Titan's Power Kernel bug? - Can't see DD-WRT APs
 

Hey all,

After installing the power kernel my phone could no longer see a DD-WRT AP at all (Two WRT160NLs running DD-WRT v24-sp2), even after deleting the existing connection settings and rebooting. I could still see and connect to other APs. Reinstalling the stock kernel fixed everything. I've found one other mention of the same problem:

http://talk.maemo.org/showpost.php?p...postcount=3355

Can anyone else confirm?

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

Nope, I can see all of my DD-WRT APs.

2d

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

What version are you running? I wonder if it might be a problem with DD-WRT v24-sp2. That's the version both me and apolkosnik were having trouble with.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

I'm running v24-SP2 here (SVN revision 13525 std) and I'm not having any problems.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

Nope I'm using v24-sp2 mini-special. Never had any problems. Im guessing its how you have wrt configured.

2d

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

The only thing unusual about the setup here is that there are multiple APs with the same SSID so that you can roam across them as you move around. Apart from that it's all pretty normal settings.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

Anyone else using WPA2-AES encryption? That's another thing me and apolkosnik have in common:

http://talk.maemo.org/showpost.php?p...postcount=3346

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

No problem with titan's kernel and DD-WRT.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

I use DD-WRT v24 with WPA2-AES client bridged to a router running Tomato 1.27 - with no issues whatsoever. Seamless roaming between the 2 routers with different BSSID. The WAN-connected router controls everything (DHCP, DNS etc) and the bridge simply forwards requests. I enable SSID broadcast, however.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

Yeah, that's what I'm using.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

I'm also using DD-WRT and Titan, no problems whatsoever.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

I'm also using DD-WRT and Titan, no problems whatsoever.
(Bundyo saves me typing! :-)

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

What channels are the DD-WRT APs using? I'm thinking the power kernel might be getting stuck on the US regulatory domain for some reason.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

LOL that was really funny, i'll just use it once more (:

I'm also using DD-WRT and Titan, no problems whatsoever.
To be more precise, I am using a linksys wrt54g2 flashed to ddwrt with tftp, works great.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

They're both set to auto channel selection. Yesterday the one I was trying to connect to was on 1.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

I may have coma cross this issue, I have no answers but I like the theory of channel switching issues. I was in Europe and the hotel I was staying at used linksys routers that I commonly see flashed as DD-WRT ap's. I could not connect to the wifi for the life of me no matter whether I restarted either device. My wife was able to connect her Symbian E72 with no problems.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

I'm using a DLink (original firmware) as the main router and a linksys (dd-wrt) as a repeater bridge and no problems. Currently using AES, but TKIP works well.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

same problem here, check the bug: https://garage.maemo.org/tracker/ind...1528&atid=5521

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

I may have a similar issue. I just got a Buffalo ZR-HP-G300NH and flashed the latest DD-WRT firmware (don't have specific version number).

Here is the interesting part. When I use no encryption, I am unable to see/connect to the AP. However when I use any encryption to (WEP, WPA2, etc) I am able to see and connect to it.

I am using the same sid as my old linksys WRT54G (also running DD-WRT). Do you think it could have something cached that associates the MAC and sid of that particular AP?

Any ideas how to resolve? FYI, I want to keep my AP open (no encryption).

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

As a side question, why exactly would you want to keep your AP open?

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

I'm also using DD-WRT and Titan, no problems whatsoever.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

Can those who are running without issue confirm if they are using Mixed mode or Only G mode for the AP's.

This is the cause of the problem which i am having with my DDWRT router and i think the same that everyone who is having a problem here is facing.

It simply cannot even see the router when it is set to mixed N/G mode.
The bug link is https://bugs.maemo.org/show_bug.cgi?id=10893.

Unfortunately the person who raised it simply closed it because he changed to openwrt instead of following up to close it for ddwrt.

The issue could be ddwrt's fault as to how it implements signalling for moxed mode or how N900 reads it.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

The network I'm having trouble with is set to B/G/N mode (that's what I infer from "Mixed." It lists Mixed, B-Only, G-Only, BG-Mixed, NG-Mixed, and N-only.)

I doubt there's anything older than a G adapter connected though (typically a bunch of recent Blackberries and iPhones, laptops with G or newer adapters, and my N900) so it could be operating in NG mode, but the Wireless status just shows "Mixed."

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

Allright sounds like its the same issue.
You wont have the problem if you set it to G only mode.

I have edited my post above with the bug in maemo.org.

If you have additional info, please do raise a new one to check if maemo is the cause of the issue. If not we can bug ddwrt instead.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

I have no problem connecting to the same network in the same mode when using the stock kernel, only the power kernel, so the bug is either in the power kernel or DD-WRT (although DD-WRT is looking more likely now).

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

My specific settings on the router:

Router: Buffalo WHR-HP-AG108
Firmware: DD-WRT v24-sp2 (10/10/09) std - build 13064

This router has 2 network interfaces (one is A, one is B/G). I will skip listing the settings for the A interface since N900 does not have 802.11a and is irrelevant here.

