I can confirm partly - for me the serial /dev/ttyS0 is used for the
wacom pen (Thinkpad X60 tablet). After resume from RAM the pen does not
work and "serial" has dissappeared from /proc/interrupts. I tried
creating a /etc/acpi/resume.d/20-setserial.sh containing s setserial
command as suggested by ThinkWiki but that does not help.
The setserial command reports:
/dev/ttyS0, Line 0, UART: undefined, Port: 0x0200, IRQ: 5
Baud_base: 921600, close_delay: 50, divisor: 0
closing_wait: 3000
Flags: spd_normal skip_test
and stty gives:
speed 19200 baud; rows 0; columns 0; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R;
werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 10;
-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
Wacom survives suspend to disk & resume.
I'm currently using linux-image-2.6.20-15-generic version 2.6.20-15.27.
--
Serial port stops working after suspend
https://bugs.launchpad.net/bugs/105380
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