Hi, So while trying to reproduce my previously reported "RPM wakelock ref not held during HW access" in 4.12-rc1 ?" Bug, to test the possible fixes I encountered a new "RPM wakelock ref not held during HW access" error combined with a "Unclaimed read from register 0x1f0034" error: Which I believe is a new issue in 4.12-rc1 I've tried adding i915.mmio_debug=99 to the kernel cmdline and then I get the same unclaimed read error 3 times for a single resume. [ 69.462566] Suspended for 3.099 seconds [ 69.463092] PM: resume from suspend-to-idle [ 69.489870] PM: noirq resume of devices complete after 26.368 msecs [ 69.490177] RPM wakelock ref not held during HW access [ 69.490355] ------------[ cut here ]------------ [ 69.490441] WARNING: CPU: 1 PID: 2003 at drivers/gpu/drm/i915/intel_drv.h:1780 intel_init_vebox_ring_buffer+0x3753/0x4cb0 [i915] ... [ 69.491022] RIP: 0010:intel_init_vebox_ring_buffer+0x3753/0x4cb0 [i915] ... [ 69.491089] Call Trace: [ 69.491152] intel_gvt_init_cmd_parser+0x25a/0x360 [i915] [ 69.491172] irq_enable+0x3a/0x50 [ 69.491185] __enable_irq+0x34/0x60 [ 69.491197] resume_irqs+0x8f/0xd0 [ 69.491208] resume_device_irqs+0x10/0x20 [ 69.491223] dpm_resume_noirq+0x23e/0x310 [ 69.491240] suspend_devices_and_enter+0x2f3/0x7f0 [ 69.491254] ? finish_wait+0x80/0x80 [ 69.491266] pm_suspend+0x335/0x3a0 [ 69.491277] state_store+0x85/0xf0 [ 69.491294] kobj_attr_store+0xf/0x20 [ 69.491308] sysfs_kf_write+0x37/0x40 [ 69.491317] kernfs_fop_write+0x11c/0x1a0 [ 69.491332] __vfs_write+0x37/0x160 [ 69.491346] ? selinux_file_permission+0xfb/0x120 [ 69.491359] ? security_file_permission+0x3b/0xc0 [ 69.491370] vfs_write+0xb1/0x1a0 [ 69.491381] SyS_write+0x55/0xc0 [ 69.491398] entry_SYSCALL_64_fastpath+0x1a/0xa5 [ 69.491409] RIP: 0033:0x7f2d526bbc20 ... [ 69.491643] ---[ end trace 18cf4afd61c66532 ]--- [ 70.561773] PM: early resume of devices complete after 1069.774 msecs [ 70.562713] pcieport 0000:00:1c.0: System wakeup disabled by ACPI [ 70.563597] rtc_cmos 00:04: System wakeup disabled by ACPI [ 70.576148] Unclaimed read from register 0x1f0034 [ 70.576244] ------------[ cut here ]------------ [ 70.576278] WARNING: CPU: 2 PID: 5 at drivers/gpu/drm/i915/intel_uncore.c:801 intel_init_vebox_ring_buffer+0x87e/0x4cb0 [i915] ... [ 70.576470] RIP: 0010:intel_init_vebox_ring_buffer+0x87e/0x4cb0 [i915] ... [ 70.576500] Call Trace: [ 70.576529] intel_init_vebox_ring_buffer+0x47da/0x4cb0 [i915] [ 70.576550] i915_gpu_lower+0x9d4/0xd70 [i915] [ 70.576573] ? intel_hdmi_compute_config+0xe07/0x2710 [i915] [ 70.576592] i915_gpu_lower+0xcb5/0xd70 [i915] [ 70.576617] hsw_disable_ips+0xc42/0x1e60 [i915] [ 70.576624] ? tracing_record_cmdline+0x32/0x120 [ 70.576630] ? __schedule+0x23e/0x860 [ 70.576655] hsw_disable_ips+0x1d29/0x1e60 [i915] [ 70.576691] ? drm_atomic_check_only+0x37f/0x540 [drm] [ 70.576721] drm_atomic_commit+0x4b/0x50 [drm] [ 70.576740] drm_atomic_helper_commit_duplicated_state+0xc2/0xd0 [drm_kms_helper] [ 70.576765] i915_redisable_vga+0xc5/0x100 [i915] [ 70.576790] intel_display_resume+0xf7/0x120 [i915] [ 70.576812] 0xffffffffc053b341 [ 70.576828] 0xffffffffc053b3fe [ 70.576834] pci_pm_resume+0x65/0xa0 [ 70.576841] dpm_run_callback+0x57/0x140 [ 70.576845] ? pci_pm_thaw+0x90/0x90 [ 70.576848] device_resume+0xe1/0x200 [ 70.576852] async_resume+0x1d/0x50 [ 70.576856] async_run_entry_fn+0x39/0x170 [ 70.576863] process_one_work+0x193/0x3c0 [ 70.576867] worker_thread+0x4a/0x3a0 [ 70.576871] kthread+0x125/0x140 [ 70.576874] ? process_one_work+0x3c0/0x3c0 [ 70.576877] ? kthread_park+0x60/0x60 [ 70.576884] ret_from_fork+0x2c/0x40 [ 70.576887] Code: 5b 41 5c 41 5d 5d c3 45 84 ed 48 c7 c0 a6 1f 64 c0 48 c7 c6 9c 1f 64 c0 48 0f 44 f0 44 89 e2 48 c7 c7 af 1f 64 c0 e8 73 ec c2 c5 <0f> ff 83 2d 95 31 0e 00 01 5b 41 5c 41 5d 5d c3 66 90 0f 1f 44 [ 70.576961] ---[ end trace 18cf4afd61c66533 ]--- And then 2 more Unclaimed read from register 0x1f0034 messages with the same backtrace. This seems to be consistently reproducible. Regards, Hans _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
