User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:48.0) Gecko/20100101
Firefox/48.0
Build Identifier:
I have configured my system to use the amdgpu kernel driver (note no
experimental support activated) and running Kernel:HEAD
4.8.0-rc2-3.gda13dfd-default. I did have to re-build the xf86-video-amdgpu to
add my Mullins R5 PCI-IDs. I don't see this when running the radeon driver.
Reproducible: Always
Steps to Reproduce:
1. Boot to Gnome desktop.
2. Set timeout for screen saver 1-15 minutes doesn't matter.
3. From a remote ssh session monitor via top and observe one cpu at ~100% when
screen save activates.
Actual Results:
I ran the following perf command to capture some data which will add as an
attachment;
perf record -F 250 -g -a sleep 10
perf report
Expected Results:
Not consume cpu when idle/screensaver mode.
Summary of main perf data;
+ 99.32% 0.00% kworker/1:1 [kernel.kallsyms] [k]
amdgpu_atombios_encoder_set_edp_panel_power
+ 99.32% 0.00% kworker/1:1 [kernel.kallsyms] [k]
amdgpu_connector_dp_detect
+ 99.32% 0.00% kworker/1:1 [kernel.kallsyms] [k]
drm_helper_hpd_irq_event
+ 99.32% 0.00% kworker/1:1 [kernel.kallsyms] [k]
process_one_work
+ 99.32% 0.00% kworker/1:1 [kernel.kallsyms] [k]
worker_thread
+ 99.32% 0.00% kworker/1:1 [kernel.kallsyms] [k]
kthread
+ 99.32% 0.00% kworker/1:1 [kernel.kallsyms] [k]
ret_from_fork
+ 84.09% 0.00% kworker/1:1 [kernel.kallsyms] [k]
amdgpu_atom_execute_table
+ 84.09% 1.71% kworker/1:1 [kernel.kallsyms] [k]
amdgpu_atom_execute_table_locked
+ 80.61% 1.25% kworker/1:1 [kernel.kallsyms] [k]
atom_op_test
+ 79.35% 78.50% kworker/1:1 [kernel.kallsyms] [k]
atom_get_src_int
+ 15.24% 15.24% kworker/1:1 [kernel.kallsyms] [k]
delay_tsc
+ 1.77% 1.60% kworker/1:1 [kernel.kallsyms] [k]
atom_op_jump
+ 0.77% 0.77% kworker/1:1 [kernel.kallsyms] [k]
amdgpu_mm_rreg