not quite minimalistic enough  


Hidden treasures

If anyone out there knows the story behind OaEnablePerUserTLibRegistration(), would you mind sharing?


Deep Fail

The Grauniad at work?

Contradictions in terms

“He will now head to the South Sandwich trench […]. That trench, 8,428 metres below the surface, is unnamed […].”

It’s unnamed? I thought (and at least Wikipedia agrees) it was called the South Sandwich trench? And why does your own map say 8183 m and the article 8428 m?


That's not how this works.

Yes, well, YouTube, that’s not how classical music works. You can have the same piece played by different orchestras.

YouTube screenshot

But you know that, of course, and do not care the first little bit.

I do, however, recommend everyone watch this concert.


Wäre besser gegangen.

Das Risiko dabei, Nachrichten von Praktikanten schreiben zu lassen: Manchmal kommt solcher Stuß dabei heraus.


Big Tablet is watching you.

reg add HKCU\Software\Wacom\Analytics /v Analytics_On /t REG_SZ /d FALSE /f

Interessanterweise interessiert sich das Wacom Desktop Center beim Start sogar ausdrücklich dafür, ob procmon läuft. Sachen gibt’s …


Uh, o!

Note to self:

When you cannot make installworld from NFS and have to use rsync to get the src and obj trees to the target, do not try to --exclude '*.o'. installworld really likes crt1.o and will be exceedingly unhappy if it is not there.


Wasting time for fun and profit

I just spent a total of about two days bisecting the FreeBSD kernel to find the cause of a particular panic I’d been getting while booting on a Jetway NF9HG Mini-ITX mainboard.

Of course, -CURRENT being what is, some revisions between the branch point and releng/12.0 aren’t exactly amenable to compilation, and where they are, other bugs like to hide the behavior I’m looking for.

(Having to react to “fatal trap 12” with git bisect good is also somewhat unnatural, but that’s not what I was looking for, after all.)

Anyway, at some point during my travails, I became aware of a particular kernel tunable, introduced to prevent trouble with something called “EFI runtime services”. The name of the thing was efi.rt_disabled. I put it into loader.conf and happily kept bisecting. It even worked, preventing some crashes on kernels that had not previously booted.

Then things became confusing. The problem appeared to be fluctuating; rather than the “trap 12” on earlier revisions and the panic on later ones the two seemed intermixed somehow.

End of day 1.

On day 2, being the present day, I started over from the beginning, and the results made sense again. At first anyway. I had forgotten about the tunable, which turned out to have been a very good thing.

Five hours into bisecting, I had just arrived at the very last commit to test, the commit message reminded me, and I looked in UPDATING again to refresh my memory.

Then my eyes went wide … where did that dot come from … no, they didn’t … did they?

Yes, they did. Back in July, someone renamed the tunable, replacing the underscore with a second period; what had been efi.rt_disabled now became efi.rt.disabled. When I first found it in UPDATING I must have been on a commit before this change. Later on, I obviously had no reason to recheck the spelling.

Anyway, setting the correctly spelled tunable fixed the panic.


Closing in.

git bisect is the best binary-tree thing since Turduckenailailenailailduckenailailenailail.



When Knuth started on TeX, his motivation is reported to have been to improve math typesetting, because his earlier books were often mangled by typesetters/printers who did not understand the math and hence did not notice when they got it wrong.

Hence, the whole point of and reason for TeX is to produce good-looking math.

Why, then, is this still allowed to happen today?


Use \mathit{}, people!

Update: Then again, from the same paper:

Fig. 2: Fault injection with the help of syringe needles.