Hello Jean On Thu, 25 Nov 2010, Jean Pihet wrote: > On Thu, Nov 25, 2010 at 6:35 PM, Paul Walmsley <paul@xxxxxxxxx> wrote: > > On Thu, 25 Nov 2010, Jean Pihet wrote: > >> On Thu, Nov 25, 2010 at 12:49 AM, Paul Walmsley <paul@xxxxxxxxx> wrote: > >> > > >> > The console semaphore must be held while the OMAP UART devices are > >> > disabled, lest a console write cause an ARM abort (and a kernel crash) > >> > when the underlying console device is inaccessible. These crashes > >> > only occur when the console is on one of the OMAP internal serial > >> > ports. > >> This does not fix the issue for me on Beagle (console on ttyO2). > >> > >> Doing: > >> / # echo 5 > /sys/devices/platform/omap/omap-hsuart.0/sleep_timeout > >> / # echo 5 > /sys/devices/platform/omap/omap-hsuart.1/sleep_timeout > >> / # echo 5 > /sys/devices/platform/omap/omap-hsuart.2/sleep_timeout > >> and waiting 5 seconds hangs the console. > > > > By the way, you write that the above situation "hangs the console." Is it > > just the case that the console dies and the rest of the system is still > > alive, or does the whole system crash? > The console hangs, the rest of the system still runs. Just out of curiosity, if you send a few breaks to the OMAP over serial, does that cause the console to pay attention again? CTRL-A F in minicom. - Paul
