<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#c19">Comment # 19</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:tommy@southdesign.de" title="Thomas Fankhauser <tommy@southdesign.de>"> Thomas Fankhauser</a> <pre>I can reproduce this Bug with the exact same Hardware (XPS 9350 and DA200 Adapter) on Linux 4.4.3-1-ARCH. After that I get the known skl Bug (<a class="bz_bug_link bz_status_REOPENED " title="REOPENED - [SKL ] WARN_ON(!wm_changed) hit in the WM code with multiple pipes enabled" href="show_bug.cgi?id=89055">https://bugs.freedesktop.org/show_bug.cgi?id=89055</a>): WARNING: CPU: 0 PID: 448 at drivers/gpu/drm/i915/intel_pm.c:3597 skl_update_other_pipe_wm+0x1e7/0x1f0 [i915]() CPU: 0 PID: 448 Comm: Xorg Tainted: G W 4.4.3-1-ARCH #1 Hardware name: Dell Inc. XPS 13 9350/0PWNCR, BIOS 1.2.3 01/08/2016 0000000000000286 000000005f8fc51e ffff880274eb37c8 ffffffff812cac81 ffff880274eb3810 ffffffffa01c8fc8 ffff880274eb3800 ffffffff810776e2 ffff880275129000 ffff880274eb3934 ffff88027512a000 0000000000000000 Call Trace: [<ffffffff812cac81>] dump_stack+0x63/0x82 [<ffffffff810776e2>] warn_slowpath_common+0x82/0xc0 [<ffffffff8107777c>] warn_slowpath_fmt+0x5c/0x80 [<ffffffffa00f9f47>] skl_update_other_pipe_wm+0x1e7/0x1f0 [i915] [<ffffffffa00fa1aa>] skl_update_wm+0x25a/0x750 [i915] [<ffffffff810e3130>] ? hrtimer_init+0x120/0x120 [<ffffffffa00fe4ee>] intel_update_watermarks+0x1e/0x30 [i915] [<ffffffffa0163622>] intel_atomic_commit+0x462/0x1430 [i915] [<ffffffffa00353ee>] ? drm_atomic_check_only+0x18e/0x590 [drm] [<ffffffffa0035827>] drm_atomic_commit+0x37/0x60 [drm] [<ffffffffa00a3fb6>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper] [<ffffffffa0023ef2>] drm_mode_set_config_internal+0x62/0x100 [drm] [<ffffffffa0028de2>] drm_mode_setcrtc+0x3d2/0x4f0 [drm]</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>