<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Linux 4.3 Broadwell Unclaimed register detected before reading register 0x22394" href="https://bugs.freedesktop.org/show_bug.cgi?id=94171#c1">Comment # 1</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Linux 4.3 Broadwell Unclaimed register detected before reading register 0x22394" href="https://bugs.freedesktop.org/show_bug.cgi?id=94171">bug 94171</a> from <a class="email" href="mailto:a.titeica@navx.com" title="Arthur Țițeică <a.titeica@navx.com>"> Arthur Țițeică</a> <pre>Created <a href="attachment.cgi?id=121782" name="attach_121782" title="dmesg">attachment 121782</a> <a href="attachment.cgi?id=121782&action=edit" title="dmesg">[details]</a> dmesg Another trace with 'drm.debug=0x1e log_buf_len=1M' on the kernel command line. cat /sys/class/drm/card0/error no error state collected I also attached the dmesg log. ------------[ cut here ]------------ WARNING: CPU: 2 PID: 0 at drivers/gpu/drm/i915/intel_uncore.c:620 hsw_unclaimed_reg_debug+0x82/0xa0 [i915]() Unclaimed register detected before reading register 0x223a0 Modules linked in: ctr ccm joydev mousedev btusb btrtl btbcm btintel bluetooth iptable_raw bridge stp llc ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat iptable_mangle xt_limit snd_hda_codec_realtek xt_tcpudp snd_hwdep toshiba_acpi ptp mei_me memstick lpc_ich snd_pcm mei pps_core shpchp snd_timer thermal sparse_keymap toshiba_bluetooth toshiba_haps rfkill snd soundcore fjes wmi dw_dmac dw_dmac_core i2c_designware_platform snd_soc_sst_a i8042 serio sdhci_acpi sdhci led_class video mmc_core button CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.3.5.201602092235-1-grsec #1 Hardware name: TOSHIBA SATELLITE Z30-B/SATELLITE Z30-B, BIOS Version 3.20 04/09/2015 ffffffff00000002 0de1c3e764217778 0000000000000000 ffffffffc03f8dd0 ffff880221283cb0 ffffffff9e2d7360 ffff880221283cf8 ffff880221283ce8 ffffffff9e064e18 ffffffffc03f8dd0 000000000000026c ffffffffc03f8d98 Call Trace: <IRQ> [<ffffffff9e2d7360>] dump_stack+0x4b/0x8b [<ffffffff9e064e18>] warn_slowpath_common+0x78/0xb0 [<ffffffff9e064ebb>] warn_slowpath_fmt+0x6b/0xa0 [<ffffffffc0237ec2>] hsw_unclaimed_reg_debug+0x82/0xa0 [i915] [<ffffffffc023cb8d>] gen6_read32+0x4d/0x130 [i915] [<ffffffffc022da16>] intel_lrc_irq_handler+0x46/0x270 [i915] [<ffffffffc01f6c8f>] gen8_gt_irq_handler+0x20f/0x240 [i915] [<ffffffffc01f6d5f>] gen8_irq_handler+0x9f/0x5e0 [i915] [<ffffffff9e0bb5ea>] handle_irq_event_percpu+0x7a/0x130 [<ffffffff9e0dac62>] ? clockevents_program_event+0x82/0x120 [<ffffffff9e0bb6db>] handle_irq_event+0x3b/0x60 [<ffffffff9e0be9c1>] handle_edge_irq+0xd1/0x190 [<ffffffff9e006739>] handle_irq+0x29/0x40 [<ffffffff9e005fa8>] do_IRQ+0x48/0xe0 [<ffffffff9e5ece8e>] common_interrupt+0x8e/0x8e <EOI> [<ffffffff9e45fc46>] ? cpuidle_enter_state+0x156/0x210 [<ffffffff9e45fc3f>] ? cpuidle_enter_state+0x14f/0x210 [<ffffffff9e45fd60>] cpuidle_enter+0x20/0x30 [<ffffffff9e0ab307>] call_cpuidle+0x37/0x70 [<ffffffff9e0ab4ed>] cpu_startup_entry+0x1ad/0x270 [<ffffffff9e040b50>] ? lapic_get_maxlvt+0x40/0x40 [<ffffffff9e047b90>] ? flat_init_apic_ldr+0x90/0x90 [<ffffffff9e03eaf6>] start_secondary+0x1c6/0x200 ---[ end trace abb82de0cb167d64 ]---</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>