<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_VERIFIED bz_closed" title="VERIFIED FIXED - [HSW bisected]igt/testdisplay cause Call Trace with HDMI/DP and eDP:WARNING: CPU: 3 PID: 3307 at drivers/gpu/drm/i915/intel_display.c:6894 hsw_enable_pc8+0x251/0x63f [i915]()" href="https://bugs.freedesktop.org/show_bug.cgi?id=76876#c8">Comment # 8</a> on <a class="bz_bug_link bz_status_VERIFIED bz_closed" title="VERIFIED FIXED - [HSW bisected]igt/testdisplay cause Call Trace with HDMI/DP and eDP:WARNING: CPU: 3 PID: 3307 at drivers/gpu/drm/i915/intel_display.c:6894 hsw_enable_pc8+0x251/0x63f [i915]()" href="https://bugs.freedesktop.org/show_bug.cgi?id=76876">bug 76876</a> from <a class="email" href="mailto:madcat@mymadcat.com" title="Adrien BUSTANY <madcat@mymadcat.com>"> Adrien BUSTANY</a> <pre>I seem to be still affected by this bug, when running kernel 3.16.2-201.fc20.x86_64 (which, according to git tag --contains, should contain the fix <a href="http://patchwork.freedesktop.org/patch/21687/">http://patchwork.freedesktop.org/patch/21687/</a> ?)... Screen turns black randomly (maybe when the GPU goes to powersave), and I need to do something (eg. invoke alt-tab window switcher, or scroll) to bring it back. The backlight appears to be on still while the screen is black. Some warnings appear in dmesg: [14764.068319] ------------[ cut here ]------------ [14764.068326] WARNING: CPU: 3 PID: 10106 at drivers/gpu/drm/i915/intel_display.c:7257 hsw_enable_pc8+0x597/0x600 [i915]() [14764.068327] PCH PWM1 enabled [14764.068327] Modules linked in: rfcomm fuse xt_CHECKSUM tun ip6t_rpfilter ip6t_REJECT xt_addrtype ipt_MASQUERADE dm_thin_pool dm_persistent_data xt_conntrack dm_bio_prison libcrc32c loop ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 vboxpci(OE) nf_defrag_ipv4 vboxnetadp(OE) nf_nat_ipv4 nf_nat vboxnetflt(OE) nf_conntrack iptable_mangle iptable_security iptable_raw bnep vboxdrv(OE) btusb bluetooth joydev iTCO_wdt iTCO_vendor_support nls_utf8 applesmc input_polldev hfsplus bcm5974 snd_hda_codec_cirrus snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm [14764.068343] x86_pkg_temp_thermal coretemp kvm_intel kvm wl(POE) cfg80211 microcode rfkill sbs sbshc snd_timer snd i2c_i801 soundcore mei_me lpc_ich shpchp mfd_core mei apple_bl nfsd auth_rpcgss nfs_acl lockd sunrpc dm_crypt crct10dif_pclmul crc32_pclmul crc32c_intel i915 i2c_algo_bit drm_kms_helper uas ghash_clmulni_intel drm usb_storage i2c_core video [14764.068353] CPU: 3 PID: 10106 Comm: kworker/3:0 Tainted: P W OE 3.16.2-201.fc20.x86_64 #1 [14764.068354] Hardware name: Apple Inc. MacBookPro11,1/Mac-189A3D4F975D5FFC, BIOS MBP111.88Z.0138.B03.1310291227 10/29/2013 [14764.068355] Workqueue: pm pm_runtime_work [14764.068356] 0000000000000000 00000000363eea1a ffff88042d9d7bf8 ffffffff81706e31 [14764.068357] ffff88042d9d7c40 ffff88042d9d7c30 ffffffff8108d0ad ffff880455030000 [14764.068359] ffff880455c48b68 ffff880455c48b70 ffff880458ad9098 ffff880458ad9098 [14764.068360] Call Trace: [14764.068361] [<ffffffff81706e31>] dump_stack+0x45/0x56 [14764.068363] [<ffffffff8108d0ad>] warn_slowpath_common+0x7d/0xa0 [14764.068364] [<ffffffff8108d12c>] warn_slowpath_fmt+0x5c/0x80 [14764.068373] [<ffffffffa011cc47>] hsw_enable_pc8+0x597/0x600 [i915] [14764.068379] [<ffffffffa00c59bd>] intel_runtime_suspend+0x1cd/0x8a0 [i915] [14764.068381] [<ffffffff813a0301>] pci_pm_runtime_suspend+0x61/0x140 [14764.068383] [<ffffffff8147afe1>] __rpm_callback+0x31/0x80 [14764.068384] [<ffffffff8147b054>] rpm_callback+0x24/0x80 [14764.068385] [<ffffffff8147b1d1>] rpm_suspend+0x121/0x630 [14764.068386] [<ffffffff8147c79a>] pm_runtime_work+0x7a/0xb0 [14764.068388] [<ffffffff810a90c6>] process_one_work+0x176/0x430 [14764.068390] [<ffffffff810a979d>] worker_thread+0x11d/0x530 [14764.068391] [<ffffffff810a9680>] ? rescuer_thread+0x300/0x300 [14764.068393] [<ffffffff810b0268>] kthread+0xd8/0xf0 [14764.068394] [<ffffffff810b0190>] ? insert_kthread_work+0x40/0x40 [14764.068396] [<ffffffff8170e3bc>] ret_from_fork+0x7c/0xb0 [14764.068397] [<ffffffff810b0190>] ? insert_kthread_work+0x40/0x40 [14764.068398] ---[ end trace c805e8f009ce6898 ]--- [14775.978146] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off [14875.106780] ------------[ cut here ]------------ There are several line variants for the same stack trace (all in intel_display.c): [14495.986462] WARNING: CPU: 0 PID: 28580 at drivers/gpu/drm/i915/intel_display.c:7245 hsw_enable_pc8+0x485/0x600 [i915]() [14495.986601] WARNING: CPU: 0 PID: 28580 at drivers/gpu/drm/i915/intel_display.c:7251 hsw_enable_pc8+0x5f4/0x600 [i915]() [14495.986698] WARNING: CPU: 0 PID: 28580 at drivers/gpu/drm/i915/intel_display.c:7253 hsw_enable_pc8+0x5d5/0x600 [i915]() [14495.986798] WARNING: CPU: 0 PID: 28580 at drivers/gpu/drm/i915/intel_display.c:7257 hsw_enable_pc8+0x597/0x600 [i915]() Those are the current driver parameters: /sys/module/i915/parameters/disable_display = N /sys/module/i915/parameters/disable_power_well = 1 /sys/module/i915/parameters/disable_vtd_wa = N /sys/module/i915/parameters/enable_cmd_parser = 1 /sys/module/i915/parameters/enable_fbc = -1 /sys/module/i915/parameters/enable_hangcheck = Y /sys/module/i915/parameters/enable_ips = 1 /sys/module/i915/parameters/enable_ppgtt = 1 /sys/module/i915/parameters/enable_psr = 0 /sys/module/i915/parameters/enable_rc6 = 1 /sys/module/i915/parameters/fastboot = Y /sys/module/i915/parameters/invert_brightness = 0 /sys/module/i915/parameters/lvds_channel_mode = 0 /sys/module/i915/parameters/lvds_downclock = 1 /sys/module/i915/parameters/lvds_use_ssc = -1 /sys/module/i915/parameters/modeset = -1 /sys/module/i915/parameters/panel_ignore_lid = 1 /sys/module/i915/parameters/powersave = 1 /sys/module/i915/parameters/prefault_disable = N /sys/module/i915/parameters/preliminary_hw_support = 0 /sys/module/i915/parameters/reset = Y /sys/module/i915/parameters/semaphores = -1 /sys/module/i915/parameters/vbt_sdvo_panel_type = -1</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> </ul> </body> </html>