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154 Part II . Running the Show floppy 65712 0 sg 36120 0 scsi_mod 124600 1 sg parport_pc 39724 0 parport 47336 1 parport_pc ext3 128424 2 jbd 86040 1 ext3 This output shows a variety of modules that have been loaded on a Linux system, including several to support the ALSA sound system, some of which provide OSS compatibility (snd_seq_oss). To find information about any of the loaded modules, use the modinfo command. For example, you could type the following: # modinfo -d snd-seq-oss OSS-compatible sequencer module Not all modules have descriptions available. In this case, however, the snd-seqoss module is described as an OSS-compatible sequencer module. You can also use the -a option to see the author of the module, or -n to see the object file representing the module. The author information often has the e-mail address of the driver s creator, so you can contact the author if you have problems or questions about it. Loading Modules You can load any module that has been compiled and installed (to the /lib/ modules directory) into your running kernel using the modprobe command. A common reason for loading a module is to use a feature temporarily (such as loading a module to support a special file system on a floppy you want to access). Another reason is to identify a module that will be used by a particular piece of hardware that could not be autodetected. Here is an example of the modprobe command being used to load the parport module, which provides the core functions to share parallel ports with multiple devices: # modprobe parport After parport is loaded, you can load the parport_pc module to define the PC-style ports available through the interface. The parport_pc module lets you optionally define the addresses and IRQ numbers associated with each device sharing the parallel port. For example: # modprobe parport_pc io=0×3bc irq=auto In this example, a device is identified as having an address of 0×3bc, and the IRQ for the device is autodetected.
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152 Part II . Running the Show Figure 4-5: Use SUSE Plugger to respond to inserted media The following settings are available from SUSE Plugger window: . Data CD When a data CD is inserted, a window opens to warn you that a data CD has been inserted. Click Open and the CD opens in the Konqueror window. You can have the contents open with a different application by changing the kfmclient command shown in the SUSE Plugger window. . Audio CD When an audio CD is inserted, a window opens to warn you that a music CD has been inserted. Click Open and start playing the music found on the disk using kscd. You can change to a different audio player by changing the command shown in the SUSE Plugger window. . Blank CD and DVD Discs When a blank CD or DVD is inserted, by default the K3b window opens, ready to begin copying files or burning ISO images to that disk. . Video DVD Discs The Kaffeine video player opens, by default, when you insert a commercial video DVD disk into the DVD drive. When Kaffeine opens, it tells you what components you are missing. SUSE does not include libdvdcss, needed to play commercial movies. . Removable Storage Insert a USB stick or other storage medium and you are asked if you want to open that device. Click Open to have that drive opened in a Konqueror folder. . Digital Camera Connect a digital camera and the contents of the digital camera are displayed in a Konqueror window. You can copy, move, or perform other actions on the images in that directory.
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Chapter 4 . Learning Basic Administration 151 The following settings are available from the Removable Drives and Media Preferences window on the Storage tab: . Removable Storage When a removable drive (such as a USB pen drive) is hot-plugged into the computer, it is automatically mounted, based on the Mount removable drives when hot-plugged option. CDs, DVDs, and other removable media are automatically mounted when inserted, based on the Mount removable media when inserted option You can choose Browse removable media when inserted to have the contents of removable media displayed in a Nautilus file manager window when it s inserted. Choose Auto-run programs on new drives and media to have an autorun program run if it exists on the media. . Blank CD and DVD Discs When a blank CD or DVD is inserted, by default the Nautilus file manager window opens with the burn: options set. You can drag and drop files to this window to back up files to the blank media. The following settings are available from the Removable Drives and Media Preferences window on the Multimedia tab: . Audio CD When an audio CD is inserted, the gnome-cd player opens and starts playing the music found on the disk. You can change to a different audio player by changing the command, or unselect the checkbox next to Play audio CD discs when inserted to not have audio play automatically. . Video DVD Discs No player is started, by default, when you insert a commercial video DVD disk into the DVD drive. By selecting Play video DVD disks when inserted the Totem movie player will open to try to play the DVD. The Totem movie player will not play movie DVDs unless you add extra software to decrypt the DVD. There are legal issues and other movie player options you should look into if you want to play DVD movies from Linux. See Chapter 20 for more information about video players in Linux. . Digital Camera Connect a digital camera and the gThumb Image Viewer (gthum-import command) will open, ready to import digital images from your camera. You can have other commands open the folder of digital images from your camera by replacing the gthum-import command with an image viewer or import application you prefer. Removable Media on a SUSE KDE Desktop Using SUSE from a KDE Desktop, the SUSE Plugger application can be used to set what happens when different types of removable hardware are connected or media are inserted. One way to get to the SUSE Plugger window is to insert a CD or DVD into the drive. When the SUSE Hardware Detection window appears, click Configure to see the SUSE Plugger window, as shown in Figure 4-5. Note
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150 Part II . Running the Show Managing Removable Hardware Linux systems such as SUSE, RHEL, Fedora and others that support full KDE and GNOME desktop environments include simple graphical tools for configuring what happens when you attach popular removable devices to the computer. So, with a KDE or GNOME desktop running, you simply plug in a USB device or insert a CD or DVD and a window may pop up to deal with that device. Although different desktop environments share many of the same underlying mechanisms (Udev, hal, and hotplug) to detect and name removable hardware, they offer different tools for configuring how they are mounted or used. The following sections describe how removable hardware and media are configured, using a GNOME desktop in Fedora and a KDE desktop in SUSE. Removable Media on a Fedora GNOME Desktop The GNOME desktop offered in Fedora Core 4 offers the Removable Drives and Media Preferences window to define happens when you attach removable devices or insert removable media into the computer. From a Fedora Core GNOME desktop, select Desktop.Preferences.Removable Drives and Media to see how your system is configured to handle removable hardware and media. Figure 4-4 shows an example of that window. Figure 4-4: Change removable hardware and media settings in GNOME
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