group.of.nepali.translators team mailing list archive

[Dan Streetman <dan.streetman@xxxxxxxxxxxxx>]

Public bug reported:

[impact]

The amdgpu driver, when configured with MST monitors (i.e. displayport
"daisy-chaining"), encounters a WARNING when blanking - such as when the
display(s) are put to sleep after idle timeout.

[test case]

on a system with a amd gpu using the amdgpu driver, that is capable and
configured for displayport mst (with multiple dp daisy chained
monitors), blank the screen and then wake up the screen.  This will be
logged:

    [drm:generic_reg_wait [amdgpu]] *ERROR* REG_WAIT timeout 10us * 3000 tries - dce110_stream_encoder_dp_blank line:944
    ------------[ cut here ]------------
    WARNING: CPU: 0 PID: 2201 at /var/lib/dkms/amdgpu/18.50-690240/build/amd/amdgpu/../display/dc/dc_helper.c:249 generic_reg_wait+0xe7/0x160 [amdgpu]
    Call Trace:
     dce110_stream_encoder_dp_blank+0x11c/0x180 [amdgpu]
     core_link_disable_stream+0x40/0x230 [amdgpu]
     ? generic_reg_update_ex+0xdb/0x130 [amdgpu]
     dce110_reset_hw_ctx_wrap+0xb7/0x1f0 [amdgpu]
     dce110_apply_ctx_to_hw+0x30/0x430 [amdgpu]
     ? dce110_apply_ctx_for_surface+0x206/0x260 [amdgpu]
     dc_commit_state+0x2ba/0x4d0 [amdgpu]
     amdgpu_dm_atomic_commit_tail+0x297/0xd70 [amdgpu]
     ? amdgpu_bo_pin_restricted+0x58/0x260 [amdgpu]
     ? wait_for_completion_timeout+0x1f/0x120
     ? wait_for_completion_interruptible+0x1c/0x160
     commit_tail+0x3d/0x60 [drm_kms_helper]
     drm_atomic_helper_commit+0xf6/0x100 [drm_kms_helper]
     drm_atomic_connector_commit_dpms+0xe5/0xf0 [drm]
     drm_mode_obj_set_property_ioctl+0x14f/0x250 [drm]
     drm_mode_connector_property_set_ioctl+0x2e/0x40 [drm]
     drm_ioctl+0x1e0/0x430 [drm]
     ? drm_mode_connector_set_obj_prop+0x70/0x70 [drm]
     ? ep_read_events_proc+0xb0/0xb0
     ? ep_scan_ready_list.constprop.18+0x1e6/0x1f0
     ? timerqueue_add+0x52/0x80
     amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
     do_vfs_ioctl+0x90/0x5f0
     SyS_ioctl+0x74/0x80
     do_syscall_64+0x74/0x140
     entry_SYSCALL_64_after_hwframe+0x3d/0xa2
    ---[ end trace 3ed7b77a97d60f72 ]---

[regression potential]

this modifies the sequence of actions during link disabling, so any
regressions would appear at that time.

[other info]

this is from upstream 8c9d90eebd23b6d40ddf4ce5df5ca2b932336a06

this is included in disco from bug 1812427

this is needed in bionic and cosmic

the xenial kernel does not (reliably) support dp mst, so this is not
needed there

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Fix Released

** Affects: linux (Ubuntu Xenial)
     Importance: Undecided
         Status: Invalid

** Affects: linux (Ubuntu Bionic)
     Importance: Medium
     Assignee: Dan Streetman (ddstreet)
         Status: In Progress

** Affects: linux (Ubuntu Cosmic)
     Importance: Medium
     Assignee: Dan Streetman (ddstreet)
         Status: In Progress

** Affects: linux (Ubuntu Disco)
     Importance: Undecided
         Status: Fix Released

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Disco)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Cosmic)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Disco)
       Status: New => Fix Committed

** Description changed:

  [impact]
  
  The amdgpu driver, when configured with MST monitors (i.e. displayport
  "daisy-chaining"), encounters a WARNING when blanking - such as when the
  display(s) are put to sleep after idle timeout.
  
