Principal Software Engineer at Red Hat Czech.
Joined February 2016
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Jan Grulich retweeted
It doesn't bring much relief knowing that the initial patches likely were not complete while millions of tokens are being spent trying to produce working exploits + find related vulnerabilities.
⚠️ UPDATE: PHP maintainers have verified a separate double-free regression in PHP 8.4.27/8.5.12.
It may be related to the researcher's earlier crash report, but that connection isn't confirmed.
Neither finding establishes that the php2shell patches failed or that RCE is possible.
Repo updated: github.com/php/php-src/issue…
#php #CyberSecurity
Jan Grulich retweeted
Pro mě tohle je nový DeepSwe. :)
bughunt.productcompass.pm/?p…
DeepSwe už nemá aktualizace, nepřidává nové modely.
Byl super a porazil ho až Gemini 3.8 Flash a s ním firmy přišli na to jak tam získat super skoré i s mizerným modelem.
I tested Haiku 5.5 on real work. 2 repos. 105 replanted bugs frontier models missed at the beginning of 2026. Find and fix what you can.
I've skipped Astra, Fable, and max effort levels. The results:
Opus 5.5 (xhigh): 36 for $34.98
Sonnet 5.5 (xhigh): 36 for $19.85
Haiku 5.5 (max): 21.5 for $5.83
DeepSeek V4.1 Flash (high): 19 for $0.31
GPT-6 Luna (max): 18.3 for $0.52 - but see the time
Gemini 3.8 Flash (high): 18 for $11.03
Haiku 5.5 (high): 16 for $4.80
Haiku 4.5 (default): 1.5 for $2.22 - didn't support effort at all
Between 4.5 and 5.5 Haiku went from a useless model without effort levels to a capable one able to perform real engineering tasks.
🧵More stats in the thread below.
Jan Grulich retweeted
I started a new git staging tool: halfline.github.io/git-stage… anyone who likes it try it, anyone who likes me star it on github (github.com/halfline/git-stag…)
Jan Grulich retweeted
Firefox & Linux in 2025
mastransky.wordpress.com/202…
Jan Grulich retweeted
With todays exciting Fedora Workstation 42 release out I also wrote a blog post outlining some of the cool stuff in this release.
blogs.gnome.org/uraeus/2025/…
#linux #Fedora42
Jan Grulich retweeted
Our new website is now live at granitecode.ai and the first pre-release of the plugin can be found on the VS Code Marketplace!
Fedora 41 switched Firefox to use @PipewireP for webcams, but the transition hasn’t been smooth for everyone. I’ve noticed common issues popping up—here’s my guide to help you debug and fix them.
🔗 jgrulich.cz/2024/12/13/when-…
Jan Grulich retweeted
Hi, anyone interested in joining my team at Red Hat to work on AI Code assistance with Granite AI and VS Code? Need you to be able to work in Boston, Massachussets - redhat.wd5.myworkdayjobs.com… #ai #linux #vscode #granite
Jan Grulich retweeted
#toolbx dot-zero release is now available: github.com/containers/toolbo…
🎉 Exciting news! Hans de Goede just dropped a detailed blog post on his work on IPU6 camera support in @fedora 41: hansdegoede.dreamwidth.org/2…. Together, Hans and I have also ironed out all the issues with @PipewireP camera support in @firefox so it's ready for prime time! 🚀
Jan Grulich retweeted
With the latest Fedora-Rawhide / Firefox - (and libcamera) releases the camera "just works" in video calls now - no need to install additional packages - just upstream software at last! (running here on an ARM64 Lenovo X13s)
I can stop using custom firefox builds now!
🚀 Exciting news! In @fedora 41, @PipewireP will be the new default for camera handling in @firefox! 📸 Get the full scoop here: jgrulich.cz/2024/08/19/makin…
Jan Grulich retweeted
PipeWire 1.2 is finally released! More info here:
gitlab.freedesktop.org/pipew…
Jan Grulich retweeted
Some details on how #toolbx enables the proprietary NVIDIA driver: debarshiray.wordpress.com/20…
Jan Grulich retweeted
Just posted a new blog post about Fedora Workstation! Updates on Artificial Intelligence, NVIDIA drivers, Container Toolbx, PipeWire and more.
blogs.gnome.org/uraeus/2024/…
#linux #fedora #instructlab #granite #articifialintelligence #gnome #pipewire #toolbx
QAdwaitaDecorations plugin is now part of Qt 6.8. You no longer need to install 3rd party plugins for client-side decorations on GNOME.
phoronix.com/news/Qt-6.8-Bet…
Jan Grulich retweeted
Wrote a blog post talking about the developments with PipeWire camera support in applications and also the FireWire FFADO support. If you read my previous tweets about this there is not to much new in the blog post.
blogs.gnome.org/uraeus/2024/…
#pipewire #linux #fedora
Jan Grulich retweeted
My manager is hiring an AI/ML engineer to work on the components to provide the AI/ML environment necessary to develop AI-based applications, tools and infrastructure. If AI/ML and FOSS is something that you are passionate about, don't hesitate to apply!
social.icims.com/viewjob/pt1…
You can now use @PipewireP camera support in the latest @firefox release. It's still not enabled by default and there might be still some issues. That's why I wrote a post about how to use it and debug issues you might encounter: jgrulich.cz/2024/01/30/how-t…. Happy testing!