Special Forums Hardware Dell XPS M1330 doesn't detect optical drive Post 303041989 by milhan on Tuesday 10th of December 2019 11:25:45 AM
Dell XPS M1330 doesn't detect optical drive

I have a Dell XPS M1330 laptop. The OS is Windows 10. I had to replace the motherboard because it was bad. After replacing the motherboard I noticed the optical (DVD/CD) drive is neither detected in BIOS and OS nor making any noise at all. Everything else seems to be working fine. The optical drive was working before I replaced the motherboard. So I removed the optical drive and the connector cable and cleaned the cable and the pins on the optical drive with a toothbrush and put the laptop back and booted. This time I could hear the optical drive making noise right after I boot. When I tried to insert a CD it accepted the CD and I can hear it spinning. However, the DVD/CD drive is still not listed in BIOS nor in the OS. In the BIOS, it says "none" for fixed bay device. The DVD/CD drive is not listed in the boot menu either when I press F12 to select a boot device.

What does this tell you?
Test Your Knowledge in Computers #9
Difficulty: Easy
A CD-ROM is a type of optical disc that originated in 1982 in South Korea.
True or False?

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HAL-DISABLE-POLLING(1)					      General Commands Manual					    HAL-DISABLE-POLLING(1)

hal-disable-polling - disable polling on drives with removable media SYNOPSIS
hal-disable-polling [options] DESCRIPTION
hal-disable-polling can be used to to disable and enable media detection on drives with removable storage. For more information about both the big picture and specific HAL properties, refer to the HAL spec which can be found in /usr/local/share/doc/hal/spec/hal-spec.html depending on the distribution. OPTIONS
The following options are supported: --udi The UDI (Unique Device Identifier) of the device object. --device The device file of the drive. --enable-polling Enable polling instead of disabling it. --help Print out usage. --version Print the version. NOTES
This program requires super user privileges. RETURN VALUE
If the requested operation was successful, this program will exit with exit code 0. HISTORY
Polling a storage drive is a necessary evil to detect when the user inserts or removes media. Human computer interaction studies have shown that a broad class of users expect their system to react within a few seconds of this. Thus, the hald daemon polls through the hald-addon- storage addon (one instance for each drive with removable media). The purpose of the hald-addon-storage addon is simply to open the special device file at a regular interval (either every 2 or every 16 seconds) to check for new media. This program tries to open the device file using the O_EXCL option which means that programs like cdrecord(1) that uses O_EXCL automatically prevents the hald-addon-storage for interferring by continously opening the device file. In addition, if the drive is locked using HAL (see hal-lock(1)) the addon also stops polling. Unfortunately, polling a storage drive can have adverse side effects if the hardware and/or device driver for the hardware is malfunction- ing. Additionally, the operating system kernel itself may offer multiple interfaces for the same device (e.g. /dev/sg0 and /dev/scd0) so even O_EXCL won't work. Also, polling a drive may decrease throughput in certain (odd and/or broken) configurations; for example, if two IDE drives shares the same host (master/slave), bus traffic and contention caused by polling e.g. the optical drive (slave) can reduce throughput to the hard disk (master) and/or interfere with CD burning on another optical drive (master). Finally, polling a drive incurs an overhead both in the host system (processes get woken up often, preventing the CPU to stay in a deep power saving states) and it may pre- vent the actual drive from reaching deep power states as well. As a result, more power is consumed and this affects battery life for lap- tops. Despite the existence of support for asynchronous media change notification in recent MMC (Multi-Media Commands) specifications, virtually no optical drives are compliant with the specification. Fortunately newer SATA ATAPI hardware seems to support Asynchronous Notification (AN) and at this time of writing (March 2007) work is underway to make both the Linux operating system kernel and HAL take advantage of this. It is the position of the HAL team that polling should be avoided at all costs as long as it doesn't heavily impact the user experience in a negative way. This tool is provided as a stop-gap measure to use if a system is rendered useless due to bugs in drivers and/or hardware that is provoked by HAL polling the drive. If such a bug is encountered it should be reported (see the BUGS section below) so it can be fixed - historically hald have triggered a number of bugs in Linux storage drivers and related subsystems (such as USB) that have later been fixed. BUGS
Please send bug reports to either the distribution or the HAL mailing list, see http://lists.freedesktop.org/mailman/listinfo/hal on how to subscribe. SEE ALSO
hald(8), lshal(1), hal-lock(1), open(2), http://www.t10.org/scsi-3.htm, https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=halpolling AUTHOR
Written by David Zeuthen <david@fubar.dk> with a lot of help from many others. HAL-DISABLE-POLLING(1)

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