  [test case]
  
  on a system with a amd gpu using the amdgpu driver, that is capable and
  configured for displayport mst (with multiple dp daisy chained
  monitors), blank the screen and then wake up the screen.  This will be
  logged:
  
-     [drm:generic_reg_wait [amdgpu]] *ERROR* REG_WAIT timeout 10us * 3000 tries - dce110_stream_encoder_dp_blank line:944
-     ------------[ cut here ]------------
-     WARNING: CPU: 0 PID: 2201 at /var/lib/dkms/amdgpu/18.50-690240/build/amd/amdgpu/../display/dc/dc_helper.c:249 generic_reg_wait+0xe7/0x160 [amdgpu]
-     Call Trace:
-      dce110_stream_encoder_dp_blank+0x11c/0x180 [amdgpu]
-      core_link_disable_stream+0x40/0x230 [amdgpu]
-      ? generic_reg_update_ex+0xdb/0x130 [amdgpu]
-      dce110_reset_hw_ctx_wrap+0xb7/0x1f0 [amdgpu]
-      dce110_apply_ctx_to_hw+0x30/0x430 [amdgpu]
-      ? dce110_apply_ctx_for_surface+0x206/0x260 [amdgpu]
-      dc_commit_state+0x2ba/0x4d0 [amdgpu]
-      amdgpu_dm_atomic_commit_tail+0x297/0xd70 [amdgpu]
-      ? amdgpu_bo_pin_restricted+0x58/0x260 [amdgpu]
-      ? wait_for_completion_timeout+0x1f/0x120
-      ? wait_for_completion_interruptible+0x1c/0x160
-      commit_tail+0x3d/0x60 [drm_kms_helper]
-      drm_atomic_helper_commit+0xf6/0x100 [drm_kms_helper]
-      drm_atomic_connector_commit_dpms+0xe5/0xf0 [drm]
-      drm_mode_obj_set_property_ioctl+0x14f/0x250 [drm]
-      drm_mode_connector_property_set_ioctl+0x2e/0x40 [drm]
-      drm_ioctl+0x1e0/0x430 [drm]
-      ? drm_mode_connector_set_obj_prop+0x70/0x70 [drm]
-      ? ep_read_events_proc+0xb0/0xb0
-      ? ep_scan_ready_list.constprop.18+0x1e6/0x1f0
-      ? timerqueue_add+0x52/0x80
-      amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
-      do_vfs_ioctl+0x90/0x5f0
-      SyS_ioctl+0x74/0x80
-      do_syscall_64+0x74/0x140
-      entry_SYSCALL_64_after_hwframe+0x3d/0xa2
-     ---[ end trace 3ed7b77a97d60f72 ]---
+     [drm:generic_reg_wait [amdgpu]] *ERROR* REG_WAIT timeout 10us * 3000 tries - dce110_stream_encoder_dp_blank line:944
+     ------------[ cut here ]------------
+     WARNING: CPU: 0 PID: 2201 at /var/lib/dkms/amdgpu/18.50-690240/build/amd/amdgpu/../display/dc/dc_helper.c:249 generic_reg_wait+0xe7/0x160 [amdgpu]
+     Call Trace:
+      dce110_stream_encoder_dp_blank+0x11c/0x180 [amdgpu]
+      core_link_disable_stream+0x40/0x230 [amdgpu]
+      ? generic_reg_update_ex+0xdb/0x130 [amdgpu]
+      dce110_reset_hw_ctx_wrap+0xb7/0x1f0 [amdgpu]
+      dce110_apply_ctx_to_hw+0x30/0x430 [amdgpu]
+      ? dce110_apply_ctx_for_surface+0x206/0x260 [amdgpu]
+      dc_commit_state+0x2ba/0x4d0 [amdgpu]
+      amdgpu_dm_atomic_commit_tail+0x297/0xd70 [amdgpu]
+      ? amdgpu_bo_pin_restricted+0x58/0x260 [amdgpu]
+      ? wait_for_completion_timeout+0x1f/0x120
+      ? wait_for_completion_interruptible+0x1c/0x160
+      commit_tail+0x3d/0x60 [drm_kms_helper]
+      drm_atomic_helper_commit+0xf6/0x100 [drm_kms_helper]
+      drm_atomic_connector_commit_dpms+0xe5/0xf0 [drm]
+      drm_mode_obj_set_property_ioctl+0x14f/0x250 [drm]
+      drm_mode_connector_property_set_ioctl+0x2e/0x40 [drm]
+      drm_ioctl+0x1e0/0x430 [drm]
+      ? drm_mode_connector_set_obj_prop+0x70/0x70 [drm]
+      ? ep_read_events_proc+0xb0/0xb0
+      ? ep_scan_ready_list.constprop.18+0x1e6/0x1f0
+      ? timerqueue_add+0x52/0x80
+      amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
+      do_vfs_ioctl+0x90/0x5f0
+      SyS_ioctl+0x74/0x80
+      do_syscall_64+0x74/0x140
+      entry_SYSCALL_64_after_hwframe+0x3d/0xa2
+     ---[ end trace 3ed7b77a97d60f72 ]---
  
  [regression potential]
  
  this modifies the sequence of actions during link disabling, so any
  regressions would appear at that time.
  
