Language Selection

English French German Italian Portuguese Spanish

When X decides to crash

Filed under
Software

Yesterday evening at 20:45 (UTC+1) I decide to do a good deed and help Mamarok help a Kubuntu user getting his system fixed.

The symptoms sound quite familiar (apparently there also have been quite some cases of this): login doesn't work, get thrown back to KDM.

At approximately 21:00 I realized that simply helping to help will not suffice in this particular case.

At 22:36 I gained SSH access to the affected machine.
At 00:43 I found the source of the issue.
At 01:17 I got all data for a somewhat feasible bug report.

OH MY!

I certainly do hope that you now wonder what the problem was I spent around 4 hours of time on. Well, an X crash, though you probably guessed that much already from the title of this post Wink

More interesting is how we got there, I collected the most important data in the bug report on launchpad.

Apparently some recent update triggered the issue. Naturally I inspected the dpkg.log, but since there was one rather large update recently, that did not give me much of a clue, xsession-errors is also rather unspectacular, well, other than the X connection problems (I suspect those were caused by X going down?).

So while I was digging around finding a sensible way to debug this properly, the help-seeker made some very weird discovery.




More in Tux Machines

Debian 9.0 "Stretch" Might Not Have UEFI Secure Boot Support

Debian 9.0 "Stretch" has seen UEFI Secure Boot support no longer being considered a release blocker but is now just a stretch goal for this upcoming release. Debian developer Jonathan Wiltshire shared that while Secure Boot support was planned for Debian 9.0, it might not happen now due to short on time and resources. Secure Boot might still work its way though into a later Debian 9.x update. Read more

Development News: Rust 1.17 and SourceForge

  • Announcing Rust 1.17
    The Rust team is happy to announce the latest version of Rust, 1.17.0. Rust is a systems programming language focused on safety, speed, and concurrency.
  • Rust 1.17 Released
    Judging by the massive Rust fan base in our forums, those of you reading this will be delighted today about the newest version of Rustlang, v1.17.
  • SourceForge: Let's hold hands in a post-CodePlex world [Ed: Microsoft Gavin needlessly interjects Microsoft into it. Like CodePlex was EVER relevant…]
    President Logan Abbott has said he’ll seek tighter integration between SourceForge’s tools and those of others – including giant rival GitHub.

Nouveau Re-Clocked With DRM-Next Linux 4.12 + Mesa 17.2-dev vs. NVIDIA 381 Driver

A few days back I posted benchmarks of the initial GTX 1050/1060/1070/1080 Nouveau 3D support. As expected, the performance was rather abysmal with re-clocking not being available for Pascal (or Maxwell) GPUs on this open-source NVIDIA Linux kernel driver. For those trying to use Nouveau for Linux games or care about your GPU clock speeds, currently the GTX 600/700 "Kepler" series is still your best bet or the GTX 750 "Maxwell 1" is the last NVIDIA graphics processors not requiring signed firmware images and can properly -- but manually -- re-clock with the current Nouveau driver. Read more

Coverage From Recent Linux Conferences