Voxel Custom firmware build for R7800 v. 1.0.2.82SF & v. 1.0.2.82.1SF & v. 1.0.2.82.2SF

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Voxel

Part of the Furniture
Just FYI:

1613766455255.png


This folder contains my intermediate internal snapshot releases not published
officially (SNB or other forums). For people who wish to have up-to-date version.
Something like "beta".

The log is inside ZIP archive.

Voxel.
 

RainGater96

Regular Contributor
I had configured SSH before and haven't been using R7800 for a while. Today, I plugged in and flashed your new version and it's working great and thank you for your wonderful work.

When I tried to connect to the router using SSH, I get the dreaded "Permission denied (publickey)" error.

I am connecting to the router from Windows and I have both the files in the correct location. Any ideas what could be the issue? TIA.

"C:\Users\xxx\.ssh\id_rsa"
"C:\Users\xxx\.ssh\id_rsa.pub"

EDIT: Figured it out. I don't know what happened to /root/.ssh/authorized_keys as it was there before when I was using R7800. When I flashed your new version, the file went missing or I am not sure what happened to the file. Anyways, I recreated acuthorized_keys and it's all good.
 
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RainGater96

Regular Contributor
E.g. part of my /mnt/sda1/autorun/scripts/post-mount.sh:

Code:
#!/bin/sh
. . .
# Autorestore from backup if flashing new firmware is detected
if [ ! -f /root/.ssh/authorized_keys ]; then
    cd /
    tar xf /mnt/optware/backup/root.tar
    echo "Flashing new firmware is detected. Restore settings from archive." > /tmp/autorun.log
fi

I.e. it is better to make a backup storing whole /root directory (once) and to provide "autorestore" as in example above.
I have an USB drive on R7800 and how do I get your autorun script to run after a new firmware update? I haven't installed any addons, just the firmware only.

I want to extract the /root folder after a new firmware update.

Would adding the code (to copy it to /root) in /etc/rc.local work? Does it survive firmware updates? Thanks.

Code:
[email protected]:/tmp/mnt/sda/root$ df
Filesystem           1k-blocks      Used Available Use% Mounted on
tmpfs                      512         0       512   0% /dev
ubi0:overlay_volume      51032      9240     39148  19% /overlay
overlayfs:/overlay       51032      9240     39148  19% /
/dev/sda               3916288       164   3916124   0% /tmp/mnt/sda
 
Last edited:

Voxel

Part of the Furniture
Interesting... How could you get this re: /tmp/mnt/sda but not /tmp/mnt/sda1...

Seems, you have to reformat your USB and with ext4 FS. First, fdisk when USB is unmounted:

Code:
umount -l /mnt/sda
fdisk /dev/sda

delete all partitions on your USB and create the primary partition. fdisk contains some help ("Command (m for help):").

After that you should see as /dev/sda as /dev/sda1

Code:
ls -l /dev/sda*


and after that:

Code:
mkfs.ext4 -L optware -O ^64bit /dev/sda1
tune2fs -O ^metadata_csum /dev/sda1
reboot

and if you create after reboot /mnt/sda1/autorun/scripts/post-mount.sh file and it will be executable ('chmod +x /mnt/sda1/autorun/scripts/post-mount.sh') it will be executed every time after you reboot your router.

And: add autorestore of your /root/.ssh (but not /mnt/sda/root/.ssh).

Voxel.
 

RainGater96

Regular Contributor
Interesting... How could you get this re: /tmp/mnt/sda but not /tmp/mnt/sda1...

Seems, you have to reformat your USB and with ext4 FS. First, fdisk when USB is unmounted:

Code:
umount -l /mnt/sda
fdisk /dev/sda

delete all partitions on your USB and create the primary partition. fdisk contains some help ("Command (m for help):").

After that you should see as /dev/sda as /dev/sda1

Code:
ls -l /dev/sda*


and after that:

Code:
mkfs.ext4 -L optware -O ^64bit /dev/sda1
tune2fs -O ^metadata_csum /dev/sda1
reboot

and if you create after reboot /mnt/sda1/autorun/scripts/post-mount.sh file and it will be executable ('chmod +x /mnt/sda1/autorun/scripts/post-mount.sh') it will be executed every time after you reboot your router.

And: add autorestore of your /root/.ssh (but not /mnt/sda/root/.ssh).

Voxel.
Thank you so much and appreciate your quick response.

Couple of more questions:

1. I unchecked the PIN for WPS in Advanced->Advanced Setup->Wireless Settings->WPS Settings->Router PIN. Is it all needed or how do I disable WPS completely?

2. In your README, I see that you have mentioned this: "manually remove ReadyCLOUD and Kwilt installations (several reboots might be needed)". I already set the NVRAM variables as you described but how to manually remove ReadyCLOUD and Kwilt?

Thank you in advance for your work and much appreciate it.
 

Voxel

Part of the Furniture
1. I unchecked the PIN for WPS in Advanced->Advanced Setup->Wireless Settings->WPS Settings->Router PIN. Is it all needed or how do I disable WPS completely?
Please check this thread:



2. In your README, I see that you have mentioned this: "manually remove ReadyCLOUD and Kwilt installations (several reboots might be needed)". I already set the NVRAM variables as you described but how to manually remove ReadyCLOUD and Kwilt?
If you do not use Entware:

Code:
rm -rf /opt
rm -rf /hipplay
reboot

Voxel.
 

