Interesting, didn't realize you needed a higher channel for more transmit power. Anyways, I adjusted transmit power to 27dBm - speedtest only returned: http://www.dslreports.com/speedtest/914739 (not much of a difference)

To give you an idea of potential spectrum congestion:

In case you want to peruse through my scattered speed test notes, check below. All speed tests were done (unless otherwise noted) via speedtest.net directly to the ISP's server.

Please excuse the mess, the notes were originally just intended for my troubleshooting.

v2 openwrt snapshot 6.25
ac auto 80hz 17dBm WPA2
it drops download speed to all devices
    desktop
        1. 290d    362u
        2. 290d    359u
        3. 131d    358u
        4. 130d    359u
        5.  37d    360u
        6.  45d    363u
        7.  61d    361u
        8.  53d    360u
        9.  35d    355u
        0.  30d    360u
        AGAIN
        1. 369d 330u
        2. 372d 302u
        3. 282d    351u
        4. 297d    363u
        5. 285d    277u
        6. 291d    341u
        7. 268d    330u
        8. 251d    284u
        9. 277d    347u
        0. 150d    326u

v2 stock 2.0.7 | WPA2 personal | mixed | auto channel | auto width
    desktop - rebooted after factory reset | waited ~15 min to run test
        1. 24d 47u
        2. ""
        3. ""
        4. ""
        5. 
        6. 
        7. 
        8. 
        9. 
        0. 
_______________________________________________________________________________________

v1 stock
mixed wpa2
    desktop
        probably 1.1.9 firmware
        1. 393d    120u
        2. 373d 136u
        3. 394d 111u
        4. 409d 118u - rebooted router prior to this test run
        5. 412d 112u
        6. 418d 126u
        7. 428d 128u
        8. 424d 137u
        9. 413d 355u
        0. 395d 125u
        
        fresh flash, 1.1.8 firmware
        1. 440d 364u
        2. 441d 367u
        3. 437d 332d
        4. 436d 354u
        5. 448d 369u
        6. 443d 376u
        7. 438d 344u
        8. 448d 378u
        9. 445d 371u
        0. 435d 368u
        
        fresh upgrade, 1.1.9 firmware
        1. 402d 111u  - rebooted router after this test run
        2. 446d 360u
        3. 433d 359u
        4. 437d 364u
        5. 432d 368u
        6. 427d 368u
        7. 430d 362u
        8. 427d 354u
        9. 430d 366u
        0. 420d 365u
                
v1 openwrt snapshot 6.25    
    desktop
        1. 256d 262u
        2. 253d 199u
        3. 255d 324u
        4. 261d 263u - rebooted router after this test run
        5. 252d 247u
        6. 253d 293u
        7. 234d 213u
        8. 251d 230u
        9. 231d 255u
        0. 246d 287u
        
v1 openwrt snapshot 6.27
    WPA2-PSK | ac | auto channel | 80hz width
    desktop (rebooted router after flashing snapshot from stock)
        1. 237d 229u
        2. 257d 237u
        3. 265d 219u
        4. 271d 257u
        5. 253d 292u
        6. 272d 281u
        7. 261d 247u
        8. 243d 236u
        9. 240d 294u
        0. 284d 267u
_______________________________________________________________________________________            

2nd v2 latest stock fw bawx
    1. 24d 36u
    2. 24d 50u
    3. 24d 49u
    4. 25d 49u
    5. 24d 50u
    
2nd v2 latest stock fw bitfiend
    1. 27d 51u
    2. 27d 52u
    3. 26d 33u
        
2nd v2 latest stock fw pixel
    1. 333d 157u 
    2. 316d 151u
    3. 300d 175u
    4. 285d 151u (rebooted router after this run)
    5. 309d 142u
    6. 305d 150u
    7. 295d    146u
    8. 288d 158u
    9. 287d 152u
    0. 297d 163u
    
2nd v2 openwrt rc3 pixel
    1.  39d 112u
    2.  Can't run further tests because router stops responding / 5ghz goes down
    
2nd v2 openwrt rc3 bawx
    1. 364d 299u
    2.  86d 275u
    3.  28d 280u
    4.  28d 272u
    5.  30d 284u (rebooted router after this run)
    6. 362d 359u
    7. 292d 301u
    8.  14d 301u
    9.  20d 282u
    0.  20d 294u
    
2nd v2 openwrt rc3 bawx
    366d 400u
    299d 401u
    176d 385u (connected pixel after this)
     31d 396u
     
