I've just updated for SLES12 SP1 to SP2 and my console video no longer works.

The system starts correctly, grub displays the boot menu correctly in graphics mode and starts.
Then the screen goes blank and the monitor goes to sleep.

However, the system is working since I can use VNC to access it.

The system log is displaying many many copies of the following:
2017-02-13T08:23:31.329803-08:00 FIJI kernel: [ 374.002087] [TTM] radeon 0000:01:06.0: Unable to get page 0
2017-02-13T08:23:31.329804-08:00 FIJI kernel: [ 374.002094] [TTM] radeon 0000:01:06.0: Failed to fill cached dma32 pool (r:-12)!
2017-02-13T08:23:31.329805-08:00 FIJI kernel: [ 374.002118] [drm:radeon_gem_object_create [radeon]] *ERROR* Failed to allocate GEM object (249856, 2, 4096, -12)

The output from 'lspci'
/sbin/lspci -nnk | grep VGA -A2
01:06.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] ES1000 [1002:515e] (rev 02)
Subsystem: Super Micro Computer Inc Device [15d9:1511]
Kernel driver in use: radeon

I've tried 'nomodeset' and that just gives me the command line console at boot.
The video has been working without problem for all of SLES11 and SLES12 SP1.
Any suggestions on what to try?



Note: output from hwinfo

hwinfo --gfxcard
29: PCI 106.0: 0300 VGA compatible controller (VGA)
[Created at pci.378]
Unique ID: zsAr.MprrWRTPK04
Parent ID: H0_h.k+eI0bksT96
SysFS ID: /devices/pci0000:00/0000:00:06.0/0000:01:06.0
SysFS BusID: 0000:01:06.0
Hardware Class: graphics card
Model: "ATI ES1000 515E"
Vendor: pci 0x1002 "ATI Technologies Inc"
Device: pci 0x515e "ES1000 515E"
SubVendor: pci 0x15d9 "Super Micro Computer Inc"
SubDevice: pci 0x1511
Revision: 0x02
Driver: "radeon"
Driver Modules: "drm"
Memory Range: 0xf0000000-0xf7ffffff (ro,non-prefetchable)
I/O Ports: 0xc000-0xcfff (rw)
Memory Range: 0xfe9f0000-0xfe9fffff (rw,non-prefetchable)
Memory Range: 0xfe9c0000-0xfe9dffff (ro,non-prefetchable,disabled)
IRQ: 17 (606 events)
I/O Ports: 0x3c0-0x3df (rw)
Module Alias: "pci:v00001002d0000515Esv000015D9sd00001511bc03sc0 0i00"
Driver Info #0:
XFree86 v4 Server Module: radeon
Config Status: cfg=new, avail=yes, need=no, active=unknown
Attached to: #12 (PCI bridge)

Primary display adapter: #29