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<div class="document" id="manual-process-for-usb-port-permissions-verification">
<h1 class="title">Manual Process for USB Port Permissions Verification</h1>
<p><strong>1.</strong> Verify device/bus port has correct permission.</p>
<p>Check your USB port permissions.</p>
<p><strong>A.</strong> Open a terminal.</p>
<p>Enter this commmand:</p>
<pre class="literal-block">
lsusb
</pre>
<p>Result:</p>
<pre class="literal-block">
Bus 002 Device 002: ID 046d:c016 Logitech, Inc. M-UV69a Optical Wheel Mouse
Bus 002 Device 001: ID 0000:0000
Bus 003 Device 013: ID 03f0:2312 Hewlett-Packard
</pre>
<p><strong>B.</strong> Check the permission on the directory.</p>
<p>Enter this command:</p>
<pre class="literal-block">
ls -l /dev/bus/usb/003/013
</pre>
<p>This WILL be different on your system, the 003 is the Bus and the 013 is the Device verify from the lsusb output.</p>
<p>Example:</p>
<pre class="literal-block">
ls -l /dev/bus/usb/<bus>/<device>
</pre>
<p>Where from the result from the above 'lsusb' is: Bus 003 Device 013: ID 03f0:2312 Hewlett-Packard
BUS = 003
DEVICE = 013</p>
<p>Hence the command to run would be: ls -l /dev/bus/usb/003/013</p>
<p>Result from ls -l /dev/bus/usb/<bus>/<device>:</p>
<pre class="literal-block">
crw-r-r-- 1 root root 189, 268 2007-05-24 15:20 /dev/bus/usb/003/013
</pre>
<p>The above result will fail. The correct result should be: (notice the crw-rw-r-- permission settings)</p>
<pre class="literal-block">
crw-rw-r-- 1 root root 189, 268 2007-05-24 15:20 /dev/bus/usb/003/013
</pre>
<p>To correct this go to Step 2. Otherwise go to the end of this document.</p>
<p><strong>2.</strong> Update the rules for usb devices.</p>
<p>Use grep to determine the line number and file to be modified.</p>
<p>Enter this command:</p>
<pre class="literal-block">
grep -Hn usb_device /etc/udev/rules.d/*
</pre>
<p>Possible Output:</p>
<pre class="literal-block">
/etc/udev/rules.d/50-udev-default.rules:133:SUBSYSTEM=="usb_device", ACTION=="add", PROGRAM="/bin/sh -c 'K=%k; K=$${K#usbdev}; printf bus/usb/%%03i/%%03i $${K%%%%.*} $${K#*.}'", NAME="%c", MODE="0644"
</pre>
<p>Look for text similar to; SUBSYSTEM=="usb_devices" .......... MODE="0644".</p>
<p>If the usb_devices mode is not set to 0664 then the usb will have incorrect permissions and will not be usable or found by HPLIP</p>
<p>Notice in the above output each line starts with: "/etc/udev/rules.d/50-udev-default.rules". This filename (50-udev-default.rules) could be different on your system. Please note this.
Notice the :number: after the filename, (eg: /etc/udev/rules.d/50- udev-default.rules:133:) this is the line number for where the text is located in the file. Please note this as well.</p>
<p><strong>3.</strong> Edit the /etc/udev/rules.d/50-udev-default.rules file to update the permission settings.</p>
<p>Enter this commmand:</p>
<pre class="literal-block">
su -c 'nano /etc/udev/rules.d/50-udev-default.rules'
</pre>
<p>Or on systems that use sudo run:</p>
<pre class="literal-block">
sudo nano /etc/udev/rules.d/50-udev-default.rules
</pre>
<p>Go to the line number that is applicable (see above), in this case the line number is "133".
Change the "MODE="0644"" TO MODE="0664"</p>
<p>Save the file, and exit. (Control-O, Enter, and then Control-X)</p>
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<center><small>Page last updated: Thu Jun 14 16:07:55 2007; HPLIP Version: 2.8.2</small></center>
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