On Thu, Feb 26, 2009 at 09:48:22PM -0800, Derek Zhou wrote: > On Thursday 26 February 2009 05:09:27 pm James Cameron wrote: > > > Something is wrong with my olpc in either the xserver or hardware. For > > > other non-drawing tasks its speed seems to be reasonable. > > > > Yes, something is wrong. Have you another XO you can test? > > > I installed latest > xserver-xorg-video-geode_2.11.0-0.3_i386.deb > from: > http://lunge.mit.edu/~dilinger/debxo-0.5/ > It got slightly faster, like 10% but the situation is still roughly > the same. I don't think it is the JFFS2 as top shows most of the cpu > time is spent in the Xorg process.
Only some of the JFFS2 problems manifest as CPU time spent in kernel threads. > A couple of suspicious things: > 1, /proc/meminfo shows MemTotal: 221776KB Can someone confirm whether > this is normal? Looks normal to me. > 2, Console (without X) is also quite slow. I know fbcon can be slow > and unlike x terminal it is synchronous so it has to draw every char > literally but still I didn't expect it to be this slow. That excludes X as the primary cause. It suggests a shortage of CPU cycles. > 3, every once in a while (10 mins or so) there is a message in console like: > JFFS2 warning: jffs2_sum_write_sumnode: Not enough space for summary, > padsize=-60 That matches a known problem. The JFFS2 filesystem is in a suboptimal state. > 4, dmesg is flooded with thing like: > [ 1950.351880] olpc-ec: received 0xe3 > [ 1950.351880] olpc-ec: received 0xc2 > [ 1950.352019] olpc-ec: running cmd 0x15 > [ 1950.353035] olpc-ec: received 0x41 That is probably unrelated, and the fragment looks normal. The EC does not use the JFFS2. > I could also reflesh debxo0.5 or latest joyride build to try. Is there > anyway I can build a set of dat/img files from my current nand so I > can come back easily? Not at the moment. This requires save-nand support for partitioned NAND, and I checked with Mitch a few days ago on IRC and he said it was not yet available. I *think* a save-nand to USB disk will work, but I don't know if a copy-nand from it will work. I'll give it a go. If you wish to save your configuration changes, take a copy of the whole of /etc, and "dpkg --get-selections", and anything else you may have changed. -- James Cameron mailto:qu...@us.netrek.org http://quozl.netrek.org/ _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel