General :: Random Keyboard Pseudo-failure?

Jan 9, 2011

Occasionally when I start typing into a text box, it will not enter text until I go to another window or text box and click back in. This seems to happen at random without any pattern or to any specific applications more than others. I can still use alt-tab and similar commands, so I know it's not the hardware. I am running Ubuntu 10.04 Lucid Lynx using a Microsoft Multimedia keyboard and I am running SCIM for Japanese input, but I almost always have it set to English, and it can be set t

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General :: What Is Short Cut Key To Toggle Between Pseudo Terminals In Red Hat?

Apr 21, 2011

what is short cut key to toggle between pseudo terminals in red hat? how can i create customized short cut keys in red hat?

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General :: Find The Valid Values For The Sys Pseudo-filesystem Interface?

May 11, 2011

Specifically, I'd love to know what the valid values of:

And, where I can find this information? I've always wondered if it was documented somewhere, or if there was an interface into the kernel to query for it.

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Ubuntu :: Random Freeze - Neither The Mouse Or The Keyboard Will Respond

Jun 14, 2010

I am running Ubuntu 10.04, randomly while working in gnome with no particular application I get a freeze periodically. Neither the mouse or the keyboard will respond. I am running it on a lenovo Z61m laptop. I have had previous experience with Posix systems but I am a recent migrant from XP as my primary operating system. I never had such an issue with this computer which leads me to believe that it is not a hardware issue.

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Ubuntu :: Random Mouse/keyboard Freeze In The Login Screen?

May 1, 2010

I downloaded and burnt the Kubuntu 10.04 release to a CD. I tried to install it. First time, couldn't find the disks and eventually it froze. Ok, second try, when it's contacting the "time server" (or whatever) another freeze, but this time I notice everything is running fine and then get a nice little image with the current time (increasing seconds and all). Third attemp, clicked the "update this installer" and it went fine. "Yay!" I thought. Well, a few minutes in my beautiful 10.04 system and again, another freeze. Hit the power button and to my surprise a "Shutdown" dialog shows up with a countdown. After 30 seconds it logs out and mouse is working again. I log back in and come here to write this long post, and as I was writing the title "Random mouse/ke..." guess what? Yeah, it froze again. And the little bar that goes after the writing continued happily blinking. Hit the power button but this time mouse and keyboard were still frozen in the login screen.

Short version: mouse and keyboard randomly freeze while the rest of the system apparently work fine.

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Ubuntu Installation :: 10.04 Loses Mouse / Keyboard Inputs At Random

May 28, 2010

I upgraded from 9.10 to 10.04 LTS last week (32 bit, gnome desktop, no desktop effects). The system was quite stable before the upgrade (it's usually on 24/7 with uptimes in the dozens of days), but ever since updating to 10.04, the system loses all mouse and keyboard input at random times.

I can still ssh into the system fine and reboot it in an orderly fashion from a laptop, but I'd rather that it wouldn't freeze like this in the first place

I've tried service gdm start / stop from an ssh session to see if it's an xorg-related problem, but sadly that did not help in recovering mouse / keyboard input.

I also tried unplugging and re-plugging the ps/2 keyboard and the usb mouse, but sadly that also didn't help.

I don't see any weird messages in dmesg, so it's not a kernel oops either it seems.

I'm using the proprietary nvidia driver if that matters.

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Ubuntu :: Wireless Keyboard Is Typing Random Letters Not Even Touching?

Aug 5, 2010

I have a wireless keyboard and for some reason it is typing random letters, symbols, and numbers while I am not even touching the keyboard. I tried a different wireless keyboard and that worked for awhile, but even that started to do the same thing. I plugged in a cord keyboard and that has been working fine, but I am unable to type my password if it goes into sleep mode or select my windows partition. It's very confusing and I plan on reinstalling both windows and linux anyways it's that time, but I have to figure this problem out before I do.

