> I regularly test Intel graphics on a Core 2/i965 laptop but your chipset > is > even older than that. > > The drm/i915 driver wasn't updated in one step from 4.2 to 4.4. You could > try > to use git to bisect which particular set of changes broke it. We then > would > have more chances to find out what is going wrong. > > Another thing you could try is to update to DragonFly master where the > driver > has once again be updated. With luck you could have better results. > > -- > Francois Tigeot > Hi Francois, I upgraded to Dragonfly master (now running DragonFly v4.5.0.443.gf6fab-DEVELOPMENT) and installed xf86-video-intel29 from dports. The problem still persists unfortunately.
There is a slight difference in the error description logged in /var/log/messages , but apart from that the behaviour is the same, the screen blanks out and the computer must be power cycled. Feb 7 14:46:50 scabb kernel: info: [drm] failed to find VBIOS tables Feb 7 14:46:50 scabb kernel: tunable drm.video.VGA-1 is not set Feb 7 14:46:51 scabb kernel: vblank wait timed out on crtc 1 Feb 7 14:46:51 scabb kernel: MAPPABLE_END VS END 0000000010000000 0000000010000000 Feb 3 21:58:38 scabb kernel: info: [drm] failed to find VBIOS tables Feb 3 21:58:38 scabb kernel: looking up kenv for "drm.video.vga1" Feb 3 21:58:38 scabb kernel: didn't find value for kenv drm.video.vga1 Feb 3 21:58:38 scabb kernel: MAPPABLE_END VS END 0000000010000000 0000000010000000 Not an issue for me anyway, I am happy to use the VESA driver. Thanks for the suggestion.
