I have a weird problem lately:My system only boots if either a CD is inserted (any CD, not a specific CD(*)) or if I enter UEFI-BIOS before boot.Otherwise, grub2 would start but afterwards the screen stays black.The last thing I did before this problem occured (at least I think this was the last thing) was adding partitions on /dev/sdb and /dev/sdc, generating a raid-1 out of these two partitions and adding the RAID to /etc/mdadm/mdadm.conf and /etc/fstab.My boot-device however is /dev/sda (I have a EFI-partition on /dev/sda1)If that helps: I run Debian Wheezy (but also have some packages from experimental).How can I locate the error and solve it?(*) I tried the following CDs:A Debian Wheezy Live DVD (actually a DVD, not a CD) => System bootedA Mini CD which came with my WiFi-Router (so to say a driver CD) => System bootedAnother driver CD that came with my printer ages ago => System bootedA music CD (Vive la Fte - Rpublique Populaire, but I'm quite convinced that doesn't matter) => System didn't bootIt looks like all data CDs work...[edit]here's my dmesg file (with inserted CD)http://pastebin.com/cxvv0Hqemaybe that helps!?
System boots only with CD inserted
boot;grub2;debian
I have solved??? the problem.Well I don't really have a solution, as I couldn't identify the reason for the problem. However, the last 2 boots went well without a CD inserted and without entering the BIOS.What I did was the following:I installed the package firmware-realtek as dmesg -T -l err,crit,alert,emerg showed me that the realtek firmware was missing.I updated my system withaptitude updateaptitude upgradeaptitude dist-upgradeNow it seems like the problem is gone...