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OpenSUSE Hardware :: Keyboard Failure In 11.2 Kde

Mar 3, 2010

I have a a Compac Presario laptop 1.5G AMD Turion64, 1.2G ram, ATI radeon xpress 200m. I originally tried to install 11.2 w/gnome but could not get a screen. I erased the partition and installed 11.1 kde. That seemed to work ok so I upgraded to 11.2. Now the keyboard doesn't work with the gui, although it works in grub. I have tried >sax2 -r< and >sax2 -r -m 0=vesa< in run level 3 but each of those killed both the keyboard and the mouse so I had to shut it down using the power switch. Should I go back to 11.1

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Ubuntu :: Keyboard Failure In Boot Menus

Feb 26, 2010

When I start up my computer I get an error message in the BIOS of keyboard failure. I have a dual boot so this is a problem when I want to start windows. I had a recent power outage and the computer got shut off. Then the keyboard started working for two boots. After that the error returned.

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Ubuntu :: Keyboard Failure - But Only In One User Account?

Jan 11, 2011

This is the second machine of mine where the keyboard has quit once the machine is fully booted. However, this only happens in one user account, in both cases, the most-used account. The keyboard works fine in the other user accounts on both machines, and the keyboard works fine in all accounts when logging in. It is only when Kubuntu 8.04 is up an running that the problem occurs.

In the problem accounts, pressing and holding one of the keys does generate input, but it comes in pairs. I cannot type a single letter. It looks like the delay and repeat rates are messed up, but resetting them in the control panel does nothing. On one machine, I just installed a newer version of the OS. On the machine in question now, however, it is a business machine, and I don't want to have it down if I can 'save' it. I am guessing that this is a config issue somewhere in the innards of KDE 3.5. Can I safely delete a hidden directory somewhere, and force KDE to recreate a new set of config files?

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Hardware :: Keyboard Failure And Updating BIOS?

May 12, 2010

I am using a Dell dimension 4550 with pentium 4 processor. My current BOIS is A01. I am running Slackware 13. My current problem is that whenever I reboot, the keyboard fails just before the kernel selection page. This isn't a huge problem because I only have one kernel to boot but it is quite annoying. Whenever I shutdown the computer and boot it up again the keyboard works fine. The problem only occurs when I reboot.How do I fix this? Would updating the BIOS solve the problem?

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Ubuntu :: Keyboard Failure On Multiple Distros When Installing

Aug 26, 2010

I just recently purchased a Lenovo Netbook s10 3c which I planned to use for working and such. I have always been interested in the idea of using a Linux system, and so I downloaded the ISOs for Ubuntu Netbook 10.04 and also for Ubuntu Desktop 10.04 and 9.04 as well has Fedora 13. (I wanted to try some out.)

Unfortunately, for ALL of the distros, I run into a snag. When installing any of them, my keyboard will not respond to any keystrokes, even arrow keys, enter or caps lock. I have searched on google, linux forums, ubuntu forums and lenova's site, all to no avail. It seems that everyone who is having problems is having problems with some other sort of system which involves a virtual keyboard or USB keyboard (I do not want to have to use a USB keyboard - that would silly considering I bought the thing for easy portability).

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Debian Installation :: Plug USB Mouse And Keyboard In After This Failure Which Then Works

May 10, 2011

I'm trying to net install Wheezy on an Abit IC7-G PIV system. I tried this months ago but the problem still exists. This is not so much an installation problem but after installation when it boots, I lose PS/2 mouse, PS/2 keyboard and network. I get:

startpar. service(s) returned failure udev ... failed I can plug USB mouse and keyboard in after this failure which then works. There is nothing wrong with the hardware. It works fine on other systems. Squeeze works perfectly.

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Ubuntu Installation :: Keyboard And Mouse Failure When Trying To Run Live Disk

Oct 9, 2010

Keyboard and mouse failure when trying to run a live Ubuntu disk on an Acer Aspire M1641 desktop. I was trying to show off the Ubuntu system to a colleague when to my surprise as it booted up both keyboard and mouse died. There was no response at all, the only option was to use the power button, rebooting into Vista all back to normal. I tried several other versions of Ubuntu going back 8.04 even Knoppix failed to get the keyboard and mouse working. Even after re installing the windows drivers and several more attempts even changing keyboard and mouse, I could not get any linux live disk to work.

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General :: Send Commands To Another "pseudo Terminal"?

