我也是从sublime论坛上转来的一个人的回复，试了一下可行，具体原理请百度。 原回复的链接地址：http://www.sublimetext.com/forum/viewtopic.php?f=3&t=7006&start=10#p41343

回复原文：

This is a dirty fix but at least works. cursor position update also supported. Use LD_PRELOAD to reimplement gtk_im_context_set_client_window and set im focus in. use “gdk_region_get_clipbox” to catch the caret position. (It’s really difficult to find which function can catch the position….) Here I made a assumption that the caret width is always 2, since it is 2. the height is the “font glyph height”.

注意：这种方法貌似是必须安装基于fctix的输入法才行！

  1. 把下面代码保存到C文件里，文件名sublime_imfix.c（自己命名也行，注意把下面步骤中的文件名替换成自己的）。 
    /*
sublime-imfix.c
Use LD_PRELOAD to interpose some function to fix sublime input method support for linux.
By Cjacker Huang <jianzhong.huang at i-soft.com.cn>
gcc -shared -o libsublime-imfix.so sublime_imfix.c  `pkg-config --libs --cflags gtk+-2.0` -fPIC
LD_PRELOAD=./libsublime-imfix.so sublime_text
*/
#include <gtk/gtk.h>
#include <gdk/gdkx.h>
typedef GdkSegment GdkRegionBox;
struct _GdkRegion
{
  long size;
  long numRects;
  GdkRegionBox *rects;
  GdkRegionBox extents;
};
GtkIMContext *local_context;
void
gdk_region_get_clipbox (const GdkRegion *region,
        GdkRectangle    *rectangle)
{
  g_return_if_fail (region != NULL);
  g_return_if_fail (rectangle != NULL);
  rectangle->x = region->extents.x1;
  rectangle->y = region->extents.y1;
  rectangle->width = region->extents.x2 - region->extents.x1;
  rectangle->height = region->extents.y2 - region->extents.y1;
  GdkRectangle rect;
  rect.x = rectangle->x;
  rect.y = rectangle->y;
  rect.width = 0;
  rect.height = rectangle->height; 
  //The caret width is 2; 
  //Maybe sometimes we will make a mistake, but for most of the time, it should be the caret.
  if(rectangle->width == 2 && GTK_IS_IM_CONTEXT(local_context)) {
    gtk_im_context_set_cursor_location(local_context, rectangle);
  }
}
//this is needed, for example, if you input something in file dialog and return back the edit area
//context will lost, so here we set it again.
static GdkFilterReturn event_filter (GdkXEvent *xevent, GdkEvent *event, gpointer im_context)
{
XEvent *xev = (XEvent *)xevent;
if(xev->type == KeyRelease && GTK_IS_IM_CONTEXT(im_context)) {
   GdkWindow * win = g_object_get_data(G_OBJECT(im_context),"window");
   if(GDK_IS_WINDOW(win))
     gtk_im_context_set_client_window(im_context, win);
}
return GDK_FILTER_CONTINUE;
}
void gtk_im_context_set_client_window (GtkIMContext *context,
      GdkWindow    *window)
{
  GtkIMContextClass *klass;
  g_return_if_fail (GTK_IS_IM_CONTEXT (context));
  klass = GTK_IM_CONTEXT_GET_CLASS (context);
  if (klass->set_client_window)
klass->set_client_window (context, window);
  if(!GDK_IS_WINDOW (window))
return;
  g_object_set_data(G_OBJECT(context),"window",window);
  int width = gdk_window_get_width(window);
  int height = gdk_window_get_height(window);
  if(width != 0 && height !=0) {
gtk_im_context_focus_in(context);
local_context = context;
  }
  gdk_window_add_filter (window, event_filter, context); 
}
  2. 编译共享库文件，命令如下（注意更换成自己的文件名和目录）： 
    gcc -shared -o libsublime-imfix.so sublime_imfix.c  `pkg-config --libs --cflags gtk+-2.0` -fPIC

    注意：如果没有安装gtk+-2请安装后再执行，编译需要用到gtk+-2的库和头文件（PS：我把编译命令换成了用gtk+-3貌似不行，如果可以的你成功了的话请告诉我！），安装gtk+-2命令如下：

    sudo apt-get install gtk+-2
  3. 加LD_PRELOAD执行Sublime（PS：我搜了一下原理，LD_PRELOAD预加载的库把正常的动态链接库地址给覆盖了，这个解决方案相当于用的是HACK的方式，所以作者会说是个dirty fix，详细请百度）： 
    LD_PRELOAD=PATH/TO/libsublime-imfix.so PATH/TO/sublime_text
#PATH/TO 是你相应文件的目录

补充： 为了方便使用，建议还是添加个桌面快捷方式，修改或者添加一个桌面的快捷方式，添加快捷方式的方法我就不再赘述了，一百度一大把，关键是修改.desktop文件的Exec这一句为下面这句话：

Exec=/usr/bin/env LD_PRELOAD=PATH/TO/libsublime-imfix.so PATH/TO/sublime_text
# PATH/TO 是你相应文件的目录