Category Archives: X11

Dual GPU notebook configuration Intel + AMD/ATI

Add catalyst + xorg114 pacman repos to your /etc/pacman.conf:

Server =$arch
Server =$arch

Install required xorg server and driver packages:


Create /etc/X11/xorg.conf using aticonfig –initial

Section "ServerLayout"
        Identifier     "aticonfig Layout"
        Screen      0  "aticonfig-Screen[0]-0" 0 0
Section "Module"
Section "Monitor"
        Identifier   "aticonfig-Monitor[0]-0"
        Option      "VendorName" "ATI Proprietary Driver"
        Option      "ModelName" "Generic Autodetecting Monitor"
        Option      "DPMS" "true"
Section "Device"
        Identifier  "aticonfig-Device[0]-0"
        Driver      "fglrx"
        BusID       "PCI:1:0:0"
Section "Screen"
        Identifier "aticonfig-Screen[0]-0"
        Device     "aticonfig-Device[0]-0"
        Monitor    "aticonfig-Monitor[0]-0"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Depth     24

Switch gpu using the AMD tool: amdcccle

Direct rendering works: glxinfo | grep direct

direct rendering: Yes


If glxgears / glxinfo gives errors like:

libGL error: failed to load driver: i965
libGL error: Try again with LIBGL_DEBUG=verbose for more details.
libGL error: failed to load driver: swrast
libGL error: Try again with LIBGL_DEBUG=verbose for more details.

… set the catalyst libGL path:

export LIBGL_DRIVERS_PATH=/usr/lib/catalystpxp/fglrx/
export LD_PRELOAD=/usr/lib/catalystpxp/fglrx/

OpenCL works: clinfo

Number of platforms:                             1
  Platform Profile:                              FULL_PROFILE
  Platform Version:                              OpenCL 1.2 AMD-APP (1348.4)
  Platform Name:                                 AMD Accelerated Parallel Processing
  Platform Vendor:                               Advanced Micro Devices, Inc.
  Platform Extensions:                           cl_khr_icd cl_amd_event_callback cl_amd_offline_devices
  Platform Name:                                 AMD Accelerated Parallel Processing
Number of devices:                               2
  Device Type:                                   CL_DEVICE_TYPE_GPU
  Device ID:                                     4098
  Board name:                                    AMD Radeon HD 8600/8700M
  Device Topology:                               PCI[ B#1, D#0, F#0 ]
  Max compute units:                             6
  Max work items dimensions:                     3
    Max work items[0]:                           256
    Max work items[1]:                           256
    Max work items[2]:                           256
  Max work group size:                           256
  Preferred vector width char:                   4
  Preferred vector width short:                  2
  Preferred vector width int:                    1
  Preferred vector width long:                   1
  Preferred vector width float:                  1
  Preferred vector width double:                 1
  Native vector width char:                      4
  Native vector width short:                     2
  Native vector width int:                       1
  Native vector width long:                      1
  Native vector width float:                     1
  Native vector width double:                    1
  Max clock frequency:                           825Mhz
  Address bits:                                  32
  Max memory allocation:                         1073741824
  Image support:                                 Yes
  Max number of images read arguments:           128
  Max number of images write arguments:          8
  Max image 2D width:                            16384
  Max image 2D height:                           16384
  Max image 3D width:                            2048
  Max image 3D height:                           2048
  Max image 3D depth:                            2048
  Max samplers within kernel:                    16
  Max size of kernel argument:                   1024
  Alignment (bits) of base address:              2048
  Minimum alignment (bytes) for any datatype:    128
  Single precision floating point capability
    Denorms:                                     No
    Quiet NaNs:                                  Yes
    Round to nearest even:                       Yes
    Round to zero:                               Yes
    Round to +ve and infinity:                   Yes
    IEEE754-2008 fused multiply-add:             Yes
  Cache type:                                    Read/Write
  Cache line size:                               64
  Cache size:                                    16384
  Global memory size:                            2009071616
  Constant buffer size:                          65536
  Max number of constant args:                   8
  Local memory type:                             Scratchpad
  Local memory size:                             32768
  Kernel Preferred work group size multiple:     64
  Error correction support:                      0
  Unified memory for Host and Device:            0
  Profiling timer resolution:                    1
  Device endianess:                              Little
  Available:                                     Yes
  Compiler available:                            Yes
  Execution capabilities:                                
    Execute OpenCL kernels:                      Yes
    Execute native function:                     No
  Queue properties:                              
    Out-of-Order:                                No
    Profiling :                                  Yes
  Platform ID:                                   0x00007f33cbfb54c0
  Name:                                          Oland
  Vendor:                                        Advanced Micro Devices, Inc.
  Device OpenCL C version:                       OpenCL C 1.2 
  Driver version:                                1348.4 (VM)
  Profile:                                       FULL_PROFILE
  Version:                                       OpenCL 1.2 AMD-APP (1348.4)
  Extensions:                                    cl_khr_fp64 cl_amd_fp64 cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_int64_base_atomics cl_khr_int64_extended_atomics cl_khr_3d_image_writes cl_khr_byte_addressable_store cl_khr_gl_sharing cl_ext_atomic_counters_32 cl_amd_device_attribute_query cl_amd_vec3 cl_amd_printf cl_amd_media_ops cl_amd_media_ops2 cl_amd_popcnt cl_khr_image2d_from_buffer

