<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#c14">Comment # 14</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:Oliver.Deppert@gmail.com" title="Oliver Deppert <Oliver.Deppert@gmail.com>"> Oliver Deppert</a> <pre>Hi all, some updates...In my opinion, the kernel crashes are not related to the HDMI port of the DLA200...I can reproduce the same kernel errors/crashes while a VGA monitor is attached to it. The error/crash only occurs if a monitor is started/initialized. e.g. just connecting a DLA200 with monitors attached to USB-C doesn't produce the kernel crash. As soon as the monitor is initialized, e.g. by display settings of XFCE the kernel crashes and leads to the following dmesg (here with VGA port): [ 402.077936] ------------[ cut here ]------------ [ 402.077941] WARNING: CPU: 0 PID: 4081 at drivers/gpu/drm/i915/intel_pm.c:3597 skl_update_other_pipe_wm+0x168/0x170() [ 402.077942] WARN_ON(!wm_changed) [ 402.077943] Modules linked in: [ 402.077943] hid_roccat_koneplus hid_roccat hid_roccat_common fuse snd_usb_audio snd_usbmidi_lib snd_rawmidi uinput uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev kvm_intel kvm irqbypass [ 402.077950] CPU: 0 PID: 4081 Comm: X Tainted: G W 4.4.0-gentoo-r1 #21 [ 402.077951] Hardware name: Dell Inc. XPS 15 9550/0N7TVV, BIOS 01.01.19 01/25/2016 [ 402.077952] ffffffff81abf5f0 ffffffff81378883 ffff8804abdab850 ffffffff810867a7 [ 402.077953] ffff8804af2d6000 ffff8804abdab8a0 ffff8804af2e7000 0000000000000000 [ 402.077954] ffff8804ae51ab78 ffffffff81086827 ffffffff81af8724 ffff880400000020 [ 402.077955] Call Trace: [ 402.077958] [<ffffffff81378883>] ? dump_stack+0x40/0x5d [ 402.077960] [<ffffffff810867a7>] ? warn_slowpath_common+0x77/0xb0 [ 402.077961] [<ffffffff81086827>] ? warn_slowpath_fmt+0x47/0x50 [ 402.077962] [<ffffffff81482588>] ? skl_update_other_pipe_wm+0x168/0x170 [ 402.077964] [<ffffffff8148276e>] ? skl_update_wm+0x1de/0x660 [ 402.077965] [<ffffffff814bcbb2>] ? gen9_read32+0x112/0x280 [ 402.077966] [<ffffffff814bd230>] ? gen9_write8+0x290/0x290 [ 402.077968] [<ffffffff814dfb29>] ? haswell_crtc_enable+0x369/0x880 [ 402.077969] [<ffffffff814db985>] ? intel_atomic_commit+0x365/0x1290 [ 402.077971] [<ffffffff8144b21f>] ? drm_atomic_helper_check_planes+0x12f/0x1a0 [ 402.077972] [<ffffffff8144cffd>] ? drm_atomic_helper_set_config+0x6d/0xa0 [ 402.077974] [<ffffffff8145d749>] ? drm_mode_set_config_internal+0x59/0xf0 [ 402.077975] [<ffffffff8146152d>] ? drm_mode_setcrtc+0x17d/0x4d0 [ 402.077976] [<ffffffff814547be>] ? drm_ioctl+0x10e/0x460 [ 402.077977] [<ffffffff814613b0>] ? drm_mode_setplane+0x1b0/0x1b0 [ 402.077978] [<ffffffff8116a9e1>] ? dput+0x21/0x1f0 [ 402.077979] [<ffffffff8116750f>] ? do_vfs_ioctl+0x2bf/0x490 [ 402.077981] [<ffffffff81155ea1>] ? vfs_write+0x151/0x180 [ 402.077982] [<ffffffff81167751>] ? SyS_ioctl+0x71/0x80 [ 