Hi guys,

I compiled my own 2.6.10 kernel for Debian Sarge and I have full support for my hardware from the kernel, but I can't seem to be able to adjust the gamma of my monitor (contrast). After much reading it seems that the problem is the x-server: it comes with the i810 driver and not the i830 driver that supports Intel's Extreme Graphics 852GM chipset. Does anyone know how to go around this? The screen looks a little bit too bright right now and the KDE desktop panel is almost white.

Specs:
Toshiba Satellite A40, kernel 2.6.10-6 compiled from Debian Sid's source, 852GM video chipset w/ 64MBs of video memory. glxinfo output:
name of display: :0.0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.2
server glx extensions:
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_EXT_import_context
client glx vendor string: SGI
client glx version string: 1.2
client glx extensions:
GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context,
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_allocate_memory,
GLX_MESA_swap_control, GLX_MESA_swap_frame_usage, GLX_OML_swap_method,
GLX_OML_sync_control, GLX_SGI_make_current_read, GLX_SGI_swap_control,
GLX_SGI_video_sync, GLX_SGIS_multisample, GLX_SGIX_fbconfig,
GLX_SGIX_visual_select_group
GLX extensions:
GLX_ARB_get_proc_address, GLX_EXT_import_context, GLX_EXT_visual_info,
GLX_EXT_visual_rating, GLX_SGIX_visual_select_group
OpenGL vendor string: Tungsten Graphics, Inc
OpenGL renderer string: Mesa DRI Intel(R) 852GM/855GM 20021115
OpenGL version string: 1.2 Mesa 4.0.4
OpenGL extensions:
GL_ARB_imaging, GL_ARB_multitexture, GL_ARB_texture_env_add,
GL_ARB_texture_env_combine, GL_ARB_transpose_matrix, GL_EXT_abgr,
GL_EXT_bgra, GL_EXT_blend_color, GL_EXT_blend_func_separate,
GL_EXT_blend_minmax, GL_EXT_blend_subtract, GL_EXT_clip_volume_hint,
GL_EXT_convolution, GL_EXT_compiled_vertex_array, GL_EXT_fog_coord,
GL_EXT_histogram, GL_EXT_packed_pixels, GL_EXT_polygon_offset,
GL_EXT_rescale_normal, GL_EXT_secondary_color, GL_EXT_texture3D,
GL_EXT_texture_env_add, GL_EXT_texture_env_combine, GL_EXT_texture_object,
GL_EXT_texture_lod_bias, GL_EXT_vertex_array, GL_IBM_rasterpos_clip,
GL_MESA_window_pos, GL_NV_texgen_reflection, GL_SGI_color_matrix,
GL_SGI_color_table
glu version: 1.3
glu extensions:
GLU_EXT_nurbs_tessellator, GLU_EXT_object_space_tess

visual x bf lv rg d st colorbuffer ax dp st accumbuffer ms cav
id dep cl sp sz l ci b ro r g b a bf th cl r g b a ns b eat
----------------------------------------------------------------------
0x22 24 tc 1 24 0 r y . 8 8 8 0 0 0 0 0 0 0 0 0 0 None
0x23 24 tc 1 24 0 r . . 8 8 8 0 0 0 0 0 0 0 0 0 0 None
0x24 24 tc 1 24 0 r y . 8 8 8 0 0 24 8 0 0 0 0 0 0 None
0x25 24 tc 1 24 0 r . . 8 8 8 0 0 24 8 0 0 0 0 0 0 None
0x26 24 tc 1 24 0 r y . 8 8 8 0 0 0 0 16 16 16 0 0 0 Slow
0x27 24 tc 1 24 0 r . . 8 8 8 0 0 0 0 16 16 16 0 0 0 Slow
0x28 24 tc 1 24 0 r y . 8 8 8 0 0 24 8 16 16 16 0 0 0 Slow
0x29 24 tc 1 24 0 r . . 8 8 8 0 0 24 8 16 16 16 0 0 0 Slow

Any help would be appreciated.

Regards,
Max

from what i read and studied, there is no gamma adjustment for the i810 X11 drivers yet. It's an annoying problem for me also, since it's what's keeping me from playing games on Linux.

There is gamma option that you can include in the X line while loading gdm, xdm, kdm, startx, etc...

You are using software 3D rendering. If you do play games, it is going to be choppy.

Contrast is not gamma. Gamma is whole different spec.