The second interface is the B/G antenna and here are my settings:

Regulatory Domain - UNITED_STATES
TX Power - 20 dBm
Antenna Gain - 0 dBi
Wireless Mode - AP
Wireless Network Mode - Mixed
Noise Immunity - Auto
Noise Immunity Level - 4
OFDM Weak Detection - Enable
Protection Mode - None
RTS Threshold - Disable
Transmission Minimum Rate - Auto
Transmission Maximum Rate - Auto
Short Preamble - Disable
Extended Range - Disable
Super G Fast Framing - Disable
Outdoor Band - Disable
Channel Width - Full (20 MHz)
Diversity - Disable
TX Antenna - Primary
RX Antenna - Primary
AP Isolation - Disable
WMM Support - Disable
Wireless Network Name (SSID) - whatever
Radar Detection - Disable
Wireless Channel - Auto
Wireless SSID Broadcast - Enable
ScanList - default
Sensitivity Range (ACK Timing) - 2000
Max Associated Clients - 256
MTik Compatibility - Disable
Network Configuration - Bridged



In the Wireless Security section, this interface is set up as:
Security Mode - WPA2-Personal
WPA Algorithms - AES
WPA Shared Key - secret
Key Renewal Interval (in seconds) - 3600


WDS is disabled. MAC filter is disabled.

I am using DNSMasq (enabled on Services page) and on the main Setup page I have "Use DNSMasq for DHCP", "Use DNSMasq for DNS" and "DHCP-Authoritative" all enabled.

Hope that helps.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

I am having similar issue and I think it is Maemo issue as I am able to connect to the WIFI (DD-WRT, NG-MIXED, WPa2-PSK) when booted with NITDroid and not with Maemo. To fix the issue I had to set my router to G-Only for now while I find a fix for it.

Here is my setup
N900 connected when
Router : - DIR-615 C1 on DD-WRT build dt 8/12/2010 with G-Only and WPA2-PSK setting.

N900 connected when booted with NITDriod
Router : - DIR-615 C1 on DD-WRT build dt 8/12/2010 with NG-Mixed and WPA2-PSK setting.

N900 not connected when booted with Power40 Kernel and
Router : - DIR-615 C1 on DD-WRT build dt 8/12/2010 with NG-mixed and WPA2-PSK setting.

I see wl1251 down or link not ready error in dmesg. I don't know if there is any firmware realted to wl1251 chip that is used in NITdriod that can be ported into Maemo5 to fix this issue.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

Thanks for doing research, please comment the corresponding bug is NOT resolved. Glad I'm not the only one.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

This is more or less my stance
http://www.schneier.com/blog/archive...n_wireles.html

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

Hmm I was just going to reflash my home DIR-615 C1 to DD-WRT, maybe I better wait...

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

uhhh maybe you guys should reset your router settings.
i'm able to use mixed mode on my Linksys WRT310N DD-WRT v24-sp2 (08/07/10) std - build 14896
At least make sure you haven't enabled anything under wireless - advanced that is non standard.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

Can you post your Advance Settings as I remember I didn't change any Values there, but want to make sure.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

well, everything with a setting shows to the right (Default: xxxx)
just make sure it all matches the default
frame burst should be "disable", it's missing that default info

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

I was first able to connect to my Buffalo WZR-HP-G300NH running "DD-WRT v24SP2-EU-US (08/19/10) std" fine. After upgrading to the titan kernel I could no longer see the AP. Manually creating a connection to the wifi through the command line, using various tools to scan for the AP failed. Performing a kernel deinstall let me see the AP again, so i removed all saved wifi connections and reinstalled the power titan kernel hoping it only had a problem seeing/connecting to known APs; this didn't prove fruitful.
Then I installed the bleeding edge drivers, and everything works fine once the drivers are loaded using the included load.sh.
Bleeding edge wl1251 wifi drivers worked for me without changing settings on the AP, but I can't see the dd-wrt AP with titan, without bleeding edge

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

"Upgraded" to the Advanced kernel yesterday. And am now unable to see my network in my N900 as well.

When set to B-only it works.
When set to G-only it works.
When set to any of the mixed variants it won't work.

I am using a TP-Link TL-WR1043ND with Firmware Version DD-WRT v24-sp2 (08/07/10) std - build 14896

Another network in my building is using DD-WRT as well. With broadcast SSID enabled and this one won't show up anymore as well.

Is it safe to assume this is a DD-WRT problem and should be fixed by them?

Edit:
After looking at dd-wrt forums and upgrading/changing to build 15962 Mixed mode works like a charm.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

I am in the exact same situation... I received this for my birthday, and I know it wasn't cheap. I'm not sure what to do.

Do the bleeding edge wifi drivers drain your battery faster? I read somewhere on these forums that they did...

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

The I presume you also read that they don't, in the same "somewhere"?

As far as I can tell, only a couple of people ever reported battery drain being higher with bleeding edge wifi drivers. Given how many other people said their battery life was just as fine as before, however, I am inclined to think it's not the driver.

For what it's worth, I'm in the category of "had no problem with bleeding edge drivers". 'course, if you do something stupid like turn on monitor mode and then leave it in monitor mode, yeah, it'll eat battery, but so would a wifi connection with the same amount of traffic, so that's not extra battery drain.

Personally, I don't even bother with the stock wifi driver, and most of the time, I just use the command line to load the bleeding edge one immediately after I boot up my N900, and then use that.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

A new build of the power kernel is coming out this weekend that might fix this bug, just wait a few days...

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

I do not look forward to the usual extract-image, append-to-uboot, flash-kernel routine that I do, but I'm happy to hear the power kernel is getting updated.

Out of curiosity, where is this mentioned? Also, is there any word on whether or not Titan's including the cfg80211 module? Because if he's doing that, then lxp doesn't have to provide his own kernel images anymore, and can just update drivers if necessary, I believe.

Re: Titan's Power Kernel bug? - Can't see DD-WRT APs
 

Last comment here:

https://garage.maemo.org/tracker/?fu...&group_id=1528