The bug doesn't seem to be related to drm, at least on my machine : - I switched to console, stopped gdm (and thus X) and unloaded drm kernel module. - echo 1 >> /sys/power/pm_trace ; /etc/acpi/sleep.sh force - machine suspended successfully - on resume, hard drive led blincked a few times, but console screen never appeared, caps lock didn't work, nor SysRQ…
this happens on -6 intrepid kernel, -7 is currently downloading. I will test with it and post a new comment here. I don't think recompiling a kernel will help me, as I can't get any output from the kernel anyway when it crashes… ** Description changed: - Kernel version 2.6.27-4, having the drm module loaded results in suspend + Kernel version 2.6.27-4, having the drm module loaded results in resume (90% of the time) not returning from suspend. Going into Xorg.conf and disabling acceleration is not enough on its own to prevent the hang, you have to ensure the drm module itself is not loaded, even if it is not in use. This bug can be confirmed for all versions of the Intrepid kernels (my hardware only runs on intrepid) with the exception of the linux-rt kernel, which suspends prefectly with DRM. The crash happens after X is brought back up and tasks are being resumed. The mouse cursor is displayed but cannot be moved, the machine is entirely non-responsive to everything. This is not just hung video, the kernel is completely down. No kernel oops is displayed. Log files only show a successful suspend and then the eventual boot after the cold restart. Occasionally (depending on how quickly tasks resume I guess) some of the post resume scripts get to run. I added touch commands to each of them so I could trace them and it gets through a semi-random number of them each time. Occasionally it will even get through all of them before the hard lock. The hard lock does not itself seem to be in pm-utils and its scripts, but rather inside drm in some sort. System Specs: Thinkpad T500 Intel Core 2 Duo @ 2.4GHz 3GB RAM Intel X4500HD integrated video using i915.ko running latest intrepid as of Sep 25. -- DRM Breaks Resume from Suspend https://bugs.launchpad.net/bugs/274278 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
