Simon Ser @emersion@octodon.social

So, yeah, *&%*($ to silently ignoring errors, XCB.

It turns out sending a closed FD via XCB doesn't fail. The other side (X.Org server) just receives a random FD number, which I think by chance referred to an unrelated FD which was opened.

But why was I sending a closed FD via XCB in the first place? It turns out sending a FD via XCB also closes it. So it worked fine the first time, and caused the bug the second time.

This morning I spent a few hours tracking down a bug in wlroots' X11 backend. Importing a DMA-BUF via the X11 DRI3 extension failed, and I couldn't understand why.

Went from X.Org server core to Xwayland to GBM to Gallium to radeonsi to libdrm to the kernel. The FD seemed valid, since stat() didn't return an error, but drmPrimeFDToHandle failed.

Saying "no" to unethical tasks

https://emersion.fr/blog/2020/saying-no-to-unethical-tasks/

Status update, November 2020

https://emersion.fr/blog/2020/status-update-23/

Initial renderer v6 work merged in wlroots 🎉

Can't wait to be able to take advantage of that for libliftoff, explicit sync and all of the cool upcoming features!

Join us for basu development:

- Doesn't require to think too hard
- Just delete large chunks code as long as it compiles
- The code you get to delete is terrible, so you'll sleep better afterwards
- Can be seen as payback for all of the bad code you've written during the day

Some doctors even recommend it!

https://github.com/emersion/basu

Support for AMD modifiers is being merged in Mesa's radeonsi 🎉

https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6176

Pretty cool that a SourceHut engineer can discuss with a Google engineer about the best way to fix an amdgpu bug

Linux graphics, why sharing code with Windows isn't always a win

https://airlied.blogspot.com/2020/11/linux-graphics-why-sharing-code-with.html?m=1

Heard on IRC

<airlied> cmake's reason for use mostly seems to be it works on Windows which seems to mean people use it when it's truly horrible

wlroots 0.12.0 is released!

https://github.com/swaywm/wlroots/releases/tag/0.12.0

I don't know why, but sometimes I fall in love with a song on first listening. This just happened with:

https://www.youtube.com/watch?v=PJuYNg0EJWM

number_of_people_who_invented_scfg_before_it_existed++

https://weeaboo.space/notice/A0vswsmtiFO2VO1fHc