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  1. $ uname -a
  2. Linux metric 4.8.0-41-generic #44-Ubuntu SMP Fri Mar 3 15:27:17 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
  3.  
  4. $ sudo lspci | grep VGA
  5. 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]
  6.  
  7. [ 7.228303] [drm] initializing kernel modesetting (VERDE 0x1002:0x683D 0x1043:0x045D 0x00).
  8. [ 7.228327] [drm] register mmio base: 0xFCDC0000
  9. [ 7.228332] [drm] register mmio size: 262144
  10. [ 7.228433] ATOM BIOS: 683D.15.21.0.0.AS01
  11. [ 7.228575] radeon 0000:01:00.0: VRAM: 1024M 0x0000000000000000 - 0x000000003FFFFFFF (1024M used)
  12. [ 7.228582] radeon 0000:01:00.0: GTT: 2048M 0x0000000040000000 - 0x00000000BFFFFFFF
  13. [ 7.228588] [drm] Detected VRAM RAM=1024M, BAR=256M
  14. [ 7.228591] [drm] RAM width 128bits DDR
  15. [ 7.228694] [TTM] Zone kernel: Available graphics memory: 15828162 kiB
  16. [ 7.228703] [TTM] Zone dma32: Available graphics memory: 2097152 kiB
  17. [ 7.228708] [TTM] Initializing pool allocator
  18. [ 7.228724] [TTM] Initializing DMA pool allocator
  19. [ 7.228763] [drm] radeon: 1024M of VRAM memory ready
  20. [ 7.228769] [drm] radeon: 2048M of GTT memory ready.
  21. [ 7.228791] [drm] Loading verde Microcode
  22. [ 7.228968] [drm] Internal thermal controller with fan control
  23. [ 7.229055] [drm] probing gen 2 caps for device 8086:4021 = 4394d02/0
  24. [ 7.235853] [drm] radeon: dpm initialized
  25. [ 7.238026] [drm] Found VCE firmware/feedback version 50.0.1 / 17!
  26. [ 7.238038] [drm] GART: num cpu pages 524288, num gpu pages 524288
  27. [ 7.240889] [drm] probing gen 2 caps for device 8086:4021 = 4394d02/0
  28. [ 7.240901] [drm] PCIE gen 2 link speeds already enabled
  29. [ 7.278757] [drm] PCIE GART of 2048M enabled (table at 0x00000000001D6000).
  30. [ 7.278892] radeon 0000:01:00.0: WB enabled
  31. [ 7.278898] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000040000c00 and cpu addr 0xffff99b5439a9c00
  32. [ 7.278904] radeon 0000:01:00.0: fence driver on ring 1 use gpu addr 0x0000000040000c04 and cpu addr 0xffff99b5439a9c04
  33. [ 7.278911] radeon 0000:01:00.0: fence driver on ring 2 use gpu addr 0x0000000040000c08 and cpu addr 0xffff99b5439a9c08
  34. [ 7.278917] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000040000c0c and cpu addr 0xffff99b5439a9c0c
  35. [ 7.278923] radeon 0000:01:00.0: fence driver on ring 4 use gpu addr 0x0000000040000c10 and cpu addr 0xffff99b5439a9c10
  36. [ 7.279293] radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x0000000000075a18 and cpu addr 0xffffabef44035a18
  37. [ 7.299297] radeon 0000:01:00.0: fence driver on ring 6 use gpu addr 0x0000000040000c18 and cpu addr 0xffff99b5439a9c18
  38. [ 7.299304] radeon 0000:01:00.0: fence driver on ring 7 use gpu addr 0x0000000040000c1c and cpu addr 0xffff99b5439a9c1c
  39. [ 7.299310] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
  40. [ 7.299314] [drm] Driver supports precise vblank timestamp query.
  41. [ 7.299318] radeon 0000:01:00.0: radeon: MSI limited to 32-bit
  42. [ 7.299371] radeon 0000:01:00.0: radeon: using MSI.
  43. [ 7.299405] [drm] radeon: irq initialized.
  44. [ 7.580009] ioc0: LSISAS1068E B3: Capabilities={Initiator}
  45. [ 7.775188] [drm] ring test on 0 succeeded in 1 usecs
  46. [ 7.775201] [drm] ring test on 1 succeeded in 1 usecs
  47. [ 7.775207] [drm] ring test on 2 succeeded in 1 usecs
  48. [ 7.775222] [drm] ring test on 3 succeeded in 9 usecs
  49. [ 7.775230] [drm] ring test on 4 succeeded in 3 usecs
  50. [ 7.950916] [drm] ring test on 5 succeeded in 2 usecs
  51. [ 7.950925] [drm] UVD initialized successfully.
  52. [ 8.060126] [drm] ring test on 6 succeeded in 21 usecs
  53. [ 8.060140] [drm] ring test on 7 succeeded in 3 usecs
  54. [ 8.060143] [drm] VCE initialized successfully.
