<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Intel HD 520 failed to train DP when connected with a external monitor" href="https://bugs.freedesktop.org/show_bug.cgi?id=93578#c31">Comment # 31</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Intel HD 520 failed to train DP when connected with a external monitor" href="https://bugs.freedesktop.org/show_bug.cgi?id=93578">bug 93578</a> from <a class="email" href="mailto:andraz.tori@gmail.com" title="Andraz Tori <andraz.tori@gmail.com>"> Andraz Tori</a> <pre>Tested on 4.6.0-040600rc4-generic. The problem persists. Thinkpad X260 with HDMI port connected. Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888429] ------------[ cut here ]------------ Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888453] WARNING: CPU: 1 PID: 6 at /home/kernel/COD/linux/drivers/gpu/drm/i915/intel_pm.c:3572 skl_update_other_pipe_wm+0x16c/0x180 [i915] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888454] WARN_ON(!wm_changed) Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888459] Modules linked in: hid_generic usbhid hid rtsx_pci_sdmmc i915 psmouse e1000e i2c_algo_bit ptp drm_kms_helper pps_core ahci rtsx_pci libahci syscopyarea sysfillrect sysimgblt fb_sys_fops drm wmi video fjes Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888461] CPU: 1 PID: 6 Comm: kworker/u16:0 Not tainted 4.6.0-040600rc4-generic #201604172330 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888461] Hardware name: LENOVO 20F5S0AU00/20F5S0AU00, BIOS R02ET44W (1.17 ) 01/25/2016 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888464] Workqueue: events_unbound async_run_entry_fn Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888466] 0000000000000286 000000000acf348e ffff88042ea83610 ffffffff813eee03 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888467] ffff88042ea83660 0000000000000000 ffff88042ea83650 ffffffff810827cb Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888468] 00000df401b6348e ffff880428ded000 ffff880427cf9da4 ffff880428dec000 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888468] Call Trace: Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888471] [<ffffffff813eee03>] dump_stack+0x63/0x90 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888473] [<ffffffff810827cb>] __warn+0xcb/0xf0 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888474] [<ffffffff8108284f>] warn_slowpath_fmt+0x5f/0x80 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888490] [<ffffffffc01c95ec>] skl_update_other_pipe_wm+0x16c/0x180 [i915] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888503] [<ffffffffc01c9785>] skl_update_wm+0x185/0x640 [i915] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888523] [<ffffffffc0217345>] ? gen9_write32+0x235/0x370 [i915] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888545] [<ffffffffc025576f>] ? intel_ddi_enable_transcoder_func+0x17f/0x260 [i915] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888560] [<ffffffffc01cd54e>] intel_update_watermarks+0x1e/0x30 [i915] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888579] [<ffffffffc02396f1>] haswell_crtc_enable+0x321/0x8c0 [i915] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888597] [<ffffffffc0225cee>] ? intel_finish_crtc_commit+0xe/0x10 [i915] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888603] [<ffffffffc01068d4>] ? drm_atomic_helper_commit_planes_on_crtc+0x154/0x270 [drm_kms_helper] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888620] [<ffffffffc0236080>] intel_atomic_commit+0x5e0/0xdc0 [i915] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888633] [<ffffffffc005cc31>] ? drm_atomic_check_only+0x181/0x600 [drm] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888643] [<ffffffffc005d0e7>] drm_atomic_commit+0x37/0x60 [drm] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888648] [<ffffffffc0107b1f>] restore_fbdev_mode+0x22f/0x260 [drm_kms_helper] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888657] [<ffffffffc005bd6a>] ? drm_modeset_lock_all_ctx+0x9a/0xb0 [drm] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888661] [<ffffffffc0109d43>] drm_fb_helper_restore_fbdev_mode_unlocked+0x33/0x80 [drm_kms_helper] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888664] [<ffffffffc0109dbd>] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888667] [<ffffffffc0109cc2>] drm_fb_helper_hotplug_event+0xd2/0x120 [drm_kms_helper] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888670] [<ffffffffc0109d66>] drm_fb_helper_restore_fbdev_mode_unlocked+0x56/0x80 [drm_kms_helper] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888673] [<ffffffffc0109dbd>] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888693] [<ffffffffc024bd6a>] intel_fbdev_set_par+0x1a/0x60 [i915] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888694] [<ffffffff8146ed20>] fbcon_init+0x570/0x5f0 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888696] [<ffffffff8150167a>] visual_init+0xca/0x130 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888698] [<ffffffff81502fb1>] do_bind_con_driver+0x1c1/0x3a0 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888699] [<ffffffff815034c9>] do_take_over_console+0x149/0x1a0 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888701] [<ffffffff8146ab87>] do_fbcon_takeover+0x57/0xb0 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888702] [<ffffffff8146f798>] fbcon_event_notify+0x658/0x750 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888703] [<ffffffff810a407a>] notifier_call_chain+0x4a/0x70 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888705] [<ffffffff810a43b7>] __blocking_notifier_call_chain+0x47/0x60 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888706] [<ffffffff810a43e6>] blocking_notifier_call_chain+0x16/0x20 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888707] [<ffffffff8147559b>] fb_notifier_call_chain+0x1b/0x20 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888708] [<ffffffff814775a3>] register_framebuffer+0x213/0x370 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888712] [<ffffffffc010a06a>] drm_fb_helper_initial_config+0x28a/0x420 [drm_kms_helper] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888729] [<ffffffffc024c91f>] intel_fbdev_initial_config+0x1f/0x30 [i915] Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888731] [<ffffffff810a5bd8>] async_run_entry_fn+0x48/0x150 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888732] [<ffffffff8109ca25>] process_one_work+0x165/0x480 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888734] [<ffffffff8109cd8b>] worker_thread+0x4b/0x500 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888735] [<ffffffff8109cd40>] ? process_one_work+0x480/0x480 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888736] [<ffffffff810a3178>] kthread+0xd8/0xf0 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888738] [<ffffffff8183fb62>] ret_from_fork+0x22/0x40 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888739] [<ffffffff810a30a0>] ? kthread_create_on_node+0x1a0/0x1a0 Apr 18 21:55:26 minmax-ThinkPad-X260 kernel: [ 2.888740] ---[ end trace e03767ef15b72de7 ]---</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>