R7000: Sep Builds + Plex = Streaming Dropouts

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aerogems
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Joined: 25 Sep 2020
Posts: 7

PostPosted: Fri Sep 25, 2020 21:12    Post subject: R7000: Sep Builds + Plex = Streaming Dropouts Reply with quote
Maybe someone can help me figure out what's going on with my R7000 and any of the September builds.

I switched over from Tomato to the 8/15/20 build, the newest at the time, and everything has been working great. I decide to try to update to one of the September builds and that's when I start having issues. Doesn't matter if it's the 9/10, 9/18, or 9/24 build, the issue is the same.

I try to stream a TV show from my local Plex server and after 25-30 minutes, give or take, the streaming just stops. It doesn't freeze or stutter, it's like it reaches the end of the file or I hit the stop button. After the first time it happens it will continue happening at seemingly random intervals. Most recently I had it happen the first time after about 30 minutes, then it happened at least two more times within the next six minutes of the episode in question.

My Plex server is running on my Synology NAS, which is wired directly to the R7000. I am using a Shield TV (2019) sitting maybe 6-9ft away from the router connected via 802.11ac. The issue has happened with multiple files, all 1080p with AC3 stereo audio. About 1GB/file give or take maybe 100MB.

I have restarted the wifi on the Shield, I have rebooted the Shield, I have rebooted the router, I have reset the router to factory defaults and then manually changed all the settings back to the way they were, no change.

I am reasonably certain the issue has to do with some change made in the DD-WRT code since the 8/15/20 build because that one continues to work flawlessly and I can simply flash back to that build and everything works fine. Also, as I stated, I tried doing a factory reset with the 9/24 build and then manually put in all the settings, so it's not a stale setting.

The only oddity, is that I use PlexKodiConnect with Kodi to stream content from my Plex server. However, as stated the 8/15 build works flawlessly with this exact setup, so I am disinclined to think it has any bearing.

Happy to provide any info about settings I have changed, network topology, etc.
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egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 6243
Location: Netherlands

PostPosted: Sat Sep 26, 2020 8:42    Post subject: Reply with quote
If I read you post correctly it is while streaming over 5 GHz.

As a test use 2.4 GHz.

Check you 5 GHz settings.
Do not use auto channel, use AC/N, Regulatory domain US, do not use fancy stuff leave everything else at default

https://wiki.dd-wrt.com/wiki/index.php/Basic_Wireless_Settings

https://wiki.dd-wrt.com/wiki/index.php/Advanced_wireless_settings

_________________
Routers:Netgear R7800, R6400v1, R6400v2, Linksys EA8500, EA6900 (XvortexCFE), E2000 (converted WRT320N), WRT54GS v1.
OpenVPN Policy Based Routing guide: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=321686
Install guide R6400v2:http://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
OpenVPN Server Setup:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=318795
Install guide R7800: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Wireguard Server setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1183135
Wireguard Client setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324624
Wireguard Advanced setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324787
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
aerogems
DD-WRT Novice


Joined: 25 Sep 2020
Posts: 7

PostPosted: Sat Sep 26, 2020 15:24    Post subject: Reply with quote
Tried 2.4GHz and it's significantly worse.

Went back to the 9/24 build, and set 2.4GHz to NG-Only and a channel that wasn't being used. Then set 5GHz to AC/N-Only and set it to a channel not being used according to the site survey function. Turned off the beamforming which was really the only "extra" thing I turned on.

Connected my Shield to the 2.4GHz network and tried to play some of the files I've had issues with. Twice in a row it stopped after maybe 1-2 seconds of playback. Then it worked for a little bit, I left to use the bathroom, and by the time I came back it had crapped out.

And once again, even with the beamforming enabled, the 8/15 build works flawlessly, even if I set the channel selection to Auto and modes both to Mixed.
egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 6243
Location: Netherlands

PostPosted: Sat Sep 26, 2020 15:36    Post subject: Reply with quote
If you have a specific build number (the last one working correctly) I can have a look at the changes in source code
_________________
Routers:Netgear R7800, R6400v1, R6400v2, Linksys EA8500, EA6900 (XvortexCFE), E2000 (converted WRT320N), WRT54GS v1.
OpenVPN Policy Based Routing guide: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=321686
Install guide R6400v2:http://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
OpenVPN Server Setup:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=318795
Install guide R7800: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Wireguard Server setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1183135
Wireguard Client setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324624
Wireguard Advanced setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324787
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
aerogems
DD-WRT Novice


Joined: 25 Sep 2020
Posts: 7

PostPosted: Sat Sep 26, 2020 15:42    Post subject: Reply with quote
Firmware: DD-WRT v3.0-r44191 std (08/15/20) is the one that works perfectly. I haven't tried any of the later August builds, so I'll give the r44251 build from 8/28 a try and maybe work my way backwards from there.
egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 6243
Location: Netherlands

