Based on kernel version 3.0.4. Page generated on 2011-10-03 22:07 EST.
1 <refentry id="vidioc-log-status"> 2 <refmeta> 3 <refentrytitle>ioctl VIDIOC_LOG_STATUS</refentrytitle> 4 &manvol; 5 </refmeta> 6 7 <refnamediv> 8 <refname>VIDIOC_LOG_STATUS</refname> 9 <refpurpose>Log driver status information</refpurpose> 10 </refnamediv> 11 12 <refsynopsisdiv> 13 <funcsynopsis> 14 <funcprototype> 15 <funcdef>int <function>ioctl</function></funcdef> 16 <paramdef>int <parameter>fd</parameter></paramdef> 17 <paramdef>int <parameter>request</parameter></paramdef> 18 </funcprototype> 19 </funcsynopsis> 20 </refsynopsisdiv> 21 22 <refsect1> 23 <title>Description</title> 24 25 <para>As the video/audio devices become more complicated it 26 becomes harder to debug problems. When this ioctl is called the driver 27 will output the current device status to the kernel log. This is 28 particular useful when dealing with problems like no sound, no video 29 and incorrectly tuned channels. Also many modern devices autodetect 30 video and audio standards and this ioctl will report what the device 31 thinks what the standard is. Mismatches may give an indication where 32 the problem is.</para> 33 34 <para>This ioctl is optional and not all drivers support it. It 35 was introduced in Linux 2.6.15.</para> 36 </refsect1> 37 38 <refsect1> 39 &return-value; 40 41 <variablelist> 42 <varlistentry> 43 <term><errorcode>EINVAL</errorcode></term> 44 <listitem> 45 <para>The driver does not support this ioctl.</para> 46 </listitem> 47 </varlistentry> 48 </variablelist> 49 </refsect1> 50 </refentry> 51 52 <!-- 53 Local Variables: 54 mode: sgml 55 sgml-parent-document: "v4l2.sgml" 56 indent-tabs-mode: nil 57 End: 58 -->