May 8, 2010

Is there some way to send commands to another "pseudo terminal" or otherwise access one when the desktop environment has frozen to get a program there to save its data? (i.e. after logging in remotely) I tried "echoing" to "/dev/pts/X" (X = number) but that doesn't seem to work. It just displays whatever is echoed there -- it is not accepted as input.

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Debian Hardware :: Keyboard Multimedia Keys Doesn't Respond After Power Failure

Jul 23, 2014

Yesterday something has happened with power supply, so 2 of 3 PCs has shut down. And now my debian pc doesn't respond to multimedia (volume to be precise) keys, leds also doesn't work. Other keys are fine. Tried xev, but it doesn't respond to multimedia keys either. I have dual boot with Win7 on this machine, and it works fine with multimedia keys.

I believe this is a clue:

Code: Select all[   22.324109] generic-usb: probe of 0003:04D9:1702.0004 failed with error -110

uname -a:
Code: Select allLinux sharlin 3.2.0-4-amd64 #1 SMP Debian 3.2.60-1+deb7u1 x86_64 GNU/Linux

dmesg:
Code: Select all[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 3.2.0-4-amd64 (debian-kernel@lists.debian.org) (gcc version 4.6.3 (Debian 4.6.3-14) ) #1 SMP Debian 3.2.60-1+deb7u1
[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.2.0-4-amd64 root=UUID=57fa72ea-ce79-4da0-a74d-2ffee8573437 ro quiet
[    0.000000] BIOS-provided physical RAM map:

[Code] ....

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Red Hat / Fedora :: Pseudo-ttys - Both BSD And SVR5 Versions Seem To Be Incomplete

May 21, 2010

I'm trying to complete the porting to RHEL 5 of a commercial application that we've had running on AIX and SCO for decades. It originally ran on dumb-terminals, and even now runs on dumb-terminal emulators that run on Windows. We have thousands of customers, many of whom we'd like to migrate to Linux. We're pretty much done with the port, with the exception of this little glitch we're having with pseudo-ttys...

Our app utilizes pseudo-ttys, such that sub-portions of the application run under a screen manager that provides for screen-switching of multiple instances of the sub-apps on non-GUI terminals, some of which are still running serial. In this regard, it is not unlike the GNU "screen" program. However, it also supports file transfers over serial links using zmodem, and requires the ability to switch in and out of a fully 8-bit transparent mode where the screen switching keyboard commands must be ignored.

On AIX, we're using the BSD TIOCUCNTL (UIOCCMD) capability to send commands from the sub-app to the screen manager. TIOCUCNTL provides custom user ioctls and is an ideal way to solve the problem. It is not implemented on Linux, and the "alternative" of TIOCPKT does not provide arbitrary ioctls so at best we'd have to commandeer some of the existing TIOCPKT ioctls for our own use if that's even possible. TIOCPKT seems like a hack, it apparently was implemented not as a general mechanism but to solve problems specific to rlogin/rlogind.

SCO didn't support TIOCUCNTL either, so years ago we used the SVR5 alternative of putmsg/getmsg. This is a streams-based mechanism of sending control information over streams separate from the data. While RHEL 5 seems to have man pages indicating these commands exist, and in fact you can link programs using them to libc without errors, they are apparently stubbed out and return "function not implemented." This seems to be, according to this Wiki, due to certain Linux factions deeming that streams are "technically inadequate":

Certainly, I would agree that a streams implementation that is incomplete is undoubtedly "technically inadequate."

At the same time, it would appear that the SVR5 method of pseudo-tty is now the recommended implementation, the BSD one being "deprecated" (not to mention, also incomplete on Linux, given TIOCUCNTL is missing):

So here I am trying to figure out how to solve the problem. I have found a library that apparently implements the getmsg/putmsg commands for Linux, called libLiS. However, according to IBM, it has a problem with SELinux:

We've had to disable SELinux for other reasons anyway, so this is not a show stopper for us, and I am actively exploring using it as our solution. However, I've never been exactly crazy about the idea of depending on disabling security features to make something work. But, there's something to be said for the compatibility it would offer for our apps.

However, it occured ot me that we are probably not the first to have this problem, and was wondering if perhaps there is another solution that we should consider.

