Version: (using KDE 4.3.0) OS: Linux Installed from: SuSE RPMs I enabled Sharpen desktop effect. When I apply the settings I get a notification in kde 4.3 notification area informing that Sharpen Desktop effect could not be activated. This happened only after I upgraded to kde 4.3, it used to work until kde 4.2.
Does your GPU/driver provide shader support? -> enter "glxinfo | grep -i shader" into konsole. An empty output means a lack of shader support. You cannot use the sharpen effect in this case (and could not - the new notice just fixed a bug in this case)
Here is the output as you requested in above comment: OpenSuse>glxinfo | grep -i shader GL_ARB_fragment_program, GL_ARB_fragment_shader, GL_ARB_half_float_pixel, GL_ARB_shader_objects, GL_ARB_shading_language_100, GL_ARB_shadow, GL_ARB_vertex_buffer_object, GL_ARB_vertex_program, GL_ARB_vertex_shader, GL_ATI_fragment_shader, GL_ATI_meminfo, GL_ATI_separate_stencil, OpenSuse> Let me know if you need any more information.
can you please do a "glxinfo | grep -i version" and a "glxinfo | grep -i framebuffer". This should provide all necessary information.
Here it is: OpenSuse>glxinfo | grep -i version server glx version string: 1.2 client glx version string: 1.4 OpenGL version string: 2.1.7537 Release glu version: 1.3 OpenSuse>glxinfo | grep -i framebuffer GL_EXT_draw_range_elements, GL_EXT_fog_coord, GL_EXT_framebuffer_blit, GL_EXT_framebuffer_multisample, GL_EXT_framebuffer_object, OpenSuse>
As it's an Ati card, it's a duplicate. The duplicate bug has some information on how you might get shader support back. *** This bug has been marked as a duplicate of bug 173556 ***