On Mon, 16 Feb 2009, Marc MERLIN wrote: > Were you able to find any config options that don't look good to you? Sorry, no :( But you have some heavy duty debugging stuff that you should disable if you don't use them, like kprobes. I'd also disable cgroup and the group scheduler if you don't use them. > Similarly, I have a nagging but annoying problem where my laptop will > occasionally hard deadlock when I plug the power back in while it was > running on batteries. If you are using either nVidia or ATI proprietary drivers (sorry, I forgot the details), they react to power management events like AC connected/disconnected, and so I suppose a bug there might cause hangs. If it is a hard-to-hit race, the hangs would not happen very often. I don't think the open drivers do this (i.e. they're not advanced enough for that yet :p), though. Maybe Intel's do, they're big on the PM stuff. The X.org server also wants to listen to acpi events nowadays (and does so, probably through HAL), so it gets difficult to know for sure what might be reacting to the AC connected event and causing a hang. It could also be the BIOS fighting X.org. Try telling the BIOS to not touch the screen brightness level when you plug/unplug AC, and see if that stops the hangs... > I just upgraded to 2.6.28.4 so we'll see what happens, but if you have > recommendations on kernel options, debugging, or other ideas, I'm all ears. > (like can I debug on usb serial, or do I need real serial?) No idea, sorry :( Never tried it over serial, let alone usb-serial. I'd expect a real serial to work better, but the only way to know for sure is to try. There is a hideous hack to log data to the RTC (will scramble the time, though, so it is not good if you cannot reproduce the problem easily as you cannot really have that thing enabled all the time) that does work almost always. > > I take it that usb-serial won't work, but I think the docking station has > > serial on it. I might be able to borrow one. > > If I do and do serial console, would I get some output on that serial port > > at resume time you think? Here, when I last needed to use an ethernet console, it did work enough to get the data. But it was on 2.6.21 or thereabouts :( -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ ibm-acpi-devel mailing list ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
