Javier Martinez C. / is on Nostr

Linux hacker at Red Hat, Fedora contributor, husband, father, runner. he/him.

Last Notes

2024-06-20 20:40:19

It seems that a blue #Linux DRM panic triggered some people, so here is a “Black Screen Of Death” on a #SSD1306 display!
https://cdn.fosstodon.org/media_attachments/files/112/650/864/289/429/793/original/925f97fe405d3f91.png

2024-06-15 09:38:51

A “Blue Screen Of Death” on the #BeaglePlay board, using the new DRM panic infrastructure contributed by my awesome colleague Jocelyn Falempe.
#linux #kernelexploitkette #graphics
https://cdn.fosstodon.org/media_attachments/files/112/619/959/738/746/928/original/b48021fedbe5bc1b.png

2024-06-02 12:12:00

Wrote a post about some Linux kernel cmdline parameters I normally use to troubleshoot drivers' regressions (https://blog.dowhile0.org/2024/06/02/some-useful-linux-kernel-cmdline-debug-parameters-to-troubleshoot-driver-issues/), including the "regulator_ignore_unused" parameter (added in Linux v6.8) that can be used to prevent the regulator framework to disable regulator that are not used by any device.
#linux #kernel #embedded

2024-05-25 19:26:17

“Building Bridges, Not Barriers: Embracing Upstream Support for Lasting Results“ (https://www.youtube.com/watch?v=zwyE44A9-8E) is an inspiring presentation from Texas Instruments. And it is spot on, here’s a picture of my TI OMAP3 IGEPv2 board (released in 2009) running the latest Linux mainline kernel.
#linux #kernel #arm #OMAP3
https://cdn.fosstodon.org/media_attachments/files/112/503/265/711/843/575/original/5112b1db7b7e8ad2.png

2024-05-24 09:15:01

Since I've migrated from screen to tmux years ago, I always felt that missed screen's excellent support for serial devices.
But recently I found https://github.com/tio/tio which was developed exactly with that use case in mind and I couldn't be happier. Such an amazing tool.
#linux #kernel #embedded

2024-05-19 08:29:20

- reply

@npub1lut…jsj9 it’s likely that people already have an account. What I’m complaining is the friction for drive by contributions.

2024-05-18 12:22:55

The only thing more annoying than projects with a submit-patch-by-email workflow, are when they also require you to subscribe to their mailing list to prevent patches to be blocked on moderator approval. #foss

2024-05-06 09:19:32

- reply

@npub19la…hm4g I just wanted to point a out that since OSTree 2023.4 (https://github.com/ostreedev/ostree/releases/tag/v2023.4) immutability can be achieved using composefs.

2024-02-10 22:02:36

This is a great talk by @npub1dyk…agj7, I learned a few tricks from it:
https://www.youtube.com/watch?v=m7SduY2XrKM
#linux #kernel

2024-02-10 01:49:59

I just wrote about some work done a long time ago, but never found the time before to finish the post.
This is the support added to the Linux vfat filesystem to atomically exchange files.
https://blog.dowhile0.org/2024/02/10/atomically-exchange-vfat-files-in-linux/
#linux #kernel #filesystems #vfat

2024-01-22 17:38:42

Vulkan triangle example running on
#BeaglePlay board with today’s
@npub1gl5…7hk0 rawhide and no additional packages. May not seem a big deal but it’s quite exciting for someone who started his Linux Arm journey more than a decade ago working with a TI OMAP3 platform! #linux #graphics #fedora
https://cdn.fosstodon.org/media_attachments/files/111/800/819/257/783/809/original/f1ac7a371f9a69bd.png

2024-01-11 09:37:34

#Linux #kernel development is an exercise in choosing which hills you are not willing to die on.

2023-12-21 13:25:10

Great article from Thomas Zimmermann about the Linux graphics stack https://lwn.net/SubscriberLink/955376/2f631a2dad35aa86/