<p>As I looked at your bootchart, I assume you should search for hardware problems.</p>
<p><code>kblockd</code> and <code>async</code> are both processes for controlling I/O of block devices. Propably one of your block devices is corrupt and lets your linux stop booting.</p>
<p>The boot log shows similar hints:</p>
<pre><code>[ 106.005524] sr 0:0:1:0: [sr0] Sense Key : Illegal Request [current]
[ 106.005530] sr 0:0:1:0: [sr0] Add. Sense: Illegal mode for this track
[ 106.005537] sr 0:0:1:0: [sr0] CDB: Read(10): 28 00 00 00 00 00 00 00 02 00
[ 106.005546] end_request: I/O error, dev sr0, sector 0
</code></pre>
<p>(Line 501 ff)</p>
<p>Line 445 shows, what <code>sr0</code> is: A SCSI attached CD drive:</p>
<pre><code>[ 93.998132] sr0: scsi3-mmc drive: 16x/48x cd/rw xa/form2 cdda tray
</code></pre>
<p>Try the following:</p>
<ol>
<li>Detach your CD drive.</li>
<li>Boot again.</li>
</ol>
<p>Good luck!</p>