402.077983] [<ffffffff818b56d7>] ? entry_SYSCALL_64_fastpath+0x12/0x6a [ 402.077984] ---[ end trace 6c5d166990af9294 ]--- [ 402.077985] ------------[ cut here ]------------ [ 402.077987] WARNING: CPU: 0 PID: 4081 at drivers/gpu/drm/i915/intel_pm.c:3597 skl_update_other_pipe_wm+0x168/0x170() [ 402.077987] WARN_ON(!wm_changed) [ 402.077987] Modules linked in: [ 402.077988] hid_roccat_koneplus hid_roccat hid_roccat_common fuse snd_usb_audio snd_usbmidi_lib snd_rawmidi uinput uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev kvm_intel kvm irqbypass [ 402.077992] CPU: 0 PID: 4081 Comm: X Tainted: G W 4.4.0-gentoo-r1 #21 [ 402.077993] Hardware name: Dell Inc. XPS 15 9550/0N7TVV, BIOS 01.01.19 01/25/2016 [ 402.077993] ffffffff81abf5f0 ffffffff81378883 ffff8804abdab850 ffffffff810867a7 [ 402.077994] ffff8804af2e4000 ffff8804abdab8a0 ffff8804af2e7000 0000000000000000 [ 402.077995] ffff8804ae51ab78 ffffffff81086827 ffffffff81af8724 ffff880400000020 [ 402.077996] Call Trace: [ 402.077997] [<ffffffff81378883>] ? dump_stack+0x40/0x5d [ 402.077998] [<ffffffff810867a7>] ? warn_slowpath_common+0x77/0xb0 [ 402.077999] [<ffffffff81086827>] ? warn_slowpath_fmt+0x47/0x50 [ 402.078000] [<ffffffff81482588>] ? skl_update_other_pipe_wm+0x168/0x170 [ 402.078002] [<ffffffff8148276e>] ? skl_update_wm+0x1de/0x660 [ 402.078002] [<ffffffff814bcbb2>] ? gen9_read32+0x112/0x280 [ 402.078003] [<ffffffff814bd230>] ? gen9_write8+0x290/0x290 [ 402.078005] [<ffffffff814dfb29>] ? haswell_crtc_enable+0x369/0x880 [ 402.078006] [<ffffffff814db985>] ? intel_atomic_commit+0x365/0x1290 [ 402.078007] [<ffffffff8144b21f>] ? drm_atomic_helper_check_planes+0x12f/0x1a0 [ 402.078008] [<ffffffff8144cffd>] ? drm_atomic_helper_set_config+0x6d/0xa0 [ 402.078010] [<ffffffff8145d749>] ? drm_mode_set_config_internal+0x59/0xf0 [ 402.078011] [<ffffffff8146152d>] ? drm_mode_setcrtc+0x17d/0x4d0 [ 402.078011] [<ffffffff814547be>] ? drm_ioctl+0x10e/0x460 [ 402.078012] [<ffffffff814613b0>] ? drm_mode_setplane+0x1b0/0x1b0 [ 402.078013] [<ffffffff8116a9e1>] ? dput+0x21/0x1f0 [ 402.078014] [<ffffffff8116750f>] ? do_vfs_ioctl+0x2bf/0x490 [ 402.078015] [<ffffffff81155ea1>] ? vfs_write+0x151/0x180 [ 402.078016] [<ffffffff81167751>] ? SyS_ioctl+0x71/0x80 [ 402.078017] [<ffffffff818b56d7>] ? entry_SYSCALL_64_fastpath+0x12/0x6a [ 402.078017] ---[ end trace 6c5d166990af9295 ]--- [ 402.290190] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to bit banging on pin 5 [ 402.439199] [drm] GMBUS [i915 gmbus dpc] timed out, falling back to bit banging on pin 4 The internal HDMI port of the netbook seems to work without any kernel crash. During boot phase with attached monitors to the DLA200 the kernel crashes immediately, cause framebuffer tries to initialize the attached monitors quite early. regards, Oliver</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 assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>