SLES12 SP1 to SP2 - ATI ES1000 console video no longer works
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 : 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?