linux-kernel - [LKP] [drm/i915] WARNING: CPU: 0 PID: 258 at drivers/gpu/drm/i915/intel_pm.c:4994 intel_disable_gt

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Message-ID: <53D861F6.4060603@intel.com>
Date:	Wed, 30 Jul 2014 11:09:42 +0800
From:	Aaron Lu <aaron.lu@...el.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
CC:	Daniel Vetter <daniel.vetter@...ll.ch>,
	LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [LKP] [drm/i915] WARNING: CPU: 0 PID: 258 at drivers/gpu/drm/i915/intel_pm.c:4994
 intel_disable_gt_powersave+0x416/0x420 [i915]()

FYI, we noticed the below changes on

git://anongit.freedesktop.org/drm-intel drm-intel-nightly
commit 9df7575f1c751a333b1989d1c7e2b9fc884d9105 ("drm/i915: add helper for checking whether IRQs are enabled")

+-----------------+------------+------------+
|                 | 9a76e4956b | 9df7575f1c |
+-----------------+------------+------------+
| boot_successes  | 10         | 10         |
| early-boot-hang | 1          | 1          |
+-----------------+------------+------------+

[    9.053025] Error: Driver 'pcspkr' is already registered, aborting...
[    9.056303] thinkpad_acpi: Console audio control enabled, mode: monitor (read only)
[    9.061814] ------------[ cut here ]------------
[    9.063604] WARNING: CPU: 0 PID: 258 at drivers/gpu/drm/i915/intel_pm.c:4994 intel_disable_gt_powersave+0x416/0x420 [i915]()
[    9.069494] Modules linked in: mxm_wmi(+)
[    9.071289] input: ThinkPad Extra Buttons as /devices/platform/thinkpad_acpi/input/input8
[    9.075274]  videobuf2_vmalloc snd_pcsp(-) snd_hwdep videobuf2_memops videobuf2_core v4l2_common i915(+) parport_pc snd_pcm thinkpad_acpi ahci parport videodev sdhci_pci firewire_ohci pcspkr rfkill sdhci firewire_core video snd_timer libahci mmc_core
[    9.085093] uvcvideo: Found UVC 1.00 device Integrated Camera (17ef:480f)

Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.

Thanks,
Aaron

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