Hi list! I got this oops report in 3.6.1 when suspending my machine from suspend: ACPI: Low-level resume complete [...] i915 0000:00:02.0: setting latency timer to 64 [...] [drm] Enabling RC6 states: RC6 on, RC6p on, RC6pp off ------------[ cut here ]------------ WARNING: at drivers/gpu/drm/i915/intel_display.c:1076 assert_pch_pll+0x18f/0x1f0 [i915]() Hardware name: To Be Filled By O.E.M. PCH PLL state for reg c6014 assertion failure (expected on, current off), val=04800080 Modules linked in: pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) fuse w83627ehf dm_mod hid_generic usbhid hid snd_hda_codec_hdmi snd_hda_codec_realtek i915 snd_hda_intel snd_hda_codec intel_agp intel_gtt i2c_algo_bit snd_hwdep snd_pcm snd_page_alloc r8169 drm_kms_helper drm snd_timer i2c_i801 e1000e mii acpi_cpufreq mei snd iTCO_wdt microcode aesni_intel aes_x86_64 aes_generic iTCO_vendor_support mperf ablk_helper ghash_clmulni_intel soundcore i2c_core lpc_ich cryptd kvm_intel kvm coretemp crc32c_intel pcspkr processor psmouse serio_raw video evdev button k10temp hwmon_vid ehci_hcd xhci_hcd usbcore usb_common ext4 crc16 jbd2 sr_mod mbcache cdrom sd_mod ahci libahci libata scsi_mod Call Trace: [<ffffffff81055c6f>] warn_slowpath_common+0x7f/0xc0 [<ffffffff81055d66>] warn_slowpath_fmt+0x46/0x50 [<ffffffffa0328b1f>] assert_pch_pll+0x18f/0x1f0 [i915] [<ffffffffa032e702>] ironlake_crtc_disable+0x4f2/0x7a0 [i915] [<ffffffffa032ea5e>] ironlake_crtc_prepare+0xe/0x10 [i915] [<ffffffffa0212009>] drm_crtc_helper_set_mode+0x2c9/0x500 [drm_kms_helper] [<ffffffff81252e4c>] ? idr_pre_get+0x4c/0x90 [<ffffffffa02122b3>] drm_helper_resume_force_mode+0x73/0x170 [drm_kms_helper] [<ffffffffa0306200>] i915_drm_thaw+0xd0/0x150 [i915] [<ffffffffa03065ce>] i915_resume+0x4e/0x80 [i915] [<ffffffffa0306616>] i915_pm_resume+0x16/0x20 [i915] [<ffffffff8127bb43>] pci_pm_resume+0x73/0xd0 [<ffffffff8127bad0>] ? pci_pm_thaw+0x90/0x90 [<ffffffff8132e8cb>] dpm_run_callback.isra.4+0x3b/0x70 [<ffffffff8132f5c8>] device_resume+0xa8/0x160 [<ffffffff8132f6a1>] async_resume+0x21/0x50 [<ffffffff810814be>] async_run_entry_fn+0x8e/0x1b0 [<ffffffff81073609>] process_one_work+0x139/0x500 [<ffffffff81485e9e>] ? mutex_unlock+0xe/0x10 [<ffffffff81081430>] ? async_schedule+0x20/0x20 [<ffffffff81073d9e>] worker_thread+0x15e/0x460 [<ffffffff81073c40>] ? rescuer_thread+0x230/0x230 [<ffffffff810796b3>] kthread+0x93/0xa0 [<ffffffff81490c84>] kernel_thread_helper+0x4/0x10 [<ffffffff81079620>] ? kthread_freezable_should_stop+0x70/0x70 [<ffffffff81490c80>] ? gs_change+0x13/0x13 ---[ end trace 06d9b7162955a86e ]--- Using Arch Linux x86_64 (testing repos enabled), Ivy Bridge i5-3570K CPU with built-in Intel HD Graphics 4000. Mesa 9.0, X.org 1.13, xf86-video-intel 2.20.9, libdrm 2.4.39 Using two monitors via DVI and HDMI ports. The machine resumed successfully despite the warning and there were no obvious graphics problems. However, I also had a complete machine hang 5 hours later -- not sure if the two events are related. This time no oops, no panic. Graphics was frozen, sound card looping a single buffer over and over. So I have nothing to report on that front. Regards, Marti -- To unsubscribe from this list: send the line "unsubscribe linux-opengl" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html