RainGater96

Regular Contributor
Please check this thread:

Thanks again for the response.

Actually, I serached for disabling WPS and came across that thread. But, there was no solution in it other unchecking the PIN. I read somewhere in this thread that you disabled WPS, so I was curious of how you did it.

1613858550408.png


I unchecked the "Keep Existing Wireless Settings" and it keeps getting enabled and not sure what is that for.

Btw, the web interface is so 1990s with frames inside frames. Never thought, in 2021, I will work on an interface as clumsy as it is but that's Netgear's problem.
 
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RainGater96

Regular Contributor
I switched to my ASUS RT-AC87R to test the load and it dropped significantly. Whoa, Netgear has lots of work to do to fix it.

Code:
RT-AC87R:
   [email protected]:/tmp/home/root# uptime
    13:22:58 up  5:30,  load average: 0.13, 0.13, 0.12

R7800:
   [email protected]:~$ uptime
    11:17:35 up  7:47, load average: 4.00, 4.01, 4.04
 

RainGater96

Regular Contributor
Hello,
What did you do to load the CPU?
Just the usual streaming/browsing from few devices, maybe around 6 - 8.

There is a bug in Netgear firmware and there are posts that mention about this *load* bug. Here is the post:

 

RainGater96

Regular Contributor
Mine has the same results too :
[email protected]:/$ uptime
22:14:05 up 7 days, 2:54, load average: 4.15, 4.05, 4.05

That's why it's a bit hot too, 52° almost all the time...
Yes, that's why I thought of switching the router to see whether anything is messed up in my network. Found out that it's Netgear firmware and others are having the same issue too.

Will let my R7800 sleep for a while until it's fixed. ASUS is back in biz now. LOL.
 

R. Gerrits

Senior Member
The bug is not that the R7800 is using a lot of CPU.
The bug is only that the netgear kernel is calculating the load in a wrong way.

If you'd check the cpu usage with for instance mpstat -P ALL 1 1 then you'll probably see a high idle %

Also a temperature of 52 celcius is pretty oke in my opinion. (also considering that it doesn't have CPU fan)
Mine is usually running above 56c.
And if I really push the cpu load, then it will reach 70c
 

NetBytes

Regular Contributor
The bug is not that the R7800 is using a lot of CPU.
The bug is only that the netgear kernel is calculating the load in a wrong way.

If you'd check the cpu usage with for instance mpstat -P ALL 1 1 then you'll probably see a high idle %

Also a temperature of 52 celcius is pretty oke in my opinion. (also considering that it doesn't have CPU fan)
Mine is usually running above 56c.
And if I really push the cpu load, then it will reach 70c
FWIW: I placed a usb powered dual fan laptop cooler underneath my R7800 and the temp never gets that high anymore.
 

HELLO_wORLD

Very Senior Member
FWIW: I placed a usb powered dual fan laptop cooler underneath my R7800 and the temp never gets that high anymore.
I second that.
After my first R7800 (still pretty new) got a fried nvram chip, I got one of those for the second (RMA exchanged) one. Temps are way lower.
 

LeKeiser

Regular Contributor
I also use a usb powered dual fan laptop cooler underneath my R7800, but 1) it's a little noisy and my 7800 is in my bedroom, and 2) the temp never goes lower than 51°C, the room temperature is around 19°C at best.
 

HELLO_wORLD

Very Senior Member
I also use a usb powered dual fan laptop cooler underneath my R7800, but 1) it's a little noisy and my 7800 is in my bedroom, and 2) the temp never goes lower than 51°C, the room temperature is around 19°C at best.
I suppose some coolers are more efficient than others.
Mine is very quiet (but in the entryway so don’t know how it would feel in a silent bedroom). And temps (room is 21°C):
Code:
[email protected]:~$ cat /sys/devices/virtual/thermal/thermal_zone*/temp
43
42
40
40
39
40
42
40
43
39
41
[email protected]:~$
 

LeKeiser

Regular Contributor
I've tried many coolers, and the one I kept is relatively quiet. But there is still a little huming but I can live with that :)

The temps you are showing, aren't they from the Asus router?

Mine are :
[email protected]:/sys/devices/virtual/thermal$ cat thermal_zone*/temp
50
49
49
48
49
48
48
48
49
46
50

But my cooler is not on yet. It's still February, Spring is coming but not yet :D
 

HELLO_wORLD

Very Senior Member
I've tried many coolers, and the one I kept is relatively quiet. But there is still a little huming but I can live with that :)

The temps you are showing, aren't they from the Asus router?

Mine are :
[email protected]:/sys/devices/virtual/thermal$ cat thermal_zone*/temp
50
49
49
48
49
48
48
48
49
46
50

But my cooler is not on yet. It's still February, Spring is coming but not yet :D
R7800

I don’t have an Asus.

My cooler is on all the time.
 

RMinNJ

Regular Contributor
I have mine simply sitting on 2 old tv remote controls to give it air flow underneath. My cable modem is similar ..raised on 4 legs of lego blocks. Not saying its some crazy cooling but it can't hurt.
 

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