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slackware:fixes [2006/04/14 14:40]
alien
slackware:fixes [2008/11/18 16:00] (current)
alien Explain about HAL related mount error
Line 35: Line 35:
       modprobe snd-seq-oss       modprobe snd-seq-oss
 </code> and restart ALSA. </code> and restart ALSA.
 +
 +----------------
 +
 +==== Using Samba without installing CUPS ====
 +
 +In Slackware, CUPS is available as the default printing solution, while the old lprNG remains in the "''/pasture''" directory. Some people still prefer the trusted lpr/lpd style of printing and do not install CUPS. However, the Samba package is compiled against the CUPS libraries. Although the necessary CUPS libraries are always installed with the //aaa_elflibs// package, Samba still periodically complains loudly in the ''/var/log/messages'' logfile about the absent CUPS server: <file>
 +smbd[....]: Unable to connect to CUPS server localhost - Connection refused
 +</file>
 +The solution (if you don't need a printing facility in Samba) is to disable printing completely. This is what you need to add to the **''[Global]''** section of your ''/etc/samba/smb.conf'' file: <code>
 +load printers = no
 +printing = bsd
 +printcap name = /dev/null
 +</code>
 +
 +----------------
 +
 +==== Where is mkfs.vfat? ====
 +
 +FAT32 (also known as vfat) partitions are commonly used on USB sticks, and they are also quite useful when you have a dual-boot system with Windows on a NTFS partition on the "other side", and want a shared partition where both OS-es can write files.\\
 +Now, where did that "''mkfs.vfat''" command go, that seems to be available on so many other Linux distributions and is mentioned in lots of Google search results when you try to find out how to format your partition as FAT32 instead of FAT16?
 +
 +The ''mkdosfs'' command aka the ''mkfs.msdos'' command (they're the same command, one is symlinked to the other) which by default creates FAT16 ("//DOS//") partitions, can create these FAT32 partitions as well!\\ Run it with the **''-F32''** switch: <code>
 +mkfs.msdos -F32 /dev/<devicename>
 +</code>
 +
 +----------------
 +
 +==== The bootup messages scroll off my screen too fast ====
 +
 +When your Linux kernel boots, it spits out all kinds of informative messages. When the Slackware init scripts start, you'll get even more messages that scroll across your screen. The kernel logs its messages in a ring buffer that you can display (after login) with the command <code>dmesg</code> If you wait too long with that command, the kernel messages that are logged after the initial boot will erase the beginning of the buffer (it has a limited capacity). You can still read the initial buffer content at your leisure though: it is saved by Slackware in the file ''/var/log/dmesg''.
 +
 +Still, not all of the standard output and standard error from the init scripts is logged to disk. Only when the syslogger is started, will the scripts start logging to ''/var/log/messages'', ''/var/log/syslog'' etc... but you easily miss information if you for instance have a hardware problem. The text scrolls off the screen so quickly that you usually can't properly analyze it (unless your hardware is terribly slow :-)).
 +
 +One trick can save the day: when your computer finsishes booting up and displays the login prompt, you can scroll back by pressing the key combination <key>Shift</key> <key>Page Up</key> repeatedly!\\ You need to use a VESA console though, and not have your system configured for graphical login (runlevel 4).
 +
 +----------------
 +
 +==== "A security policy in place prevents this sender ..." error ====
 +
 +With Slackware 12.0 and onwards, when you are running X Window, and are greeted by the following message when you insert a CD, DVD, or USB stick into the computer: <note warning>
 +A security policy in place prevents this sender from sending this message to this recipient, see message bus configuration file (rejected message had interface "org.freedesktop.Hal.Device.Volume" member "Mount" error name "(unset)" destination "org.freedesktop.Hal")
 +</note> this means that you need to add your user account to the //plugdev// group.\\ 
 +The command to add your account (for example account called //"alien"//) to the group //plugdev// is: <code>
 +gpasswd -a alien plugdev</code> You need to logout and login again in order for this change to have effect.\\ 
 +If you start your computer in runlevel 3 (non-graphical boot) and run ''"groups"'' you will notice that your account seems to be part of the //plugdev// group already. This is true in a sense: Slackware adds your account to this group and several others like cdrom, floppy //dynamically// for the duration of your login session. Unfortunately the DBUS/HAL daemons do not use Linux system calls to check your group membership. Instead, they rely on what is written in the ''/etc/group'' file.
 +
 +This HAL related issue is actually explained in the CHANGES_AND_HINTS.TXT file (here is a link to the Slackware 12.1 version of [[http://slackware.osuosl.org/slackware-12.1/CHANGES_AND_HINTS.TXT|CHANGES_AND_HINTS.TXT]]). Highly recommened reading material, that file!

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