It should be no news that PayPal have made an habit of opposing to projects that fight for the respect of freedom and democracy by cutting their funds. Anyway, they have just provided us another example of such an abuse, against the ProtonMail project.
Allowing computer suspend
Major desktop environments such as Xfce or KDE have a built-in computer suspend feature, but when you use a lighter alternative, things are a bit more complicated, because basically: only root can suspend the computer. Possible solutions include:
- using sudo to allow members of a given group to run a suspend
- using a D-Bus UPower thingy, which communicates with a
running daemon upowerd:
$ dbus-send --system --print-reply \ --dest='org.freedesktop.UPower' \ /org/freedesktop/UPower org.freedesktop.UPower.Suspend
With recent updates of the related Debian packages — no idea of which one exactly — the latter solution may not work any more, in which case it will only return the following error:
Error org.freedesktop.UPower.GeneralError: not authorized
It appears that this error is linked to ConsoleKit, a part of all
this modern *Kit gizmo pile. If you are in this case, try prefixing your
session launcher with the undocumented dark magic call
ck-launch-session. For instance, this is what I
have in my .xsession to launch my window
exec ck-launch-session i3
Note: I do not know what
ck-launch-session does exactly, why it is
needed, and I do not want to know. To me, all that WhatsitKit pile is
just some opaque, under-documented — as in: no man page — crap, that no
one but their author really understand, designed to solve theoretical
problems no one really cares about — like: how to allow locally
connected users to use the sound card while forbidding it to remote
users — while creating new issues such as this one. This stuff is too
complex and under-documented for me to dive into it, so if it does not
work out of the box, it is just some crap that gets in my way to using
my computer as I wish.
Disabling a monitor
In some configurations, you have two monitors and want to disable one. For instance, in addition to my LCD monitor, I have a projector which I only use for movies. According to xorg.conf's man page, it can be disabled this way:
Section "Device" Identifier "Internal graphic card" Option "Monitor-DVI" "LCD Monitor" Option "Monitor-VGA" "Projector" EndSection Section "Monitor" Identifier "LCD Monitor" EndSection Section "Monitor" Identifier "Projector" Option "Enable" "false" EndSection
Except that does not work, because contrary to what the man page says the real option to use is not Enable but Disable! So here is the correct configuration to disable that monitor at start-up:
Section "Device" Identifier "Internal graphic card" Option "Monitor-DVI" "LCD Monitor" Option "Monitor-VGA" "Projector" EndSection Section "Monitor" Identifier "LCD Monitor" EndSection Section "Monitor" Identifier "Projector" Option "Disable" "true" EndSection
Note: yes, I will send a bug report with a patch against xorg.conf's man page.
Using address extension
Postfix (and many other mail servers) offers one nice address
extension feature: addresses like
<user+whaterver@> are implicit aliases to
<user@>. This allows users to implement a simple measure to
- when SomeCompany® or whatever asks for your email address, give
- if you start receiving spam at that address, you know who sold or was stolen your address;
- finally, you will be able to disable that address so messages are simply refused with a permanent error code.
Web cookies are meant to store user preferences for a website, but they are often misused for evil purposes, such as tracking him, sometimes across distinct websites.
Thanks to a corporate reward program, I just got a Pure Sensia digital and Internet radio receiver: basically, it is a device able to play streams from FM, DAB, HTTP and USB sticks. In overall, it works fine, and it has a remote controller, so it makes a nice addition to my home equipment, but it has what I consider a major flaw, which I suspect to have been designed on purpose.