Tom, Am 15.02.2013 um 15:33 schrieb Tom Easterday:
> I decided to start a separate thread to keep my problems out of the general > ones. Whatever the differences are between what was there day before > yesterday and what is there today I don't know, but my machine does not like > it. > I built 12.04 with Xenomai (and the Linuxcnc > rtos-integration-preview3-merged-into-master branch) yesterday on a USB > stick. If I put that stick into my atom D2700MUD and boot it, it runs fine. > I put that stick in another atom D2500HN system and it runs fine. No > graphics problems, no networking problems, no problems getting the grub menu > to come up at boot time, nothing. > > So, rather than fight the several problems I had (that I was posting about > earlier yesterday) I just wiped and reinstalled 12.04 again on my internal > SSD to make sure it wasn't something I did differently from yesterday. That > didn't help. After building everything I have exactly the same problems as > earlier. Again, I want to reiterate that if I plug in the usb stick from > yesterday into this same hardware it runs fine. So either my Ubuntu 12.04 > install - which seems fine before I install the Xenomai kernel - is hosed or > the Xenomai build doesn't get along with my hardware. > > Rather than list all the problems let me just start with the most severe. > Something in the graphics driver for my system is hosed. Attached is > output from dmesg. If you search for "drm:drm_edid_block_valid" > in that file you will see what I see scroll by on my screen just before I get > the Ubuntu desktop. I don't know if that is a clue or not, but I do know > that I have a row of dots across a small section at the top of the Ubuntu > desktop that shouldn't be there (and aren't there in Ubuntu before installing > the Xenomai kernel). Worse is that my machine seems to be running fine and > then the screen will just freeze and I can't do anything on it. > > Today I was able to do some debugging. When the screen froze I was able to > ssh in and look at top. Nothing out of the ordinary is going on. The > processes I had running were all running and nothing was taking cpu or memory > out of the ordinary. I HUP'd Xorg which killed everything but brought the > desktop back up and I was able to log in. Everything ran ok until the next > hang. Lather, rinse, repeat. > > Any suggestions for debugging this? Perhaps I should look into building my > own kernel since the current packages don't like this board? A search of ' [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is' gets 22.000 hits, many of them tagged as 'SOLVED'. A quick scan makes it likely this is an issue with a certain Intel graphics chip set, it is widely known, and there are many proposed solutions, like an option in the X11 configuration. Could you follow up these threads and try them out - I am rather sure it is unrelated to Xenomai, since the very same thing happens with stock Ubuntu kernels for instance. Actually I suggest you install one of the kernels which have been reported to show the problem, and explore the fix there - this would help to narrow down the search. > And as I said, I want to focus on the graphics issue first but I cannot for > the l life of me get the grub boot menu to appear. I have tried all > suggestions with bios legacy usb settings, a different keyboard, nothing > works. And again, it works fine on my build on the usb stick from > yesterday. I have also had the wired network connection quit working half a > dozen times or so now, though today I haven't had that happen... Please edit /etc/default/grub, remove the 'quiet' option, make 'splash' into 'nosplash', and adjust other options as documented, for instance such that the grub display stays on unconditionally for a couple of seconds. Please follow the grub2 documentation, for instance https://help.ubuntu.com/community/Grub2 When done, run 'update-grub' and reboot. - Michael > > -Tom > > > <dmesgs.txt>------------------------------------------------------------------------------ > Free Next-Gen Firewall Hardware Offer > Buy your Sophos next-gen firewall before the end March 2013 > and get the hardware for free! Learn more. > http://p.sf.net/sfu/sophos-d2d-feb_______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers ------------------------------------------------------------------------------ Free Next-Gen Firewall Hardware Offer Buy your Sophos next-gen firewall before the end March 2013 and get the hardware for free! Learn more. http://p.sf.net/sfu/sophos-d2d-feb _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
