## http://man7.org/linux/man-pages/man3/termios.3.html
## XCASE  (not in POSIX; not supported under Linux)
--- ModemManager-1.4.6/libqcdm/src/com.c
+++ ModemManager-1.4.6.new/libqcdm/src/com.c
@@ -39,7 +39,7 @@
     stbuf.c_iflag &= ~(HUPCL | IUTF8 | IUCLC | ISTRIP | IXON | IXOFF | IXANY | ICRNL);
     stbuf.c_oflag &= ~(OPOST | OCRNL | ONLCR | OLCUC | ONLRET);
     stbuf.c_lflag &= ~(ICANON | ISIG | IEXTEN | ECHO | ECHOE | ECHOK | ECHONL);
-    stbuf.c_lflag &= ~(NOFLSH | XCASE | TOSTOP | ECHOPRT | ECHOCTL | ECHOKE);
+    stbuf.c_lflag &= ~(NOFLSH | TOSTOP | ECHOPRT | ECHOCTL | ECHOKE);
     stbuf.c_cc[VMIN] = 1;
     stbuf.c_cc[VTIME] = 0;
     stbuf.c_cc[VEOF] = 1;
--- ModemManager-1.4.6/libwmc/src/com.c
+++ ModemManager-1.4.6.new/libwmc/src/com.c
@@ -39,7 +39,7 @@
     stbuf.c_iflag &= ~(HUPCL | IUTF8 | IUCLC | ISTRIP | IXON | IXOFF | IXANY | ICRNL);
     stbuf.c_oflag &= ~(OPOST | OCRNL | ONLCR | OLCUC | ONLRET);
     stbuf.c_lflag &= ~(ICANON | ISIG | IEXTEN | ECHO | ECHOE | ECHOK | ECHONL);
-    stbuf.c_lflag &= ~(NOFLSH | XCASE | TOSTOP | ECHOPRT | ECHOCTL | ECHOKE);
+    stbuf.c_lflag &= ~(NOFLSH | TOSTOP | ECHOPRT | ECHOCTL | ECHOKE);
     stbuf.c_cc[VMIN] = 1;
     stbuf.c_cc[VTIME] = 0;
     stbuf.c_cc[VEOF] = 1;
--- ModemManager-1.4.6/src/mm-port-serial.c
+++ ModemManager-1.4.6.new/src/mm-port-serial.c
@@ -455,7 +455,7 @@
 
     stbuf.c_iflag &= ~(IGNCR | ICRNL | IUCLC | INPCK | IXON | IXANY );
     stbuf.c_oflag &= ~(OPOST | OLCUC | OCRNL | ONLCR | ONLRET);
-    stbuf.c_lflag &= ~(ICANON | XCASE | ECHO | ECHOE | ECHONL);
+    stbuf.c_lflag &= ~(ICANON | ECHO | ECHOE | ECHONL);
     stbuf.c_lflag &= ~(ECHO | ECHOE);
     stbuf.c_cc[VMIN] = 1;
     stbuf.c_cc[VTIME] = 0;