It has occured to me to use named pipes, but this would be rather ugly--we'd have to maintain a directory full of hundreds of named pipes, probably named after the associated ptys that the sub-apps could use to issue control commands to their screen manager, and the manager would have to monitor these pipes for commands, etc.-- certainly possible, but it seems like it might be re-inventing the wheel a bit, or at the very least, is a somewhat kludgy work-around to the apparent lack of any user-customizable control mechanisms in the pseudo-ttys. And we'd have to support it in addition to the code for the other methods since those platforms aren't going away anytime soon (SCO death-throes notwithstanding).

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Server :: Parallel Multiple Ssh Tool Pseudo Tty Support

Jan 24, 2011

I use mpssh or pssh to issue commands to multiple servers. Problem is that some of the commands require pseudo terminal and won't work with these tools. This will work just fine: "ssh -t user@server command" as stated under SSH man: -t = Force pseudo-tty allocation. This can be used to execute arbitrary screen-based programs on a remote machine, which can be very useful, e.g., when implementing menu services.

Multiple -t options force tty allocation, even if ssh has no local tty. So, is there a workaround for the above tools? Or is there any other tool for multi server administration that will work? If you are not sure what I am talking about just try executing "ssh user@server top" and "ssh -t user@server top" to know exactly the difference.

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Programming :: Pseudo Virtual Files In Shell Script?

Jan 30, 2010

Perl has the concept of pseudo virtual files where data can be appended to the end of the script, & Perl will treat it as a legitimate source of data:

Code:
$ cat pseudo_file.pl
#!/usr/bin/env perl
use strict;
while (<DATA>) {
print; }

__DATA__
1
2
3
$ perl pseudo_file.pl
1
2
3
$ _

I would really like to be able to do something similar in a Bourne shell script where I don't have to manage a collateral text file which is prone to getting lost. Does anyone know if there is a similar construct in shell programming? I would have thought this feature was a remnant that Perl inherited from its shell programming roots, but searching on the Web has revealed nothing of consequence.

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Ubuntu Multimedia :: Copy Random Jpg From Random Folder

Jan 19, 2010

I'm looking for a script that copies a random .jpg from a random folder in my ~/Pictures folder to my ~/temp folder with a standard filename. This file will then be displayed in Conky. I can fix the last part, but I cannot find a way to do the first part.

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Ubuntu :: Script To Open Pseudo-terminal At User Login To GUI: (kiwi) 10.04?

Nov 26, 2010

I've been able to write a basic script that opens a terminal a lil messagemy issue, i want it to open its pseudoterminal as soon as i log into GUIthe script:

Code:
#!/bin/bash
if [ $1 = "start" ]

[code]...

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Ubuntu / Apple :: Script To Deal With Pseudo-hardlinked Directories In Time Machine Backups

Jun 16, 2010

Just wanted to share a script that I wrote to migrate data off of a Time Machine backup. As anyone who's tried this knows, it's not straightforward because most directories are pseudo-hardlinked according to some hare-brained scheme Apple came up with. (Hard-linked directories actually show up as zero-length regular files with bizarre link counts greater than 128. The link count corresponds to a directory called "dir_$N" (where $N is the link count) inside of a special directory at the root of the Time Machine volume called ".HFS+ Private Directory Data^M" (where the ^M is a literal carriage-return character).)

Here's the script (it's also attached, for convenience). It works pretty much the same as "rsync -av <SRC_DIR> <DST_DIR>" would, if the pseudo-hardlinks weren't in the way. In other words, it just recursively copies the first directory to the second. So the first argument (the source directory) is typically something like

/media/<TIME_MACHINE_VOLNAME>/Backups.backupdb/<HOSTNAME>/Latest/<VOLNAME>

if you want the entire latest backup. It can also be a relative path, if you've already changed to a directory inside the backup.

[Code]....

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General :: Using Ubuntu Keyboard Layout In Mac OS X With A PC Keyboard?

Dec 24, 2010

I'm a used Ubuntu user on a pc, and I like the french keyboard layout because it allows me to type accentued characters easily.I found a win-fr keyboard layout but it's much like windows and not so good.I found xmodmap.fr keyboard layout and I'd like to know if it was possible use it with my Mac SL 10.6.5, maybe I could do xmodmap xmodmap.fr or a way to convert to mac layout file.

