[Bug 98564] [KVMR][drm:skl_set_power_well] *ERROR* power well 2 disable timeout

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98564

--- Comment #13 from Jason A. Donenfeld <jason at zx2c4.com> ---
While it was said that 4.11 would fix this error, after installing 4.11 and
rebooting into it, I see this in dmesg:

[    0.661407] ------------[ cut here ]------------
[    0.661413] WARNING: CPU: 2 PID: 1 at
drivers/gpu/drm/i915/intel_runtime_pm.c:720 skl_set_power_well+0x5b8/0x5d0
[    0.661416] Clearing unexpected KVMR request for power well 2
[    0.661418] Modules linked in:
[    0.661421] CPU: 2 PID: 1 Comm: swapper/0 Not tainted 4.11.0-gentoo #1
[    0.661423] Hardware name: LENOVO 20ENCTO1WW/20ENCTO1WW, BIOS N1EET65W (1.38
) 02/09/2017
[    0.661426] Call Trace:
[    0.661429]  ? dump_stack+0x46/0x5e
[    0.661433]  ? __warn+0xb9/0xe0
[    0.661436]  ? warn_slowpath_fmt+0x46/0x50
[    0.661439]  ? fwtable_read32+0x7e/0x1b0
[    0.661442]  ? skl_set_power_well+0x5b8/0x5d0
[    0.661444]  ? intel_display_power_put+0xca/0x140
[    0.661447]  ? intel_display_set_init_power+0x1f/0x30
[    0.661456]  ? intel_modeset_setup_hw_state+0xafd/0xce0
[    0.661458]  ? fwtable_read8+0x1b0/0x1b0
[    0.661461]  ? intel_modeset_init+0xdbe/0x1830
[    0.661464]  ? intel_i2c_reset+0x39/0x40
[    0.661467]  ? intel_setup_gmbus+0x2e4/0x300
[    0.661470]  ? i915_driver_load+0x938/0x1430
[    0.661473]  ? local_pci_probe+0x38/0x90
[    0.661476]  ? pci_device_probe+0xd4/0x130
[    0.661479]  ? driver_probe_device+0x1ef/0x2d0
[    0.661482]  ? __driver_attach+0x8f/0xa0
[    0.661485]  ? driver_probe_device+0x2d0/0x2d0
[    0.661487]  ? bus_for_each_dev+0x55/0x90
[    0.661490]  ? bus_add_driver+0x115/0x210
[    0.661493]  ? set_debug_rodata+0xc/0xc
[    0.661496]  ? driver_register+0x52/0xc0
[    0.661499]  ? mipi_dsi_bus_init+0xc/0xc
[    0.661502]  ? do_one_initcall+0x39/0x160
[    0.661505]  ? set_debug_rodata+0xc/0xc
[    0.661508]  ? set_debug_rodata+0xc/0xc
[    0.661511]  ? kernel_init_freeable+0x158/0x1d4
[    0.661514]  ? rest_init+0x70/0x70
[    0.661516]  ? kernel_init+0x5/0xf0
[    0.661518]  ? ret_from_fork+0x23/0x30
[    0.661522] ---[ end trace 72d34686d3e43b95 ]---
[    0.665751] [drm:skl_set_power_well] *ERROR* power well 2 disable timeout

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