fidzu : debian

National Knowledge Network (NKN) is one of India's main National Research and Educational Network (NREN). The other being the less prevalent Education and Research Network (ERNET).

This post grew out of this Mastodon thread where I kept on adding various public graphs (from various global research and educational entities) that peer or connect with NKN. This was to get some purview about traffic data between them and NKN.

CERN

CERN, birthplace of the World Wide Web (WWW) and home of the Large Hadron Collider (LHC).

• Graph - https://monit-grafana-open.cern.ch/d/XoND3VQ4k/nkn?orgId=16&from=now-30d&to=now&timezone=browser&var-source=raw&var-bin=5m
• Connection seems to be 2x10 G through CERNLight.

India participates in the LHCONE project, which carries LHC data over these links for scientific research purposes. This presentation from Vikas Singhal from Variable Energy Cyclotron Centre (VECC), Kolkata, at the 8th Asian Tier Center Forum in 2024 gives some details.

GÉANT

GÉANT is pan European Union's collaboration of NRENs.

• Graph https://public-brian.geant.org/d/ZyVgYFgVk/nkn?orgId=5&from=now-30d&to=now
• NKN connects at Amsterdam POP.
• From the 2016 press release from GÉANT, NKN seems to have 2x10 G capacity towards GÉANT. Things might have changed since.

LEARN

Lanka Education and Research Network (LEARN) is Sri Lanka's NREN.

• Graph https://kirigal.learn.ac.lk/traffic/details.php?desc=slt-b1-new&data_id=1788&data_id_v6=&sub_bw=1000&name=National%20Knowledge%20Network%20of%20India%20(1G)&swap_inout=
• Connection seems to be 1 G.

NORDUnet

NREN for Nordic countries.

• Graph https://stats.nordu.net/stat-q/r-all?q=all&name=NKN

I couldn't find any public live data transfer graphs from NKN side. If you know any other graphs, do let me know.

25 Feb 2026 1:38pm GMT

Our Debian User Group met on February 22^nd for our first meeting of the year!

Here's what we did:

pollo:

• reviewed and merged Lintian contributions:
  • salsa MR !664
  • salsa MR !665
  • salsa MR !666
• released lintian version 2.130.0
• upstreamed a patch for python-wilderness, fixed a few things and released version 0.1.10-3
• updated python-clevercsv to version 0.8.4
• updated python-mediafile to version 0.14.0

lelutin:

• opened up a RFH for co-maintenance for smokeping and added Marc Haber who responded really quickly to the call
• with mjeanson's help: prepped and uploaded a new smokeping version to release pending work
• opened a NM request to become DM

viashimo:

• fixed freshrss timer
• updated freshrss
• installed new navidrome container
• configured backups for new host (beelink mini s12)

tvaz:

• did NM work
• learned more about debusine and tested it
• uploaded antimony to debusine
• (co-)convinced lelutin to apply for DM (yay!)

lavamind:

• worked on autopkgtests for a new version of jruby

Pictures

This time around, we held our meeting at cégep du Vieux Montréal, the college where I currently work. Here is the view we had:

We also ordered some delicious pizzas from Pizzeria dei Compari, a nice pizzeria on Saint-Denis street that's been there forever.

Some of us ended up grabbing a drink after the event at l'Amère à boire, a pub right next to the venue, but I didn't take any pictures.

24 Feb 2026 9:45pm GMT

I just made up a Debian trixie setup that has no need for a GUI. In fact, I rarely use the text console either. However, because the machine is dual boot and also serves another purpose, it's connected to my main monitor and KVM switch.

The monitor has three inputs, and when whatever display it's set to goes into powersave mode, it will seek out another one that's active and automatically switch to it.

You can probably see where this is heading: it's really inconvenient if one of the inputs never goes into powersave mode. And, of course, it wastes energy.

I have concluded that the Linux text console has lost the ability to enter powersave mode after an inactivity timeout. It can still do screen blanking - setting every pixel to black - but that is a distinct and much less useful thing.

You can do a lot of searching online that will tell you what to do. Almost all of it is wrong these days. For instance, none of these work:

• Anything involving vbetool. This is really, really old advice.
• Anything involving xset, unless you're actually running a GUI, which is not the point of this post.
• Anything involving setterm or the kernel parameters video=DPMS or consoleblank.
• Anything involving writing to paths under /sys, such as ones ending in dpms.

Why is this?

Well, we are on at least the third generation of Linux text console display subsystems. (Maybe more than 3, depending on how you count.) The three major ones were:

1. The VGA text console
2. fbdev
3. DRI/KMS

As I mentioned recently in my post about running an accurate 80×25 DOS-style console on modern Linux, the VGA text console mode is pretty much gone these days. It relied on hardware rendering of the text fonts, and that capability simply isn't present on systems that aren't PCs - or even on PCs that are UEFI, which is most of them now.

fbdev, or a framebuffer console under earlier names, has been in Linux since the late 1990s. It was the default for most distros until more recently. It supported DPMS powersave modes, and most of the instructions you will find online reference it.

Nowadays, the DRI/KMS system is used for graphics. Unfortunately, it is targeted mainly at X11 and Wayland. It is also used for the text console, but things like DPMS-enabled timeouts were never implemented there.

You can find some manual workarounds - for instance, using ddcutil or similar for an external monitor, or adjusting the backlight files under /sys on a laptop. But these have a number of flaws - making unwanted brightness adjustments, and not automatically waking up on keypress among them.

My workaround

I finally gave up and ran apt-get install xdm. Then in /etc/X11/xdm/Xsetup, I added one line:

xset dpms 0 0 120

Now the system boots into an xdm login screen, and shuts down the screen after 2 minutes of inactivity. On the rare occasion where I want a text console from it, I can switch to it and it won't have a timeout, but I can live with that.

Thus, quite hopefully, concludes my series of way too much information about the Linux text console!

24 Feb 2026 2:22pm GMT