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General :: Random Numbers Between -5.0 To +5.0?

May 25, 2010

How to create random numbers between -5.0 to +5.0

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General :: Point /dev/random To /dev/urandom

Jul 12, 2011

I have a server that cannot generate enough entropy to support /dev/random. The particular piece of software having problems can't be configured to use /dev/urandom.

I tried moving /dev/random to /dev/realrandom and symlinking /dev/random to /dev/urandom, but lsof /dev/realrandom still shows processes using it.

In Does urandom share the same entropy of random?, the suggestion is to use mknod /dev/random 1 9. Will this hold across restarts? Should I be using udev somehow?

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General :: Use RANDOM Number In Procmailrc?

May 2, 2011

I want to generate random name for email file name to prevent overwriting but $RANDOM ENV VARs does not work in it what can I do? this is my procmailrc:

Quote:

SHELL=/bin/bash
SUBJECT=`formail -xSubject:`
FROM=`formail -xFrom:`
SUBJECT=`echo $SUBJECT | sed -e 's/ /-/g'`
FROM=`echo $FROM | sed -e 's/.*<//g' | sed -e 's/>//g' | sed -e 's/@/AT/g'`
STOREFILE=20`date +%y-%m-%d_%H-%M-%S`_${FROM}_${SUBJECT}_${RANDOM}${RAMDOM}

it works fine except ${RANDOM}${RAMDOM} and I do not want to use mktemp command .

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General :: Generate Random Number Either 1 Or 0?

Jan 21, 2010

Not only that but I need tons and tons of them generated, and I need it to be totally random each time.

Code:
matthew@mvm:/h/misc> cat a
#!/bin/bash
for i in {1..5}; do
echo $RANDOM

[Code]....

There you can see that it is the same number. It does that every time!! Grrr. The strange thing is each time I manually type [or copy & paste] it into the terminal, it gives random [not static, like I am getting from my script] results.

The reason I want this is because I am making a script where this line will randomly go up or down [depending on if the random number is 1 or 0].

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General :: Random System Freeze ?

Mar 2, 2010

I'm running Fedora 12 with GNOME on an old Toshiba Satellite A15. From time to time I get a system freeze, where everything stops working besides the touch pad (I can move the cursor, just can't click on anything). When I boot up, I see an error message that it skips past before I can read anything, although I have spotted the snippets 'pci' 'error' and what appears to be the 0x at the start of a memory address. When I try and shut down the system (going either by command line or the System->Shut Down part), I get to the part where it says "Unmounting filesystems..." and then it stops right there. When I boot it back up, I get an error that says "A crash in package kernel has been detected."

The same happens when I boot up after the hard freeze. It seems more frequent when I have a heavy load on system memory, but for the most part it seems random. I've seen it crash after 5 minutes with only Pidgin or gedit open, I've seen it run for weeks with over 100 Firefox tabs, Pidgin, 3 documents, and GIMP running, but it seems more likely in the second scenario. It also seems to have a chance of freezing again within 5 minutes of rebooting (even if I don't touch anything after login). I ran Fedora 8 and Fedora 10 on this computer just fine, with most of the same system settings (copied my /home folder for each upgrade). I have a dual-boot system (XP/Fedora), with a third partition for data and a 200MB partition for the boot loader. The partition with Fedora is encrypted, and the crashing while trying to unmount the filesystem implies to me that might be the problem, but whatever it is, it wasn't in Fedora 8 or 10 (at least as far as I could tell).

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Server :: Setup A Pseudo Home Server

Dec 7, 2010

I'm trying to setup a pseudo home server. Basically I just want to be able to log into my machine from work. The problem is that I have a dynamic IP address.My question is probably obvious, but bare with me: I know that you can login to a computer by its name (ie. ssh ApacheRoseXBones@HomeStation.stuff). What does one need to do to be able to log into their machine like this?

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General :: Does 'urandom' Share The Same Entropy Of 'random'

Jun 10, 2010

Does the entropy pool /dev/random used the same to /dev/urandom?

I want to

mknod /dev/random 1 9

to replace the slow random, I think the current entropy is randomly enough, if urandom is based on the same entropy, and all succeed random numbers are generated based on that entropy, I don't think there'll be any vulnerable.

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