attached dmesg ( dmesg >~/dmesg_2018-05-22.txt )
this COULD be the key bit - unsure (thanks to well_laid_down in #xubuntu)
[488956.180193] [drm:cypress_dpm_set_power_state [radeon]] *ERROR* rv770_restrict_performance_levels_before_switch failed [488957.778128] traps: light-locker[9579] trap int3 ip:7f228a785c41 sp:7ffdee1a6c50 error:0 in libglib-2.0.so.0.5600.1[7f228a734000+113000]
( dmesg file is unedited, contains other crash info i believe unreleated; but may contain detail on the same problem yesterday morning )
attached dmesg ( dmesg >~/dmesg_ 2018-05- 22.txt )
this COULD be the key bit - unsure (thanks to well_laid_down in #xubuntu)
[488956.180193] [drm:cypress_ dpm_set_ power_state [radeon]] *ERROR* rv770_restrict_ performance_ levels_ before_ switch failed 2.0.so. 0.5600. 1[7f228a734000+ 113000]
[488957.778128] traps: light-locker[9579] trap int3 ip:7f228a785c41 sp:7ffdee1a6c50 error:0 in libglib-
( dmesg file is unedited, contains other crash info i believe unreleated; but may contain detail on the same problem yesterday morning )