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The current state of UEFI and Linux

Filed under
Linux

Executive summary: Most things work fine.

Things we know are broken:

* Some Samsung laptops. The samsung-laptop driver is a slightly weird thing. By 2010 (when it first appeared) most vendors had moved over to using some level of firmware abstraction, either using ACPI or WMI. Samsung still seemed to be stuck around a decade earlier - they were providing a region of memory at a known address, and you'd read that address to find a bunch of offsets. Then you'd write magic values based on those offsets to magic system IO ports based on those offsets and something would happen. Those writes were triggering System Management Mode, a special x86 CPU mode where the processor executes code from memory that the OS can't see, without telling the OS that it's doing so. There's nothing especially new in this (SMM first appeared in the 386sl back in 1990), but it also means that you depend on the system vendor not changing the interface without telling you. Turns out that Samsung apparently changed their platform interface when they moved to UEFI, but didn't actually do anything to prevent old drivers from breaking things -

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More in Tux Machines

Distro Development: Rescatux and Bodhi

  • Rescatux 0.40 beta 9 released
    Many code in the grub side and in the windows registry side has been rewritten so that these new features could be rewritten. As a consequence it will be easier to maintain Rescapp. Finally the chntpw based options which modify the Windows registry now perform a backup of the Windows registry files in the unlikely case you want to undo some of the changes that Rescapp performs. I guess that in the future there will be a feature to be able to restore such backups from Rescapp itself, but, let’s focus on releasing an stable release. It’s been a while since the last one. UEFI feedback is still welcome. Specially if the Debian installation disks work for you but not the Rescatux ones.
  • Bodhi 4.0.0 Updates and July Donation Totals
    Late last month I posted a first alpha look at Bodhi 4.0.0. Work since then has been coming along slowly due to a few unpredictable issues and my own work schedule outside of Bodhi being hectic over the summer. Bodhi 4.0.0 will be happening, but likely not with a stable release until September. I am traveling again this weekend, but am hoping to get out a full alpha release with 32bit and non-PAE discs next week.

Devices and Android

Leftovers: BSD/LLVM

Emma A LightWeight Database Management Tool For Linux

Today who does not interact with databases and if you're a programmer then the database management is your daily task. For database management, there is a very popular tool called, MySQL Workbench. It's a tool that ships with tonnes of functionalities. But not all of us as beginner programmers use all Workbench features. So here we also have a very lightweight database manager in Linux, Emma. Read
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