I’m using OpenSuse 13.1 and installed OSMC via osmcinstaller.
Both RC1 and RC2 didn’t work for RaspberryPi1 and RaspberryPi2.
The program itself was started as root (normal user didn’t have rights anyway).
Currently what I did and because of what I managed to start the installation.
this is to show what device name the usb stick has (i’m using micro sd card inside usb 2.0 adapter)
# fdisk -l
Device Boot Start End Blocks Id System
/dev/sdb1 * 2048 31291391 15644672 c W95 FAT32 (LBA)
Then remade the partition
# fdisk /dev/sdb
Command (m for help): p
Device Boot Start End Blocks Id System
/dev/sdb1 * 2048 31291391 15644672 c W95 FAT32 (LBA)
Command (m for help): d
Selected partition 1
Partition 1 is deleted
Command (m for help): n
This part meant hitting enter couple of times 
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p):
Using default response p
Partition number (1-4, default 1):
First sector (2048-31291391, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-31291391, default 31291391):
Using default value 31291391
Partition 1 of type Linux and of size 14.9 GiB is set
Command (m for help): a
Selected partition 1
Command (m for help): p
Disk /dev/sdb: 16.0 GB, 16021192704 bytes, 31291392 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000b7709
Device Boot Start End Blocks Id System
/dev/sdb1 * 2048 31291391 15644672 83 Linux
Command (m for help): t
Selected partition 1
Hex code (type L to list all codes): c
WARNING: If you have created or modified any DOS 6.xpartitions, please see the fdisk manual page for additionalinformation.
Changed type of partition 'Linux' to 'W95 FAT32 (LBA)'
Command (m for help): p
Disk /dev/sdb: 16.0 GB, 16021192704 bytes, 31291392 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000b7709
Device Boot Start End Blocks Id System
/dev/sdb1 * 2048 31291391 15644672 c W95 FAT32 (LBA)
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
# mkfs.msdos -F 32 /dev/sdb1 -n Verbatim
mkfs.fat 3.0.22 (2013-07-19)
Now I wrote the image to usb. Didn’t use the installer this time.
# dd bs=4M if=OSMC_TGT_rbp2_20150412.img of=/dev/sdb
# sync
… and now finally I got it to work.
For me this setup seemed to work.
Edit: This solution worked for both RPi1 and RPi2. The coolest part is that my “most-probably-DOA” microSD cards work also perfectly 
