Comment 0 for bug 619663

Created an attachment (id=36239)
xorg log

System Environment:
Arch: i386
Platform: pineview
Libdrm: (master)2.4.21
Mesa: (7.8)mesa_7_6_1_rc1-5913-g1f756d916a48393ce4ff7c284193e48a510c175b
Xserver: (server-1.8-branch)xorg-server-1.8.1
Xf86_video_intel: (master)2.11.0-169-g5a0a8a1cf6d9b0616d6a097e783f2aa318b45736
Kernel: (master)e40152ee1e1c7a63f4777791863215e3faa37a86

Bug detailed description:
On extended mode, when width exceed 2048, error message is reported:
 (EE) intel(0): Failed to allocate framebuffer.
  X Error of failed request: BadMatch (invalid parameter attributes)
  Major opcode of failed request: 148 (RANDR)
  Minor opcode of failed request: 7 (RRSetScreenSize)
  Serial number of failed request: 28
  Current serial number in output stream: 29

Reproduce steps:
1. xrandr --output LVDS1 --mode 1024x600
2. xrandr --output VGA1 --mode 1280x1024
3. xrandr --output LVDS1 --left-of VGA1