  55. [ 8.060633] [drm] ib test on ring 0 succeeded in 0 usecs
  56. [ 8.060661] [drm] ib test on ring 1 succeeded in 0 usecs
  57. [ 8.060688] [drm] ib test on ring 2 succeeded in 0 usecs
  58. [ 8.060765] [drm] ib test on ring 3 succeeded in 0 usecs
  59. [ 8.060813] [drm] ib test on ring 4 succeeded in 0 usecs
  60. [ 8.672035] floppy0: no floppy controllers found
  61. [ 8.736038] [drm] ib test on ring 5 succeeded
  62. [ 9.248037] [drm] ib test on ring 6 succeeded
  63. [ 9.760024] [drm] ib test on ring 7 succeeded
  64. [ 9.761065] [drm] Radeon Display Connectors
  65. [ 9.761078] [drm] Connector 0:
  66. [ 9.761081] [drm] DP-1
  67. [ 9.761084] [drm] HPD4
  68. [ 9.761088] [drm] DDC: 0x6540 0x6540 0x6544 0x6544 0x6548 0x6548 0x654c 0x654c
  69. [ 9.761092] [drm] Encoders:
  70. [ 9.761095] [drm] DFP1: INTERNAL_UNIPHY2
  71. [ 9.761099] [drm] Connector 1:
  72. [ 9.761101] [drm] HDMI-A-1
  73. [ 9.761104] [drm] HPD3
  74. [ 9.761107] [drm] DDC: 0x6530 0x6530 0x6534 0x6534 0x6538 0x6538 0x653c 0x653c
  75. [ 9.761112] [drm] Encoders:
  76. [ 9.761114] [drm] DFP2: INTERNAL_UNIPHY2
  77. [ 9.761117] [drm] Connector 2:
  78. [ 9.761120] [drm] DVI-I-1
  79. [ 9.761122] [drm] HPD1
  80. [ 9.761126] [drm] DDC: 0x6560 0x6560 0x6564 0x6564 0x6568 0x6568 0x656c 0x656c
  81. [ 9.761130] [drm] Encoders:
  82. [ 9.761133] [drm] DFP3: INTERNAL_UNIPHY
  83. [ 9.761136] [drm] CRT1: INTERNAL_KLDSCP_DAC1
  84. [ 9.823031] [drm] fb mappable at 0xD05D9000
  85. [ 9.823035] [drm] vram apper at 0xD0000000
  86. [ 9.823038] [drm] size 8294400
  87. [ 9.823041] [drm] fb depth is 24
  88. [ 9.823043] [drm] pitch is 6912
  89. [ 9.823105] fbcon: radeondrmfb (fb0) is primary device
  90. [ 9.861409] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery tried 5 times
  91. [ 9.861450] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery failed
  92. [ 9.881669] Console: switching to colour frame buffer device 200x65
  93. [ 9.885004] radeon 0000:01:00.0: fb0: radeondrmfb frame buffer device
  94. [ 9.900036] [drm] Initialized radeon 2.46.0 20080528 for 0000:01:00.0 on minor 0
  95. [ 10.805071] ------------[ cut here ]------------
  96. [ 10.805119] WARNING: CPU: 4 PID: 75 at /build/linux-xXpTKI/linux-4.8.0/include/drm/drm_crtc.h:3131 drm_helper_choose_encoder_dpms+0x8a/0x90 [drm_kms_helper]
  97. [ 10.805186] Modules linked in: amdkfd amd_iommu_v2 radeon i2c_algo_bit ttm drm_kms_helper tg3 syscopyarea sysfillrect ptp sysimgblt mptsas(+) hid_generic fb_sys_fops mptscsih usbhid mptbase hid pata_acpi drm pps_core ahci scsi_transport_sas libahci
  98. [ 10.805363] CPU: 4 PID: 75 Comm: kworker/4:1 Not tainted 4.8.0-41-generic #44-Ubuntu
  99. [ 10.805393] Hardware name: Dell Inc. Precision WorkStation T7400 /0RW199, BIOS A11 04/30/2012
  100. [ 10.805474] Workqueue: events radeon_dp_work_func [radeon]
  101. [ 10.805500] 0000000000000286 000000000e7db13a ffff99b54c9fbd18 ffffffff82830e92
  102. [ 10.805542] 0000000000000000 0000000000000000 ffff99b54c9fbd58 ffffffff8248319b
  103. [ 10.805583] 00000c3b43a39488 ffff99b54cdcb800 ffff99b543c91600 ffff99b543a3b000
  104. [ 10.805625] Call Trace:
  105. [ 10.805641] [<ffffffff82830e92>] dump_stack+0x63/0x81
  106. [ 10.805664] [<ffffffff8248319b>] __warn+0xcb/0xf0
