> Could you please do another test, to verify that screen is > not > configuring the serial port any differently with or without > ,n,8,1. > You don't need to connect the two laptops together, just use > the one > you use as the serial terminal. The test uses the stty > program to > display the serial port configuration.
Here you are. However I need to have the the 2 XOs connected because without it /dev/ttyUSB0 does not exist and if I connect just the adapter then stty fails with resource busy $ screen /dev/ttyUSB0 115200 ********* Today the output was readable! :-? ******** [screen is terminating] [olpc@xo-74-39-1a ~]$ stty --all < /dev/ttyUSB0 speed 115200 baud; rows 0; columns 0; line = 0; intr = ^C; quit = ^\; erase = ^?; kill = ^H; eof = ^D; eol = <undef>; eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W; lnext = ^V; flush = ^O; min = 100; time = 2; -parenb -parodd cs8 -hupcl -cstopb cread clocal -crtscts -ignbrk brkint ignpar -parmrk -inpck -istrip -inlcr -igncr -icrnl ixon -ixoff -iuclc -ixany -imaxbel -iutf8 -opost -olcuc -ocrnl -onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0 -isig -icanon iexten -echo echoe echok -echonl -noflsh -xcase -tostop -echoprt echoctl echoke $ screen /dev/ttyUSB0 115200,n,8,1 [screen is terminating] [olpc@xo-74-39-1a ~]$ stty --all < /dev/ttyUSB0 speed 115200 baud; rows 0; columns 0; line = 0; intr = ^C; quit = ^\; erase = ^?; kill = ^H; eof = ^D; eol = <undef>; eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W; lnext = ^V; flush = ^O; min = 100; time = 2; -parenb -parodd cs8 -hupcl -cstopb cread clocal -crtscts -ignbrk brkint ignpar -parmrk -inpck -istrip -inlcr -igncr -icrnl ixon -ixoff -iuclc -ixany -imaxbel -iutf8 -opost -olcuc -ocrnl -onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0 -isig -icanon iexten -echo echoe echok -echonl -noflsh -xcase -tostop -echoprt echoctl echoke [olpc@xo-74-39-1a ~]$ screen /dev/ttyUSB0 9600,n,8,1 ******HERE I get the "questionmark in back diamond" output****** [screen is terminating] [olpc@xo-74-39-1a ~]$ stty --all < /dev/ttyUSB0 speed 9600 baud; rows 0; columns 0; line = 0; intr = ^C; quit = ^\; erase = ^?; kill = ^H; eof = ^D; eol = <undef>; eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W; lnext = ^V; flush = ^O; min = 100; time = 2; -parenb -parodd cs8 -hupcl -cstopb cread clocal -crtscts -ignbrk brkint ignpar -parmrk -inpck -istrip -inlcr -igncr -icrnl ixon -ixoff -iuclc -ixany -imaxbel -iutf8 -opost -olcuc -ocrnl -onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0 -isig -icanon iexten -echo echoe echok -echonl -noflsh -xcase -tostop -echoprt echoctl echoke _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel