I have a fresh Ubuntu 12.04.3 LTS installation and at first everything worked fine. 2 days and approximately 10-15 reboots after the initial installation I started experiencing this "blank screen, blinking cursor in upper left corner" problem with increasing density. After another 2-3 days and a numer of reboots I could only get this blank screen.

I followed the fix / workaround suggested in comment #95 and so far I have not experienced the problem once, i.e. no problems in rouhly a week and another 15-20 reboots.

For those working with the issue, below is a list of my HW.

H/W path        Device      Class          Description
======================================================
                            system         MS-7823 (To be filled by O.E.M.)
/0                          bus            Z87M-G43 (MS-7823)
/0/0                        memory         64KiB BIOS
/0/3d                       processor      Intel(R) Core(TM) i5-4430 CPU @ 3.00GHz
/0/3d/3e                    memory         1MiB L2 cache
/0/3d/3f                    memory         256KiB L1 cache
/0/3d/40                    memory         6MiB L3 cache
/0/41                       memory         8GiB System Memory
/0/41/0                     memory         8GiB DIMM DDR3 Synchronous 1600 MHz (0.6 ns)
/0/41/1                     memory         DIMM [empty]
/0/41/2                     memory         DIMM [empty]
/0/41/3                     memory         DIMM [empty]
/0/100                      bridge         4th Gen Core Processor DRAM Controller
/0/100/2                    display        Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller
/0/100/3                    multimedia     Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller
/0/100/14                   bus            8 Series/C220 Series Chipset Family USB xHCI
/0/100/16                   communication  8 Series/C220 Series Chipset Family MEI Controller #1
/0/100/1a                   bus            8 Series/C220 Series Chipset Family USB EHCI #2
/0/100/1b                   multimedia     8 Series/C220 Series Chipset High Definition Audio Controller
/0/100/1c                   bridge         8 Series/C220 Series Chipset Family PCI Express Root Port #1
/0/100/1c.4                 bridge         8 Series/C220 Series Chipset Family PCI Express Root Port #5
/0/100/1c.4/0   eth0        network        RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
/0/100/1d                   bus            8 Series/C220 Series Chipset Family USB EHCI #1
/0/100/1f                   bridge         Z87 Express LPC Controller
/0/100/1f.2                 storage        8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode]
/0/100/1f.3                 bus            8 Series/C220 Series Chipset Family SMBus Controller
/0/1            scsi0       storage        
/0/1/0.0.0      /dev/sda    disk           240GB KINGSTON SV300S3
/0/1/0.0.0/1    /dev/sda1   volume         100MiB Windows NTFS volume
/0/1/0.0.0/2    /dev/sda2   volume         112GiB Windows NTFS volume
/0/1/0.0.0/3    /dev/sda3   volume         111GiB Extended partition
/0/1/0.0.0/3/5  /dev/sda5   volume         103GiB Linux filesystem partition
/0/1/0.0.0/3/6  /dev/sda6   volume         8069MiB Linux swap / Solaris partition
/0/2            scsi1       storage        
/0/2/0.0.0      /dev/sdb    disk           2TB WDC WD2002FAEX-0
/0/2/0.0.0/1    /dev/sdb1   volume         1023GiB Extended partition
/0/2/0.0.0/1/5  /dev/sdb5   volume         895GiB HPFS/NTFS partition
/0/2/0.0.0/1/6  /dev/sdb6   volume         63GiB Linux filesystem partition
/0/2/0.0.0/1/7  /dev/sdb7   volume         63GiB Linux filesystem partition
/0/3            scsi2       storage        
/0/3/0.0.0      /dev/cdrom  disk           BW-16D1HT
/0/4            scsi6       storage        
/0/4/0.0.0      /dev/sdc    disk           STORAGE DEVICE
/0/4/0.0.0/0    /dev/sdc    disk           
/1                          power          To Be Filled By O.E.M.