Comment 2 for bug 765850

The following is ltrace output.

ltrace xrandr -o left
__libc_start_main(0x804bc40, 3, 0xbfe1ed24, 0x80511c0, 0x8051220 <unfinished ...>
strcmp("--rate", "-o") = -1
strcmp("--refresh", "-o") = -1
strcmp("--version", "-o") = -1
strcmp("--screen", "-o") = -1
strcmp("--query", "-o") = -1
strtol(0xbfe20368, 0xbfe1ebd4, 10, 0xb783ac85, 5) = 0
strcmp("normal", "left") = 1
strcmp("left", "left") = 0
XOpenDisplay(NULL) = 0x09382008
XRRQueryExtension(0x9382008, 0xbfe1ebec, 0xbfe1ebe8, 0xb783ac85, 5) = 1
XRRQueryVersion(0x9382008, 0xbfe1ebdc, 0xbfe1ebd8, 0xb783ac85, 5) = 1
XRRGetScreenInfo(0x9382008, 637, 0xbfe1ebd8, 0xb783ac85, 5) = 0x938f6b8
XRRConfigCurrentConfiguration(0x938f6b8, 0xbfe1ebfa, 0xbfe1ebd8, 0xb783ac85, 5) = 29
XRRConfigSizes(0x938f6b8, 0xbfe1ebf4, 0xbfe1ebd8, 0xb783ac85, 5) = 0x938f6e4
XRRConfigCurrentRate(0x938f6b8, 0xbfe1ebf4, 0xbfe1ebd8, 0xb783ac85, 5) = 51
XRRConfigRotations(0x938f6b8, 0xbfe1ebfa, 0xbfe1ebd8, 0xb783ac85, 5) = 1
XSelectInput(0x9382008, 637, 131072, 0xb783ac85, 5) = 1
XRRSelectInput(0x9382008, 637, 1, 0xb783ac85, 5) = 0
XRRSetScreenConfigAndRate(0x9382008, 0x938f6b8, 637, 29, 2X Error of failed request: BadMatch (invalid parameter attributes)
  Major opcode of failed request: 154 (RANDR)
  Minor opcode of failed request: 2 (RRSetScreenConfig)
  Serial number of failed request: 14
  Current serial number in output stream: 14
 <unfinished ...>
+++ exited (status 1) +++