2nd v2 openwrt 7.17 snapshot bawx (didn't enable 2.4 wireless)
    366d 397u
    365d 400u
    354d 392u
    364d 393u
    364d 397u
    366d 401u
    107d 405u
     26d 384u
     39d 394u
     52d 402d
     49d 394u
     
2nd v2 stock bawx (factory reset gateway and router)
     25d 51u
     24d 51u
     
2nd v2 stock bawx (moved router to gateway, changed ethernet, restarted gateway/ont/router/PC)
     22d 40u
     23d 41u
     
2nd v2 stock PIXEL (moved router to gateway, changed ethernet, restarted gateway/ont/router)
    217d 112u
    224d  91u
    232d  86u
    163d  83u
    216d  86u
    217d  87u
    199d  67u
    186d  88u
    
2nd v2 rc3 bawx (fresh wipe, using dsl reports)
    356d 207u
    315d 213u
    215d 191u
    226d 190u
    216u 173u
    182d 194u
    189d 215u
    126d 189u
    118d 128u

noticed router luci is generally slow / unresponsive v2
    
2nd v2 rc3 bawx (enabled sqm 950000, fresh reboot, using dsl reports) - bufferbloat was low <50 on all tests
    367d 229u
    366d 249u
    365d 235u
    151d 222u
     90d 125u
     84d 131u
     83d 110u

2nd v2 rc3 bawx (enabled sqm 600000, fresh reboot, using dsl reports)  - bufferbloat was low <50 on all tests
    361d 283u
    340d 248u
    339d 178u
    341d 179u
    333d 181u
    293d 156u
    297d 156u
    213d 130u
    183d 140u
    167d 149u
     32d 127u - run on speedtests.net att charlotte 
    127d 139u - back on dslreports

20/40 coexistence auto
40 MHz intolerant>disable
bandwidth capability 11/a/b/g: 20/40mhz
minimum power consumption>disable
power output> 100%
make sure you are on best rate 80211a
band preference >none

These are what I have on mine there are other options if you have questions I will let you know what I have set.

Also on the wifi status in the router your bitrate was low but so was your signal If I'm not 95+%  I will not get to 702meg this is the one that will matter in your case you need more signal strength.

Changed:
Bandwidth Capability from "11a:20/40;11bg:20MHz" to "11a/b/g:20/40MHz"
Minimum Power Consumption from "Enabled" to "Disabled"

All other settings mentioned were the same.

Without rebooting the router again (just disabled/re-enabled WiFi on desktop) - http://www.dslreports.com/speedtest/914869
Same speeds, unless you think the settings required a PC reboot to take affect.

What is your signal strength on the router and what does it say you are connected at?

Alright, moved the router from the other room (between a few walls, same floor) to sitting directly next to the PC. DL speed improved slightly, but still not even 350mbps - http://www.dslreports.com/speedtest/914976

Desktop is 10.0.0.10, laptop is 10.0.0.14.

No reboot should be needed the card resets itself and drops the wifi....At least here it does when you click ok.

You might want to get the other 2 off of the 5 ghz and see if you are at 702meg

(Last edited by northbound on 21 Jul 2015, 22:33)

looking at the rx rate for .10 vs .14 there's something wrong with the connection to .14

this being windows, and you've tried other things, try rebooting.

Is it just your wan that is slow? How fast can you go on your lan>lan

Exactly.. I was going to suggest transferring a file on the LAN.

I've tested this with only the desktop connected to the network and nothing changes.

Thing is, the reported rx/tx rate changes almost every few seconds. I mean, look at it now:

Haven't specifically tested LAN>LAN since WAN should be fast enough (it is via ethernet). Any ideas on how to best test LAN>LAN speed?

Copying a 32GB file off the USB3 HDD attached to the router averages around 16-19 MB/s (128-152mbps). The USB3 HDD is 1.5TB mechanical, and is EXT4.

(Last edited by iwrotecode on 21 Jul 2015, 23:25)

I need to take back what I said on ftp. On RC3 multiple file transfers bomb at 3 gig.
Here is a clip of the log.
Tue Jul 21 17:51:24 2015 kern.err kernel: [75896.697731] ieee80211 phy1: no memory
Tue Jul 21 17:51:24 2015 kern.err kernel: [75896.701458] ieee80211 phy1: no memory

There were 60 of these. Maybe this has to do with ntfs and its overhead. My flash is ext4 but it is only 2 gig and that does not bomb.

Do a share on your usb3 drive and copy it to a different computer on the 5ghz but you want to limit 5ghz to just 2 on the router if you can. You are getting too many variables happening  also looks like 10.0.0.10 is the only one where it should be connection wise. See if you can get 2 at the same stabilized rates use them for the lan>lan transfer

That reported speed changes very frequently. I moved from the desktop (.10) to the laptop (.14) and look at it now.

