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authorFrancis Rowe <info@gluglug.org.uk>2015-07-11 18:10:56 (EDT)
committer Francis Rowe <info@gluglug.org.uk>2015-07-11 18:10:56 (EDT)
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docs/gnulinux/encrypted_trisquel.html: Troubleshooting
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<div class="section">
+ <h1 id="troubleshooting">Troubleshooting</h1>
+
+ <p>
+ A user reported issues when booting with a docking station attached
+ on an X200, when decrypting the disk in GRUB. The error
+ <i>AHCI transfer timed out</i> was observed. The workaround
+ was to remove the docking station.
+ </p>
+
+ <p>
+ Further investigation revealed that it was the DVD drive causing problems.
+ Removing that worked around the issue.
+ </p>
+
+<pre>
+
+&quot;sudo wodim -prcap&quot; shows information about the drive:
+Device was not specified. Trying to find an appropriate drive...
+Detected CD-R drive: /dev/sr0
+Using /dev/cdrom of unknown capabilities
+Device type : Removable CD-ROM
+Version : 5
+Response Format: 2
+Capabilities :
+Vendor_info : 'HL-DT-ST'
+Identification : 'DVDRAM GU10N '
+Revision : 'MX05'
+Device seems to be: Generic mmc2 DVD-R/DVD-RW.
+
+Drive capabilities, per MMC-3 page 2A:
+
+ Does read CD-R media
+ Does write CD-R media
+ Does read CD-RW media
+ Does write CD-RW media
+ Does read DVD-ROM media
+ Does read DVD-R media
+ Does write DVD-R media
+ Does read DVD-RAM media
+ Does write DVD-RAM media
+ Does support test writing
+
+ Does read Mode 2 Form 1 blocks
+ Does read Mode 2 Form 2 blocks
+ Does read digital audio blocks
+ Does restart non-streamed digital audio reads accurately
+ Does support Buffer-Underrun-Free recording
+ Does read multi-session CDs
+ Does read fixed-packet CD media using Method 2
+ Does not read CD bar code
+ Does not read R-W subcode information
+ Does read raw P-W subcode data from lead in
+ Does return CD media catalog number
+ Does return CD ISRC information
+ Does support C2 error pointers
+ Does not deliver composite A/V data
+
+ Does play audio CDs
+ Number of volume control levels: 256
+ Does support individual volume control setting for each channel
+ Does support independent mute setting for each channel
+ Does not support digital output on port 1
+ Does not support digital output on port 2
+
+ Loading mechanism type: tray
+ Does support ejection of CD via START/STOP command
+ Does not lock media on power up via prevent jumper
+ Does allow media to be locked in the drive via PREVENT/ALLOW command
+ Is not currently in a media-locked state
+ Does not support changing side of disk
+ Does not have load-empty-slot-in-changer feature
+ Does not support Individual Disk Present feature
+
+ Maximum read speed: 4234 kB/s (CD 24x, DVD 3x)
+ Current read speed: 4234 kB/s (CD 24x, DVD 3x)
+ Maximum write speed: 4234 kB/s (CD 24x, DVD 3x)
+ Current write speed: 4234 kB/s (CD 24x, DVD 3x)
+ Rotational control selected: CLV/PCAV
+ Buffer size in KB: 1024
+ Copy management revision supported: 1
+ Number of supported write speeds: 4
+ Write speed # 0: 4234 kB/s CLV/PCAV (CD 24x, DVD 3x)
+ Write speed # 1: 2822 kB/s CLV/PCAV (CD 16x, DVD 2x)
+ Write speed # 2: 1764 kB/s CLV/PCAV (CD 10x, DVD 1x)
+ Write speed # 3: 706 kB/s CLV/PCAV (CD 4x, DVD 0x)
+
+Supported CD-RW media types according to MMC-4 feature 0x37:
+ Does write multi speed CD-RW media
+ Does write high speed CD-RW media
+ Does write ultra high speed CD-RW media
+ Does not write ultra high speed+ CD-RW media
+
+</pre>
+
+ </div>
+
+ <div class="section">
+
<p>
Copyright &copy; 2014, 2015 Francis Rowe &lt;info@gluglug.org.uk&gt;<br/>
Permission is granted to copy, distribute and/or modify this document