Release RT-AC86U 11th January 2021 Firmware version 3.0.0.4.386.41634

[jozsiszfvar]

Yes. But you will need a USB drive of some sort inserted to trigger the process. (There may be another way, too)

Enable SSH access LAN only.
In a terminal (Putty is great for this) log into your router
You will use the VI editor to create a file and enter contents

vi /jffs/post-mount (Enter)

Enter insert mode by pressing i then Enter

#!/bin/sh
pwr config --wait on

Then type :wq to save and exit VI

Set permissions in the file

chmod 755 /jffs/post-mount

Next enter the NVRAM edit

nvram set script_usbmount="/jffs/post-mount"

nvram commit

That's it. When you insert a USB drive the post-mount script will run. This was originally intended to mount a swap file which may be a good idea if you use Samba.

To make a swap file on a thumb drive

Run these commands to make a 512 MB swap file on the USB drive labeled 32GB (Use the label of your thumb drive)

dd if=/dev/zero of=/tmp/mnt/32GB/myswap.swp bs=1k count=524288

mkswap /tmp/mnt/32GB/myswap.swp

swapon /tmp/mnt/32GB/myswap.swp

Then the post-mount file contents will look like

#!/bin/sh
swapon /tmp/mnt/32GB/myswap.swp
pwr config --cpuwait on

Thanks for working. Another way without USB?

 

[bbunge]

Thanks for working. Another way without USB?

I do not think so. I had other issues and went back to the rock solid Merlin 384.19.

 

[Jbennett360]

So, do we install or do we avoid?

 

[OzarkEdge]

So, do we install or do we avoid?

Install it and send me $150 for managing your network.

OE

 

[alex1236hk]

https://www.ti.com/lit/an/sprabx4b/sprabx4b.pdf

Go to Hell ASUS

oh my lord, someone even did a study about that?!

 

[quadra2030]

Texas Instruments should know about it very well - they invented first integrated circuit, TTL logic 74xx series, etc.. and supplied military applications (like semiconductors in rocket guidance systems) for 60 years.

 

[bbunge]

So, do we install or do we avoid?

If you are using Asus firmware you may not have a choice. It may upgrade itself (still waiting on reports to see if it does upgrade).
I'm cheaper than OE. Just send me $50.00. Or a new RT-AX68U when they come out.

 

[DarkKnight75]

If you are using Asus firmware you may not have a choice. It may upgrade itself (still waiting on reports to see if it does upgrade).
I'm cheaper than OE. Just send me $50.00. Or a new RT-AX68U when they come out.

Mine hasn't auto updated to the latest .386 version. Still on .384

 

[OzarkEdge]

Texas Instruments should know about it very well - they invented first integrated circuit, TTL logic 74xx series, etc.. and supplied military applications (like semiconductors in rocket guidance systems) for 60 years.

As I read it, my router with CPU wait disabled will last far longer than I will ever want to keep it.

OE

 

[RMerlin]

Texas Instruments should know about it very well - they invented first integrated circuit, TTL logic 74xx series, etc.. and supplied military applications (like semiconductors in rocket guidance systems) for 60 years.

Not every chip is manufactured using the same process. For a very radical example, back in the day, logic gates could be TTL-based, or CMOS-based. TTL gates were far more resilient to voltage swings, however CMOS were more fragile, and more prone to get killed by electrostatic discharges.

Therefore, that study of TI's chip cannot be applied in any way to Broadcom's CPUs. The max Tjunc for instance isn't even the same.

 

[follower]

Not every chip is manufactured using the same process. For a very radical example, back in the day, logic gates could be TTL-based, or CMOS-based. TTL gates were far more resilient to voltage swings, however CMOS were more fragile, and more prone to get killed by electrostatic discharges.

Therefore, that study of TI's chip cannot be applied in any way to Broadcom's CPUs. The max Tjunc for instance isn't even the same.

I don't think so.

 

[RMerlin]

I don't think so.

Believe what you want. But I actually have a degree in electronics, so I have a pretty good idea on how this stuff works.

 

[follower]

Believe what you want. But I actually have a degree in electronics, so I have a pretty good idea on how this stuff works.

The most important things are Materials. Does Broadcom make CPUs with some kind of alien materials and technology? Interesting. I think you just believe what you think. There are so many papers about it, like this paper. My professors are idiots if I follow your theory.

http://rsim.cs.uiuc.edu/Pubs/srinivasan_isca04.pdf

 

[L&LD]

I've had many professors who were idiots. I was young enough and smart enough to not let them know what I thought.

A title doesn't mean much. An IC designed for deep space, for example, would completely baffle you, I'm sure.

 

[RMerlin]

The most important things are Materials. Does Broadcom make CPUs with some kind of alien materials and technology? Interesting. I think you just believe what you think. There are so many papers about it, like this paper. My professors are idiots if I follow your theory.

http://rsim.cs.uiuc.edu/Pubs/srinivasan_isca04.pdf

It's not just about the materials. Other factors such as gate type, node density, voltage and current flowing through will make a difference. Some types of gates are more susceptible to electron migration than others.

This is why the max Tjunc isn't the same for every chips. Or why write endurance varies between different types of NANDs. The bcm4708, if I recall correctly, has a max Tjunc of around 120C. Meanwhile, a modern Intel CPU will have a max Tjunc of 105C.

So no, you cannot take the specs of a TI-designed CPU, and expect it to apply exactly as-is to a Broadcom-designed CPU. Different design, different node process, possibly different gate technology as well.

 

[Yota]

Believe what you want. But I actually have a degree in electronics, so I have a pretty good idea on how this stuff works.

wow, that's why Merlin firmware is so great. because we have you.

 

[quadra2030]

Believe what you want. But I actually have a degree in electronics, so I have a pretty good idea on how this stuff works.

You are not only one here with degree in electronics (or solid state physics), I think.. and while we can argue about manufacturing process of particular ICs/SoCs (and there are big differences as you wrote), the TI study is still valid in general.

I wouldn't still run such SoC as in RT-AC86U at 90-100 °C for long time, even if it has 120 °C Tjunc (nor would design such device in that way).

 

[RMerlin]

the TI study is still valid in general.

I never said it wasn't. Only that the parameters aren't the same across all chips.

 

[Jbennett360]

Install it and send me $150 for managing your network.

OE

Seems a little steep

 

[OzarkEdge]

Seems a little steep

I'm retired.

OE