You are not logged in.
I have the same problem.
sudo cat /var/log/everything.log | grep dvd
Jul 25 23:05:48 localhost kernel: [ 1.597587] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Aug 9 21:27:13 localhost kernel: [ 1.620342] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Aug 14 21:36:00 localhost kernel: [ 1.602162] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Aug 20 21:19:16 localhost kernel: [ 1.602073] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Aug 27 20:31:32 localhost kernel: [ 1.613566] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Aug 27 21:26:03 localhost kernel: [ 1.592060] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Aug 29 20:08:18 localhost kernel: [ 1.584047] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Aug 29 20:12:23 localhost kernel: [ 1.565560] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Aug 29 23:13:32 localhost kernel: [ 1.578513] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Sep 5 17:54:12 localhost kernel: [ 1.569111] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Sep 6 22:02:23 localhost kernel: [ 1.575094] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Sep 7 19:16:01 localhost kernel: [ 1.595403] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Sep 7 19:42:47 localhost kernel: [ 1.590780] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Sep 7 20:25:54 localhost kernel: [ 1.587020] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Sep 10 00:30:22 localhost kernel: [ 1.597202] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Sep 10 00:44:10 localhost kernel: [ 1.588939] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Sep 12 18:02:17 localhost kernel: [ 1.592680] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Sep 14 23:19:36 localhost kernel: [ 1.598505] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Oct 4 05:48:36 localhost kernel: [ 1.585418] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Oct 4 06:30:50 localhost kernel: [ 1.430547] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Oct 4 16:57:36 localhost kernel: [ 1.592359] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Oct 4 20:04:29 localhost kernel: [ 1.595684] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Oct 4 21:21:28 localhost kernel: [ 1.599094] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Oct 4 21:35:54 localhost kernel: [ 1.578527] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Oct 10 16:44:24 localhost kernel: [ 1.678022] sr0: scsi3-mmc drive: 48x/5x writer dvd-ram cd/rw xa/form2 cdda tray
Oct 10 18:41:24 localhost kernel: [ 1.592204] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Oct 10 21:16:56 localhost kernel: [ 1.638959] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Oct 10 21:26:01 localhost kernel: [ 1.655737] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Oct 12 16:59:06 localhost kernel: [ 1.628594] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Oct 14 21:31:18 localhost kernel: [ 1.655514] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
It was OK until Oct 14
ls -l /var/cache/pacman/pkg/linux-3.6*
-rw-r--r-- 1 root root 43919576 Oct 13 13:38 /var/cache/pacman/pkg/linux-3.6.2-1-x86_64.pkg.tar.xz
-rw-r--r-- 1 root root 43966004 Oct 22 18:53 /var/cache/pacman/pkg/linux-3.6.3-1-x86_64.pkg.tar.xz
Not conclusive, but suspicious.
After downgrading kernel to 3.6.2-1 it's available again.
Let me know if there is anything else I can provide.
Offline