Unanswered Questions
16
votes
1answer
762 views
Using zsh's line editor to wrap around subprocesses
Is it possible to use zsh's built-in line editor (zle) to feed input to a subprocess? That is, I would like to run zlewrap mycommand where zlewrap is a zsh function and mycommand is any program that ...
12
votes
1answer
1k views
How can I detect when a monitor is plugged in or unplugged?
Is there any event that is triggered when I plug in or out an external monitor into the DisplayPort of my laptop? ACPID and UDEV don't react at all.
I'm using onboard graphics on an intel chip. Here ...
12
votes
0answers
758 views
High CPU usage with CFS?
I asked a previous question to try and isolate the source of an increase in CPU usage when moving an application from RHEL 5 to RHEL 6. The analysis that I did for that seems to indicate that it is ...
11
votes
2answers
1k views
FreeNAS grub2 booting ISO
I've got usb-keys setup to multi-boot different Linux images. I wouldn't mind adding FreeNAS, and there's a doc with samples to add to grub.cfg
menuentry "FreeNAS-8.0.4-RELEASE-x64" {
insmod ufs2
...
11
votes
2answers
4k views
Recovering ext4 superblocks
Recently, my external hard drive enclosure failed (the hard drive itself powers up in another enclosure). However, as a result, it appears its EXT4 file system is corrupt.
The drive has a single ...
11
votes
3answers
311 views
Prompt user on Linux security denial
Is it possible to make a Linux security module (eg. AppArmor, SELinux etc.) prompt the user, when an application wants to access classified files or folders (digital signatures, SSH keys, credit card ...
10
votes
0answers
86 views
+100
How can I put my HDMI display into (and out of) power save mode?
I am using a Pi to run an information display in an office. I want the display in power save mode when outside of business hours. I was going to use cron to execute something at the beginning and ...
10
votes
0answers
182 views
How to get started writing drivers?
I have a throw-away cheap laptop I'd like to twiddle around, a Thinkpad SL 500.
What bothers me are two leds, the one for wireless connectivity, and the one for hibernation, which don't light up at ...
9
votes
0answers
24 views
Why does Linux purge the memory cache when it is nearly full?
Here's what the memory graph looks like on a VPS running CentOS with 512MB of RAM and nginx/php-fpm/mysqld serving (mostly static) content to a couple thousand visitors per day.
As you can see, ...
9
votes
2answers
639 views
Increasing kernel memory size
I have an embedded board with 512MB of RAM running linux 2.6.29 and UBoot bootloader. But the kernel is able to utilize only 128MB of RAM. I tried changing the value of XCODE_MEMSIZE, which i think ...
9
votes
1answer
462 views
Install new kernel in PowerPC debian
I compiled a new kernel image on x86 using cross compiler with these commands (source):
$ cp arch/powerpc/configs/pmac32_defconfig .config
$ make ARCH=powerpc menuconfig
$ make ARCH=powerpc ...
9
votes
1answer
782 views
What is the difference between the various tiling modes in KWin, and how do I use them?
There are 3 tiling modes in KDE: spiral, columns and floating. What does each do and how do make them work for me? For example, spiral seems to cut my screen in half then the next half another way. Is ...
9
votes
1answer
464 views
Driver is sometimes loaded, sometimes not
I was assigned an Ubuntu desktop with some stuff already on it. I did not reformat it, but attached a mini-PCI wireless card over a PCI to mini-PCI adapter. I manually built the madwifi driver and ...
9
votes
2answers
353 views
How do I prevent programs from sniffing keystrokes to su/gksu?
I've read here that it's possible for any app using the X server to sniff keystrokes to any other app which is also using the X server, including su (on a terminal) or gksu. I've heard of a few ways ...
8
votes
2answers
264 views
Deny flash plugin access to (a particular) webcam
I recently bought an external webcam to play around with OpenCV. It works great out of the box in Debian, but I realized that when I browse any site that contain flash content (youtube, soundcloud), ...
