<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [C220] Display goes blank with PCH PWM1 enabled warning in intel_display.c:7376/6900" href="https://bugs.freedesktop.org/show_bug.cgi?id=86105#c17">Comment # 17</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [C220] Display goes blank with PCH PWM1 enabled warning in intel_display.c:7376/6900" href="https://bugs.freedesktop.org/show_bug.cgi?id=86105">bug 86105</a> from <a class="email" href="mailto:b.kamek@gmail.com" title="kamek <b.kamek@gmail.com>"> kamek</a> <pre>I'm also experiencing this. It only happens after a suspend and stops on reboot. kamek [~] > uname -a Linux ghost 3.17.6-1-ARCH #1 SMP PREEMPT Sun Dec 7 23:43:32 UTC 2014 x86_64 GNU/Linux [ 6024.635003] ------------[ cut here ]------------ [ 6024.635009] WARNING: CPU: 3 PID: 3204 at drivers/gpu/drm/i915/intel_display.c:7376 hsw_enable_pc8+0x633/0x640 [i915]() [ 6024.635010] PCH PWM1 enabled [ 6024.635010] Modules linked in: msr cpufreq_stats fuse snd_hda_codec_hdmi iTCO_wdt iTCO_vendor_support nls_ascii nls_cp437 vfat fat ecb btusb bluetooth hid_generic joydev hid_apple mousedev uas usb_storage mac_hid evdev usbhid hid bcm5974 wl(PO) coretemp ip6t_REJECT intel_rapl x86_pkg_temp_thermal intel_powerclamp kvm_intel nf_log_ipv6 kvm xt_hl crct10dif_pclmul crc32_pclmul crc32c_intel ip6t_rt ghash_clmulni_intel applesmc led_class input_polldev hwmon aesni_intel cfg80211 aes_x86_64 lrw gf128mul glue_helper ablk_helper nf_conntrack_ipv6 cryptd nf_defrag_ipv6 pcspkr lpc_ich rfkill snd_hda_codec_cirrus i2c_i801 snd_hda_codec_generic i915 ipt_REJECT drm_kms_helper xt_comment snd_hda_intel snd_hda_controller sbs nf_log_ipv4 battery nf_log_common sbshc snd_hda_codec drm snd_hwdep intel_gtt i2c_algo_bit [ 6024.635033] snd_pcm ac apple_bl i2c_core video xt_LOG button mei_me snd_timer mei snd shpchp processor soundcore xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack iptable_filter ip_tables x_tables sch_fq_codel ext4 crc16 mbcache jbd2 sd_mod crc_t10dif crct10dif_common ahci libahci libata scsi_mod xhci_hcd usbcore usb_common [ 6024.635048] CPU: 3 PID: 3204 Comm: kworker/3:2 Tainted: P W O 3.17.6-1-ARCH #1 [ 6024.635049] Hardware name: Apple Inc. MacBookPro11,1/Mac-189A3D4F975D5FFC, BIOS MBP111.88Z.0138.B11.1408291433 08/29/2014 [ 6024.635051] Workqueue: pm pm_runtime_work [ 6024.635051] 0000000000000000 00000000f2be5ac9 ffff8802622bfbf8 ffffffff81537c3e [ 6024.635053] ffff8802622bfc40 ffff8802622bfc30 ffffffff8107079d ffff88025fed0000 [ 6024.635055] ffff8802620b1b58 ffff8802620b1b68 ffff8802620b1800 ffff880263649098 [ 6024.635056] Call Trace: [ 6024.635058] [<ffffffff81537c3e>] dump_stack+0x4d/0x6f [ 6024.635060] [<ffffffff8107079d>] warn_slowpath_common+0x7d/0xa0 [ 6024.635062] [<ffffffff8107081c>] warn_slowpath_fmt+0x5c/0x80 [ 6024.635070] [<ffffffffa03d91a3>] hsw_enable_pc8+0x633/0x640 [i915] [ 6024.635075] [<ffffffffa037eaa5>] intel_runtime_suspend+0x1a5/0x8c0 [i915] [ 6024.635077] [<ffffffff810136b2>] ? __switch_to+0x1b2/0x5e0 [ 6024.635080] [<ffffffff812e6cff>] pci_pm_runtime_suspend+0x5f/0x150 [ 6024.635083] [<ffffffff812e6ca0>] ? pci_legacy_suspend_late+0xe0/0xe0 [ 6024.635085] [<ffffffff813b5812>] __rpm_callback+0x32/0x70 [ 6024.635087] [<ffffffff813b5876>] rpm_callback+0x26/0xa0 [ 6024.635089] [<ffffffff813b5dc1>] rpm_suspend+0x121/0x680 [ 6024.635091] [<ffffffff810d6db8>] ? add_timer+0x18/0x30 [ 6024.635093] [<ffffffff81087fbb>] ? __queue_delayed_work+0x8b/0x1c0 [ 6024.635095] [<ffffffff813b764a>] pm_runtime_work+0x7a/0xd0 [ 6024.635097] [<ffffffff81088e05>] process_one_work+0x145/0x400 [ 6024.635099] [<ffffffff810893cb>] worker_thread+0x6b/0x4a0 [ 6024.635101] [<ffffffff81089360>] ? init_pwq.part.22+0x10/0x10 [ 6024.635103] [<ffffffff8108e2ea>] kthread+0xea/0x100 [ 6024.635105] [<ffffffff81070000>] ? unregister_exec_domain+0x50/0x90 [ 6024.635106] [<ffffffff8108e200>] ? kthread_create_on_node+0x1b0/0x1b0 [ 6024.635108] [<ffffffff8153dbbc>] ret_from_fork+0x7c/0xb0 [ 6024.635110] [<ffffffff8108e200>] ? kthread_create_on_node+0x1b0/0x1b0 [ 6024.635111] ---[ end trace 6754af2bd15a3ada ]---</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>