AnsweredAssumed Answered

new HD7970 loses GPU Device

Question asked by kbrafford on May 1, 2012
Latest reply on Oct 26, 2012 by pbcpbt

I have a new HD7970, and after awhile the GPU device disappears from the OpenCL device list.  Here's what clinfo says when that happens:


Number of platforms:                             1
  Platform Profile:                              FULL_PROFILE
  Platform Version:                              OpenCL 1.2 AMD-APP (923.1)
  Platform Name:                                 AMD Accelerated Parallel Proces
  Platform Vendor:                               Advanced Micro Devices, Inc.
  Platform Extensions:                           cl_khr_icd cl_amd_event_callbac
k cl_amd_offline_devices cl_khr_d3d10_sharing

  Platform Name:                                 AMD Accelerated Parallel Proces
Number of devices:                               1
  Device Type:                                   CL_DEVICE_TYPE_CPU
  Device ID:                                     4098
  Board name:
  Max compute units:                             4
  Max work items dimensions:                     3
    Max work items[0]:                           1024
    Max work items[1]:                           1024
    Max work items[2]:                           1024
  Max work group size:                           1024
  Preferred vector width char:                   16
  Preferred vector width short:                  8
  Preferred vector width int:                    4
  Preferred vector width long:                   2
  Preferred vector width float:                  4
  Preferred vector width double:                 0
  Native vector width char:                      16
  Native vector width short:                     8
  Native vector width int:                       4
  Native vector width long:                      2
  Native vector width float:                     4
  Native vector width double:                    0
  Max clock frequency:                           3010Mhz
  Address bits:                                  64
  Max memory allocation:                         2147483648
  Image support:                                 Yes
  Max number of images read arguments:           128
  Max number of images write arguments:          8
  Max image 2D width:                            8192
  Max image 2D height:                           8192
  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:                   4096
  Alignment (bits) of base address:              1024
  Minimum alignment (bytes) for any datatype:    128
  Single precision floating point capability
    Denorms:                                     Yes
    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:                                    65536
  Global memory size:                            8581414912
  Constant buffer size:                          65536
  Max number of constant args:                   8
  Local memory type:                             Global
  Local memory size:                             32768
  Kernel Preferred work group size multiple:     1
  Error correction support:                      0
  Unified memory for Host and Device:            1
  Profiling timer resolution:                    340
  Device endianess:                              Little
  Available:                                     Yes
  Compiler available:                            Yes
  Execution capabilities:
    Execute OpenCL kernels:                      Yes
    Execute native function:                     Yes
  Queue properties:
    Out-of-Order:                                No
    Profiling :                                  Yes
  Platform ID:                                   000007FED9012A08
  Name:                                          AMD Phenom(tm) II X4 940 Proces
  Vendor:                                        AuthenticAMD
  Device OpenCL C version:                       OpenCL C 1.2
  Driver version:                                2.0 (sse2)
  Profile:                                       FULL_PROFILE
  Version:                                       OpenCL 1.2 AMD-APP (923.1)
  Extensions:                                    cl_khr_fp64 cl_amd_fp64 cl_khr_
global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int3
2_base_atomics cl_khr_local_int32_extended_atomics cl_khr_int64_base_atomics cl_
khr_int64_extended_atomics cl_khr_byte_addressable_store cl_khr_gl_sharing cl_ex
t_device_fission cl_amd_device_attribute_query cl_amd_vec3 cl_amd_printf cl_amd_
media_ops cl_amd_popcnt cl_khr_d3d10_sharing


It doesn't do this upon a fresh reboot.  It's only after some amount of time that at some point, the GPU is just gone. 


Also (maybe related?) the machine now sometimes doesn't let me wake it back up after it has turned off the monitors.  I have found that with the new Radeon drivers for the new card that I have to disable the "turn off monitors" in the Power settings for the computer to keep working when I leave it alone for a few hours.


Any idea what's going on?


--Keith Brafford