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slackware:fixes [2006/04/14 13:44] – created alienslackware:fixes [2006/09/29 19:30] – Add section about using Samba without CUPS server alien
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 ===== Fixes for annoyances in Slackware ===== ===== Fixes for annoyances in Slackware =====
  
-==== USB scanner ====+==== USB scanner and hotplug ====
  
-When you have a USB scanner attached to your computer when it boots, and the computer uses //hotplug// to initialize your hardware, you will probably see something similar to the following message: <box 99% black> +When you have a USB scanner attached to your computer when it boots, and the computer uses //hotplug// to initialize your hardware, you will probably see something similar to the following message: <code>
-<code>+
 chown: cannot access `/proc/bus/usb/001/005': No such file or directory chown: cannot access `/proc/bus/usb/001/005': No such file or directory
-chmod: cannot access `/proc/bus/usb/001/005': No such file or directory </code> +chmod: cannot access `/proc/bus/usb/001/005': No such file or directory 
-</box> +</code> When you plug in your USB scanner //after// the computer has already booted up, the error does not appear and scanning works for non-root users. It is annoying to have to unplug the scanner before booting in order to be able to scan as a non-root user. Here's a fix. 
-This is due to an error in the ''/etc/hotplug/usb.rc'' script that can be repaired easily. Look for the following line in  ''/etc/hotplug/usb.rc'' and change that line to + 
 +The problem is due to an error in the ''/etc/hotplug/usb.rc'' script, but that can be repaired easily. Look for the following line in  ''/etc/hotplug/usb.rc'' <code> 
 +devbus=$( ( echo -n 000 ; cat $devlink/../../devnum ) | grep -o ...\$ ) 
 +</code> and change that line to <code> 
 +devbus=$( ( echo -n 000`echo $devlink| sed 's/^.*usb\([0-9]\+\)\/.*$/\1/'` ) | grep -o ...\$ ) 
 +</code> 
 +After this change, either reboot the computer or restart hotplug: <code>/etc/rc.d/rc.hotplug restart 
 +</code> Now, the correct permissions and ownership are applied to the device file. 
 +<note tip> Remember to add yourself to the ''scanner'' group if you want to use your scanner as a non-root user! You can use the ''vigr'' command to add your name to the ''scanner'' group, but if you're uncomfortable with directly editing the system files, here is a one-liner to add user 'geek' to group 'scanner' (replace 'geek' with your own account name): <code> 
 +usermod -G $(id -Gn geek | tr ' ' ','),scanner geek 
 +</code> If the group scanner does not exist, simply create it using the command <code>groupadd scanner</code> 
 +</note> 
 + 
 +---------------- 
 + 
 +==== ALSA OSS sequencer not loaded ==== 
 + 
 +In Slackware 10.2, the ALSA OSS-compatible sequencer module is not loaded. This results in missing device files ''/dev/midi'' and ''/dev/sequencer''.\\ 
 +Edit the file ''/etc/rc.d/rc.alsa'' and look for the function <code> 
 +load_alsa_oss_modules() { 
 +  if ! cat /proc/modules | grep -wq snd-pcm-oss ; then 
 +    if ! cat /proc/modules | grep -wq snd_pcm_oss ; then 
 +      echo "Loading OSS compatibility modules for ALSA." 
 +      modprobe snd-pcm-oss 
 +      modprobe snd-mixer-oss 
 +}</code> Add the following line after the line ''modprobe snd-mixer-oss'' in that function: <code> 
 +      modprobe snd-seq-oss 
 +</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>

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