Didn't touch the laptop for 10 seconds and the rx rate dropped to 36Mbit/s. Not sure how to read the fluctuations.

20/40 - auto
40mHz - no/disabled
802.11h+d - default
preamble - short
Antenna diversity - (values?)
compatibility - no/disabled
roam - 3/medium
band - 5.2gHz
capability - 40 (unless it lists 80) or vht
beamforming - enabled or implicit and explicit
BT Collab - yes/enabled
BSS - preferably disabled, otherwise b/g
BT-AMP - yes/enabled
disable bands - b/g (unless you still have devices that use g on the network)
disable upon - no/disabled
fragmentation - try 9kb jumbo frames, however you may have to stay within the 1492 - 1500 mtu range depending what the option allows
IBBS 54g - no/disable
IBBS Mode - g
local MAC - blank (used to assign a custom MAC Address)
minimum power - no/disable
mixed cell - (values?)
power - 5/maximum
priority/vlan - disabled (utilized in complex qos)
rate a - blank
rate b/g - blank
roam tendency - medium/default (unless there's significant noise, then aggressive/10db)
roam decision - optimize bandwidth (unless far from AP and poor signal, then optimize distance)
RTS - default
Short GI - (values?)
WMM - enabled
WZC - 6 (or whatever channel you have set for 2.4gHz - you can try the 5.2gHz channel of 157, but it probably won't allow anything over 11)
XPress - enabled

This provides a decent explanation for most of the options

(Last edited by JW0914 on 22 Jul 2015, 00:04)

The rates are supposed to fluctuate when not transferring data, as otherwise it's wasting power.

As far as fluctuations when transferring, I assume this is normal as well (it occurs even when I transfer data).

(Last edited by JW0914 on 22 Jul 2015, 00:10)

Changed the below settings (or noted the differences between my settings and your post):

• Only options for 802.11h+d are "Loose 11h" or "Strict 11h" - default is "Loose 11h"

• Only options for 802.11n Preable are "Auto" or "Mixed" - default is "Auto"

• Only options for Antenna Diversity are "Auto" "Aux" or "Main" - default is "Auto"

• Only options for AP Compatibility Mode are "Higher Performance" or "Broader Compatibility" - default is "Higher Performance"

• Only options for Association Roam Preference are "Disabled" or "Enabled" - default is "Disabled"

• Only options for Band Preference are "None", "Prefer 802.11a" or "Prefer 802.11b/g" - default is "None"

• Only options for Bandwidth Capability are "11a/b/g:20/40MHz", "11a/b/g:20MHz" or "11a:20/40;11bg:20MHz" - default was "11a:20/40;11bg:20MHz", changed to "11a/b/g:20/40MHz"

• Only options for BSS PLCP Header are "Auto (Short/Long)" or "Long" - default is "Auto (Short/Long)"

• Default option for Fragmentation Threshold is 2346. The ATT gateway shows 1500 MTU - should I change this to 1500?

• Disabled IBSS 54g(tm) Protection Mode - default was "Auto"

• Only options for IBSS Mode are "802.11a/b Only", "802.11a/b/g Auto", "802.11a/b/g Performance" or "802.11a/b/g/n Auto" - which should I change it to?

• Only options for Mixed Cell Support are "Enabled" or "Disabled" - default is "Disabled"

• Only options for Rate (802.11a) are "6", "9", "12", "18", "24", "36", "48", "54" or "Best Rate" - default is "Best Rate"

• Only options for Rate (802.11b/g) are "1", "2", "5.5", "6", "9", "11", "12", "18", "24", "36", "48", "54" or "Best Rate" - default is "Best Rate"

• Only options for Roam Tendency are "Aggressive", "Auto", "Conservative" or "Moderate" - default is "Auto"

• Roaming Decision changed to "Optimize Bandwidth" - default was "Auto"

• RST Threshold default is 2347 - did not change (can be set to seemingly any integer)

• Only options for Short GI are "Auto" or "Disabled" - default is "Auto"

• WMM changed from "Auto" to "Enabled"

• WZC IBSS Channel Number changed from "11(20MHz)" to "157(40MHz-L)" - I assume that was the better choice over the option "157(20MHz), although there are 80MHz options available, highest channel with 80MHz being 149(80MHz)

• Enabled Xpress (TM) Technology - default was "Disabled"

Back to trunk. usb3 ntfs in router using ftp I was almost to 5.5 gig before bomb. Over 100 of these.