PostPosted: Sat Sep 26, 2020 15:48    Post subject: Reply with quote
When it is happening check syslog for any errors and post syslog if you see any errors
_________________
Routers:Netgear R7800, R6400v1, R6400v2, Linksys EA8500, EA6900 (XvortexCFE), E2000 (converted WRT320N), WRT54GS v1.
OpenVPN Policy Based Routing guide: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=321686
Install guide R6400v2:http://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
OpenVPN Server Setup:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=318795
Install guide R7800: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Wireguard Server setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1183135
Wireguard Client setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324624
Wireguard Advanced setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324787
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
aerogems
DD-WRT Novice


Joined: 25 Sep 2020
Posts: 7

PostPosted: Sat Sep 26, 2020 18:37    Post subject: Reply with quote
I will keep testing, but it seems like there was some change between r44251 from 8/27/20 and r44340 from 9/10/20 that is causing the issue. I made it through an entire 43 minute episode using r44251 which I don't believe I've been able to do with any of the builds from r44340 onward.
aerogems
DD-WRT Novice


Joined: 25 Sep 2020
Posts: 7

PostPosted: Sat Sep 26, 2020 23:01    Post subject: Reply with quote
Reinstalled r44467 and the only red lines I see around the time it errored out are the below. I cut out the IP and MAC Addresses, but left everything else as-is.

Sep 27 00:42:15 DD-WRT daemon.err httpd[1941]: httpd : Request Error Code 400: Cross Site Action detected!
Sep 27 00:42:17 DD-WRT daemon.err httpd[1941]: httpd : Request Error Code 400: Cross Site Action detected!
Sep 27 00:42:25 DD-WRT daemon.err httpd[1941]: httpd : Request Error Code 408: Unexpected connection close in intitial request
Sep 27 00:42:28 DD-WRT daemon.info dnsmasq-dhcp[1756]: DHCPREQUEST(br0) <snip>
Sep 27 00:42:28 DD-WRT daemon.info dnsmasq-dhcp[1756]: DHCPACK(br0) <snip> LGwebOSTV
Sep 27 00:43:39 DD-WRT daemon.err httpd[1941]: httpd : Request Error Code 408: Unexpected connection close in intitial request
Sep 27 00:43:39 DD-WRT daemon.err httpd[1941]: httpd : Request Error Code 408: Unexpected connection close in intitial request

Edit: It just dropped out again, and after maybe a minute this appeared in the syslog

Sep 27 01:10:19 DD-WRT daemon.err httpd[1941]: httpd : Request Error Code 408: No request appeared within a reasonable time period.
egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 6243
Location: Netherlands

PostPosted: Sun Sep 27, 2020 8:37    Post subject: Reply with quote
That is from the httpd damon the webserver of the router which is what we call the GUI, so basically you browsing the router.
It could be a plug in in your browser, Chromium based browsers do no always play nice with DDWRT.

Use Firefox without any plug in

So I do not think this is related to your problem.

If you could stream wired that could rule out a lot of things, meaning then it is a wireless problem.

Also take a look at the wireless status page to see if your Rx/Tx errors are high/increasing

_________________
Routers:Netgear R7800, R6400v1, R6400v2, Linksys EA8500, EA6900 (XvortexCFE), E2000 (converted WRT320N), WRT54GS v1.
OpenVPN Policy Based Routing guide: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=321686
Install guide R6400v2:http://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
OpenVPN Server Setup:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=318795
Install guide R7800: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Wireguard Server setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1183135
Wireguard Client setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324624
Wireguard Advanced setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324787
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
aerogems
DD-WRT Novice


Joined: 25 Sep 2020
Posts: 7

PostPosted: Sun Sep 27, 2020 13:31    Post subject: Reply with quote
I have been using IE11 for DD-WRT configuration. It's completely stock, except I changed the home page to the DD-WRT status page because DD-WRT is the one and only thing I use IE11 for.

And running a cable would be difficult. I broke my ankle about a week ago and getting down to plug something into the router and then running it behind some other furniture just isn't going to happen for a few weeks.

The Rx/Tx errors are always hover in the single digits.

There is also how the August builds work fine, but the September builds are the ones that are problematic. The obvious conclusion is there was some change to the wireless subsystem between the r44251 and r44340 builds that's causing the problem.
wabe
DD-WRT Guru


Joined: 17 Jun 2006
Posts: 764

PostPosted: Tue Sep 29, 2020 8:21    Post subject: Reply with quote
I'm on 44340 (Asus RT-AC68U) and use Plex. Streaming over Chromecast connected to my 2.4 GHz wifi. Works quite well and I haven't noticed any problems recently.
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