Alan 3 siblings, 0 replies; 16+ messages in thread From: Alan @ 2010-08-27 5:14 UTC (permalink / raw) To: ath9k-devel Does the video cable have a ferrite ring? If not, I think you could try buying one and putting it close to the end of the cable that goes into the monitor / tv. http://en.wikipedia.org/wiki/Ferrite_bead 2010/8/21 LvEric <eric_lvjun@hotmail.com>: > Hi All, > > I am using the ath9k_htc driver for TL -WN721N on my Linux Set top box. > after insmod all moudles,? plugin the TL-WN721N ,and run? "wlist wlan0 > scan", > It can works,but the video output became sharking when scaning, when it > finish the scaning, > the video back to normal. why? This driver oprate some video output? Or > something is same as the video driver? > Any body known what is the reason of this? > > Thanks. ^ permalink raw reply [flat|nested] 16+ messages in thread
end of thread, other threads:[~2010-08-27 5:14 UTC | newest] Thread overview: 16+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2010-08-21 6:53 [ath9k-devel] About the video problem of ath9k_htc LvEric 2010-08-21 11:41 ` Peter Stuge 2010-08-21 13:23 ` Helmut Schaa 2010-08-22 6:22 ` LvEric 2010-08-22 9:59 ` Helmut Schaa 2010-08-22 7:53 ` LvEric 2010-08-23 3:25 ` Senthilkumar Balasubramanian 2010-08-23 5:58 ` LvEric 2010-08-23 14:48 ` pat-lkml 2010-08-23 16:14 ` Lv追风 2010-08-23 16:19 ` pat-lkml 2010-08-23 21:17 ` Peter Stuge 2010-08-26 17:30 ` LvEric 2010-08-26 17:36 ` pat-lkml 2010-08-26 18:25 ` LvEric 2010-08-27 5:14 ` Alan
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