> There are some kernel messages showing up before it hangs, > but they don't get written to the log because of the ide > issues. I'm going to see if I can dump them to a usb flash > drive. Ok, I managed to grab some of the messages (manually, since everything was so locked up). ----- ... ohci_hcd 0000:00:02.0: wakeup ohci_hcd 0000:00:02.1: wakeup Restarting tasks... done ACPI: Power Button (FF) [PWRF] ACPI: Power Button (CM) [PWRB] hda: dma_timer_expiry: dma status == 0x21 ----- > I've tried sysrq without success, but this is probably > because the video is locked up. Maybe sysrq over a serial > console - is this possible with the stock Fedora kernels? > I got a serial console going by adding the kernel parameter 'console=ttyS0'. Unfortunately, this doesn't survive the suspend, no matter whether ide dma is enabled or not, which suggests ide dma may not be the root cause. On that topic, I have been reading through LKML about nforce2 issues. About 2 years ago (kernels around 2.6.0 to 2.6.7), there was a problem with system lockups with a lot of the same symptoms. This was eventually traced to a timing issue in the nforce2 chipset connected to the "C1 disconnect" power management features. (Search for: nforce2 apic c1halt). As far as I know, there was no ACPI suspend support around at that time, so I'm wondering if this problem is being unmasked again by the ACPI suspend/resume code. Ken -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
