On Tuesday, January 20, 2009 11:22 am Linus Torvalds wrote: > So just looking at the Xorg.0.log after rebooting, I can tell that the > failure looks to be around the time when we do the DRI mapping. A > successful suspend-resume cycle will look like: > > ... > (WW) intel(0): PRB0_CTL (0x0001f001) indicates ring buffer enabled > (WW) intel(0): Existing errors found in hardware state. > (II) intel(0): using SSC reference clock of 100 MHz > (II) intel(0): Selecting standard 18 bit TMDS pixel format. > (II) intel(0): Output configuration: > (II) intel(0): Pipe A is off > (II) intel(0): Display plane A is now disabled and connected to pipe A. > (II) intel(0): Pipe B is on > (II) intel(0): Display plane B is now enabled and connected to pipe B. > (II) intel(0): Output VGA is connected to pipe none > (II) intel(0): Output LVDS is connected to pipe B > (II) intel(0): [drm] mapped front buffer at 0xd1000000, handle = > 0xd1000000 (II) intel(0): [drm] mapped back buffer at 0xd0c00000, handle = > 0xd0c00000 (II) intel(0): [drm] mapped depth buffer at 0xd0800000, handle = > 0xd0800000 (II) intel(0): RandR 1.2 enabled, ignore the following RandR > disabled message. ... > > and an unsuccessful one will always get stuck before it logs that "[drm] > mapped front buffer" thing, but after doing the "Output LVDS is connected > to pipe B". I checked a couple of times - the log always ended at that > same place. > > No interesting kernel logs survive this thing (and it's obviously in > graphics mode, so I can't see any oops if any), so I can't tell what > happens. But it looks DRI-related. > > And btw, I was wrong - it's not always on the second suspend. It's > happened on the first suspends too. Hm it's probably not display programming related then... Sounds like the i830_update_dri_buffers() call is failing for some reason. The kernel driver does do some I/O mapping stuff at enter/leavevt time (and therefore suspend/resume time), can you reproduce the issue just by VT switching? If so you might be able to see something useful in the kernel log... -- Jesse Barnes, Intel Open Source Technology Center -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