  107. [ 10.805685] [<ffffffff824832cd>] warn_slowpath_null+0x1d/0x20
  108. [ 10.805712] [<ffffffffc047150a>] drm_helper_choose_encoder_dpms+0x8a/0x90 [drm_kms_helper]
  109. [ 10.805744] [<ffffffffc04715fb>] drm_helper_connector_dpms+0x4b/0x100 [drm_kms_helper]
  110. [ 10.805785] [<ffffffffc04d3917>] radeon_connector_hotplug+0xf7/0x100 [radeon]
  111. [ 10.805828] [<ffffffffc04e174f>] radeon_dp_work_func+0x3f/0x60 [radeon]
  112. [ 10.805856] [<ffffffff8249d96c>] process_one_work+0x1fc/0x4b0
  113. [ 10.805880] [<ffffffff8249dc6b>] worker_thread+0x4b/0x500
  114. [ 10.805902] [<ffffffff8249dc20>] ? process_one_work+0x4b0/0x4b0
  115. [ 10.805927] [<ffffffff8249dc20>] ? process_one_work+0x4b0/0x4b0
  116. [ 10.805952] [<ffffffff824a40d8>] kthread+0xd8/0xf0
  117. [ 10.805972] [<ffffffff82ca071f>] ret_from_fork+0x1f/0x40
  118. [ 10.805992] [<ffffffff824a4000>] ? kthread_create_on_node+0x1e0/0x1e0
  119. [ 10.806017] ---[ end trace 54c886ab4efdb67a ]---
  120. [ 10.806037] ------------[ cut here ]------------
  121. [ 10.806061] WARNING: CPU: 4 PID: 75 at /build/linux-xXpTKI/linux-4.8.0/include/drm/drm_crtc.h:3131 drm_helper_choose_crtc_dpms+0x93/0xa0 [drm_kms_helper]
  122. [ 10.806104] Modules linked in: amdkfd amd_iommu_v2 radeon i2c_algo_bit ttm drm_kms_helper tg3 syscopyarea sysfillrect ptp sysimgblt mptsas(+) hid_generic fb_sys_fops mptscsih usbhid mptbase hid pata_acpi drm pps_core ahci scsi_transport_sas libahci
  123. [ 10.806268] CPU: 4 PID: 75 Comm: kworker/4:1 Tainted: G W 4.8.0-41-generic #44-Ubuntu
  124. [ 10.806302] Hardware name: Dell Inc. Precision WorkStation T7400 /0RW199, BIOS A11 04/30/2012
  125. [ 10.806350] Workqueue: events radeon_dp_work_func [radeon]
  126. [ 10.806376] 0000000000000286 000000000e7db13a ffff99b54c9fbd18 ffffffff82830e92
  127. [ 10.806417] 0000000000000000 0000000000000000 ffff99b54c9fbd58 ffffffff8248319b
  128. [ 10.807990] 00000c3b43a39488 ffff99b54cdcb800 ffff99b543a3b000 ffff99b543a3b000
  129. [ 10.809053] Call Trace:
  130. [ 10.809053] [<ffffffff82830e92>] dump_stack+0x63/0x81
  131. [ 10.809053] [<ffffffff8248319b>] __warn+0xcb/0xf0
  132. [ 10.809053] [<ffffffff824832cd>] warn_slowpath_null+0x1d/0x20
  133. [ 10.809053] [<ffffffffc04715a3>] drm_helper_choose_crtc_dpms+0x93/0xa0 [drm_kms_helper]
  134. [ 10.809053] [<ffffffffc0471627>] drm_helper_connector_dpms+0x77/0x100 [drm_kms_helper]
  135. [ 10.809053] [<ffffffffc04ba010>] ? atombios_blank_crtc+0x150/0x150 [radeon]
  136. [ 10.809053] [<ffffffffc04d3917>] radeon_connector_hotplug+0xf7/0x100 [radeon]
  137. [ 10.809053] [<ffffffffc04e174f>] radeon_dp_work_func+0x3f/0x60 [radeon]
  138. [ 10.809053] [<ffffffff8249d96c>] process_one_work+0x1fc/0x4b0
  139. [ 10.809053] [<ffffffff8249dc6b>] worker_thread+0x4b/0x500
  140. [ 10.809053] [<ffffffff8249dc20>] ? process_one_work+0x4b0/0x4b0
  141. [ 10.809053] [<ffffffff8249dc20>] ? process_one_work+0x4b0/0x4b0
  142. [ 10.809053] [<ffffffff824a40d8>] kthread+0xd8/0xf0
  143. [ 10.809053] [<ffffffff82ca071f>] ret_from_fork+0x1f/0x40
  144. [ 10.809053] [<ffffffff824a4000>] ? kthread_create_on_node+0x1e0/0x1e0
  145. [ 10.834872] ---[ end trace 54c886ab4efdb67b ]---
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