  [other info]
  
  this is from upstream 8c9d90eebd23b6d40ddf4ce5df5ca2b932336a06
+ 
+ this is included in disco from bug 1812427
+ 
+ this is needed in bionic and cosmic
+ 
+ the xenial kernel does not (reliably) support dp mst, so this is not
+ needed there

** Changed in: linux (Ubuntu Xenial)
       Status: New => Invalid

** Changed in: linux (Ubuntu Bionic)
       Status: New => In Progress

** Changed in: linux (Ubuntu Cosmic)
       Status: New => In Progress

** Changed in: linux (Ubuntu Cosmic)
     Assignee: (unassigned) => Dan Streetman (ddstreet)

** Changed in: linux (Ubuntu Bionic)
     Assignee: (unassigned) => Dan Streetman (ddstreet)

** Changed in: linux (Ubuntu Cosmic)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu Bionic)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu Disco)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1814308

Title:
  amdgpu with mst WARNING on blanking

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Invalid
Status in linux source package in Bionic:
  In Progress
Status in linux source package in Cosmic:
  In Progress
Status in linux source package in Disco:
  Fix Released

Bug description:
  [impact]

  The amdgpu driver, when configured with MST monitors (i.e. displayport
  "daisy-chaining"), encounters a WARNING when blanking - such as when
  the display(s) are put to sleep after idle timeout.

  [test case]

  on a system with a amd gpu using the amdgpu driver, that is capable
  and configured for displayport mst (with multiple dp daisy chained
  monitors), blank the screen and then wake up the screen.  This will be
  logged:

      [drm:generic_reg_wait [amdgpu]] *ERROR* REG_WAIT timeout 10us * 3000 tries - dce110_stream_encoder_dp_blank line:944
      ------------[ cut here ]------------
      WARNING: CPU: 0 PID: 2201 at /var/lib/dkms/amdgpu/18.50-690240/build/amd/amdgpu/../display/dc/dc_helper.c:249 generic_reg_wait+0xe7/0x160 [amdgpu]
      Call Trace:
       dce110_stream_encoder_dp_blank+0x11c/0x180 [amdgpu]
       core_link_disable_stream+0x40/0x230 [amdgpu]
       ? generic_reg_update_ex+0xdb/0x130 [amdgpu]
       dce110_reset_hw_ctx_wrap+0xb7/0x1f0 [amdgpu]
       dce110_apply_ctx_to_hw+0x30/0x430 [amdgpu]
       ? dce110_apply_ctx_for_surface+0x206/0x260 [amdgpu]
       dc_commit_state+0x2ba/0x4d0 [amdgpu]
       amdgpu_dm_atomic_commit_tail+0x297/0xd70 [amdgpu]
       ? amdgpu_bo_pin_restricted+0x58/0x260 [amdgpu]
       ? wait_for_completion_timeout+0x1f/0x120
       ? wait_for_completion_interruptible+0x1c/0x160
       commit_tail+0x3d/0x60 [drm_kms_helper]
       drm_atomic_helper_commit+0xf6/0x100 [drm_kms_helper]
       drm_atomic_connector_commit_dpms+0xe5/0xf0 [drm]
       drm_mode_obj_set_property_ioctl+0x14f/0x250 [drm]
       drm_mode_connector_property_set_ioctl+0x2e/0x40 [drm]
       drm_ioctl+0x1e0/0x430 [drm]
       ? drm_mode_connector_set_obj_prop+0x70/0x70 [drm]
       ? ep_read_events_proc+0xb0/0xb0
       ? ep_scan_ready_list.constprop.18+0x1e6/0x1f0
       ? timerqueue_add+0x52/0x80
       amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
       do_vfs_ioctl+0x90/0x5f0
       SyS_ioctl+0x74/0x80
       do_syscall_64+0x74/0x140
       entry_SYSCALL_64_after_hwframe+0x3d/0xa2
      ---[ end trace 3ed7b77a97d60f72 ]---

  [regression potential]

  this modifies the sequence of actions during link disabling, so any
  regressions would appear at that time.

  [other info]

  this is from upstream 8c9d90eebd23b6d40ddf4ce5df5ca2b932336a06

  this is included in disco from bug 1812427

  this is needed in bionic and cosmic

  the xenial kernel does not (reliably) support dp mst, so this is not
  needed there

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