DOGE mining also works with cgminer-gpu from AUR with 55Kh/s at intensity 10:

cgminer version 3.7.2 - Started: [2014-01-16 18:39:45]
 (5s):54.25K (avg):48.66Kh/s | A:64  R:0  HW:0  WU:42.1/m
 ST: 2  SS: 0  NB: 3  LW: 19  GF: 0  RF: 0
 Connected to xxx diff 16 with stratum as user xxx
 Block: daa10059...  Diff:505  Started: [18:39:58]  Best share: 97
 [P]ool management [G]PU management [S]ettings [D]isplay options [Q]uit
 GPU 0:                | 54.25K/48.66Kh/s | A:64 R:0 HW:0 WU: 42.1/m I:10
 [2014-01-16 18:39:44] Started cgminer 3.7.2
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Using synaptics Touchpad via hal

When reinstalling my notebook, I wanted the Xorg-Server to use the event based device system, but also have the advantage of the synaptics driver.

Easiest approach to realize that, is using the hardware abstraction layer to detect X11 input devices.

First of all we need evdev and synaptics as input devices, as well as the hal and dbus useflag in our make.conf.


USE="${USE} hal dbus"
INPUT_DEVICES="synaptics evdev"

Now remerge the xorg-packages if use flags have changed:

emerge -uNDav --oneshot xorg-drivers xorg-server

Although they should start automatically, it’s no bad idea to add hald and dbus to a runlevel.

rc-update add hald boot
rc-update add dbus boot

Next step is to tell hal what to do with input devices. Fortunatelly gentoo ships predefined rules we can copy:

cp /usr/share/hal/fdi/policy/10osvendor/{10-x11-input.fdi,11-x11-synaptics.fdi} /etc/hal/fdi/policy/

These two files define the X11 options for every detected keyboard, mouse and synaptics touchpad. If you want your old xorg configuration, it’s necessary to rewrite the Options of your xorg.conf input related sections into these files.

For example to activate clicking by tapping for the synaptics touchpad, the line

Option "TapButton1" "1"

of the xorg.conf will now move to 11-x11-synaptics.fdi:

<merge key="input.x11_options.TapButton1" type="string">1</merge>

Anyhow, on my system this tweak didn’t work correctly, so i had to add a little startup script:


synclient TapButton1=1
syndaemon -i1 -k -t -d

Don’t forget to make it executable:

chmod a+x ~/.kde4/Autostart/synaptics

If you’re not using kde4, you may place these lines in your ~/.xinitrc

Note: syndaemon is a utility that locks the touchpad while typing, feel free to leave this line out if you don’t like that.

Now comes the fun part, commenting out every input related section of the xorg.conf, because all this is now managed by hald. In my case, the new /etc/X11/xorg.conf looks like this:

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0"
#    InputDevice    "Keyboard0" "CoreKeyboard"
#    InputDevice    "Mouse0" "CorePointer"
    Option "AllowEmptyInput" "true"
#Section "InputDevice"
#    # generated from data in "/etc/conf.d/gpm"
#    Identifier     "Mouse0"
#    Driver         "mouse"
#    Option         "Protocol" "ImPS/2"
#    Option         "Device" "/dev/input/mice"
#    Option         "Emulate3Buttons" "no"
#    Option         "ZAxisMapping" "4 5"

#Section "InputDevice"
#    # generated from default
#    Identifier     "Keyboard0"
#    Driver         "evdev"
#    Option         "XkbModel"   "pc105"
#    Option         "XkbLayout"  "de"
#    Option         "XkbVariant" "nodeadkeys"
#    Option         "AutoRepeat" "500 30"

I had some strange results when starting X the first time, so i set the “AllowEmptyInput” Option, that fixed it for me.

That’s it. Now reboot and enjoy.

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