Tue Jul 21 20:11:02 2015 kern.err kernel: [ 2271.966474] ieee80211 phy1: no memory

ftp client restarted itself automatically and the download finished for a total of 6.2 gig running at 240 meg router about 24 meg disk.
The new factory firmware maintained  422m on wireless about 46m disk until my laptops HD was saturated then maintained 40 meg until the same transfer was finished no errors. I hope OpenWrt can get there. I do like the ava. features

Changes are in bold:

20/40 - auto
40mHz - no/disabled
802.11h+d - Loose
preamble - Auto
Antenna diversity - Auto
compatibility -  High Performance
roam - Disabled
band - 802.11a (Unless you have devices on your network that utilize g)
capability  - 11a:20/40;11bg:20MHz
beamforming - enabled or implicit and explicit
BT Collab - yes/enabled
BSS - Auto (if you ever have the capability, it should always be set to short, as long is for 802.11b)
BT-AMP - yes/enabled
disable bands - b/g (unless you still have devices that use g on the network)
disable upon - no/disabled

fragmentation - try 9kb jumbo frames, however you may have to stay within the 1492 - 1500 mtu range depending what the option allows

• Default option for Fragmentation Threshold is 2346. The ATT gateway shows 1500 MTU - should I change this to 1500?

No, don't change it to 1500.  I thought this might refer to the use of jumbo frames, but it doesn't. You can change it, but it needs to be a change separate from other changes, as you'll have to change it, check speed, tweak, check speed, and so on.  It's a trial and error tweak and requires time to do.

IBBS 54g - no/disable
IBBS Mode - 802.11a/b/g Performance (If throughput seems degraded, try 802.11a/b/g/n Auto)
local MAC - blank (used to assign a custom MAC Address)
minimum power - no/disable
mixed cell - (values?)
power - 5/maximum
priority/vlan - disabled (utilized in complex qos)
rate a - Best Rate
rate b/g - Best Rate
roam tendency - Moderate (unless there's significant noise, then Aggressive)
roam decision - optimize bandwidth (unless far from AP and poor signal, then optimize distance)
RTS - default (fragmentation note also applies to this)
Short GI - Auto (I have no clue what this is, so best leave it set to default until you find out)
WMM - enabled

WZC - 6 (or whatever channel you have set for 2.4gHz - you can try the 5.2gHz channel of 157, but it probably won't allow anything over 11)

• [*WZC IBSS Channel Number changed from "11(20MHz)" to "157(40MHz-L)" - I assume that was the better choice over the option "157(20MHz), although there are 80MHz options available, highest channel with 80MHz being 149(80MHz)

Since it actually assigns channel numbers to the channel widths, I would try 157 (40mHz-L) and see what your speeds are, then try 149 (80mHz) with your router also set to 149 and see if there's better throughput.

XPress- enabled

(Last edited by JW0914 on 22 Jul 2015, 02:15)

When it comes to the driver settings in Ubuntu, Chrome OS, or other *nix OSes, I have no clue.  However, when I was searching earlier for explanations of what some of the options were, I came across a lot of threads for *nix OSes.  You may have to spend a bit of time reading, but there are a decent number of threads for the BCM4352's settings

(Last edited by JW0914 on 22 Jul 2015, 02:09)

Made the changes, left on channel 157.
Speed test after PC and router reboot - http://www.dslreports.com/speedtest/917186

Swapped to 149(80MHz) on PC and changed router channel to 149.
Speed test after router reboot - http://www.dslreports.com/speedtest/917250

No dice with the speed. You sure that I should be getting faster speed on a 2x2 stream? Theoretical vs. actual throughput is quite different generally (referring to your 867mbps comments earlier).

Intel 7620AC* for the Chromebook. I unfortunately can't change the network settings in Ubuntu since it's a chroot (https://github.com/dnschneid/crouton).

On your LAN, I'm 100%.  On the WAN, I would assume so, but have never had ISP speed above 65mbps (fiber hasn't yet made it to WI, or at least the part I live in lol)  Looking at your screenshots from earlier, you're getting the speed range you should be getting on LAN (702 - 867mbps is normal for AC, albeit 702 is slightly on the low side, since it should normally reside above 720). 

Looking at it from a purely logical standpoint, if you're getting the correct AC speeds on LAN and getting the correct ISP speeds over ethernet, but not on WLAN, then it would appear to be an issue (I use "issue" lightly, meaning something as simple as a minor tweak or an actual issue) with the WLAN drivers.... again, this is from a purely logical outlook, as I have no experience with the WLAN drivers.

(Last edited by JW0914 on 22 Jul 2015, 03:52)