On Fri, 30 Jan 2009 21:03:52 PST, Andrew Morton said: > On Thu, 29 Jan 2009 11:25:43 -0500 Valdis.Kletnieks@xxxxxx wrote: > > > On Wed, 28 Jan 2009 02:19:09 PST, akpm@xxxxxxxxxxxxxxxxxxxx said: > > > The mm-of-the-moment snapshot 2009-01-28-02-17 has been uploaded to > > > http://userweb.kernel.org/~akpm/mmotm/ > > % ls -l /sys/devices/platform/dock.0/docked > > -r--r--r-- 1 root root 4096 2009-01-29 10:49 /sys/devices/platform/dock.0/docked > > % cat /sys/devices/platform/dock.0/docked > > =F1=DEcat: write error: Bad address > > > > strace of the cat shows: > > > > open("/sys/devices/platform/dock.0/docked", O_RDONLY) = 3 > > fstat(3, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0 > > read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 1812586496 > > Under 2.6.29-rc2-mmotm0116, this would return either "0" or "1", not 4K > > of nulls. > Is it due to > > acpi-dock-dont-eval-_sta-on-every-show_docked-sysfs-read.patch Bingo. Reverting that patch and the sysfs-read-simplified.patch fixed it. So obviously something in there doesn't agree with the innards of my laptop - Dell Latitude D820, BIOS is A09 (current), if that helps anybody...
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