Bug 187571
| Summary: | HDMI unplug undetected, dmesg shows `WARNING: CPU: 0 PID: 38 at drivers/gpu/drm/i915/intel_dp.c:1062 intel_dp_aux_transfer+0x1dc/0x220 [i915] WARN_ON(!msg->buffer != !msg->size)` on boot | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | Leho Kraav (leho) |
| Component: | Video(Other) | Assignee: | drivers_video-other |
| Status: | RESOLVED INVALID | ||
| Severity: | normal | ||
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 4.9-rc5 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Attachments: | dmesg.txt | ||
Another worrying artifact of 4.9-rc4+ is that my laptop is not able to detect a HDMI connection unplugging anymore. When looking at the stack trace of the WARNING, `hotplug` and `link_status` stuff is involved in the chain. I wonder if these symptoms are related to each other. One suspend/resume cycle seems to properly reset the connector status. Gnome Display settings only shows the laptop panel now. Please file drm/i915 bugs at https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel Thanks. I wonder if https://bugs.freedesktop.org/show_bug.cgi?id=97344 is already the right one. |
Created attachment 244341 [details] dmesg.txt I'm getting a flood of these WARNINGs on boot. Did not happen on 4.8-series. ... nov 14 00:52:46 papaya kernel: [drm] Memory usable by graphics device = 2048M nov 14 00:52:46 papaya kernel: [drm] VT-d active for gfx access nov 14 00:52:46 papaya kernel: [drm] Replacing VGA console driver nov 14 00:52:46 papaya kernel: [drm] DMAR active, disabling use of stolen memory nov 14 00:52:46 papaya kernel: [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). nov 14 00:52:46 papaya kernel: [drm] Driver supports precise vblank timestamp query. nov 14 00:52:46 papaya kernel: vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem nov 14 00:52:46 papaya kernel: ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) nov 14 00:52:46 papaya kernel: input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input6 nov 14 00:52:46 papaya kernel: [drm] Initialized i915 1.6.0 20160919 for 0000:00:02.0 on minor 0 nov 14 00:52:46 papaya kernel: ------------[ cut here ]------------ nov 14 00:52:46 papaya kernel: WARNING: CPU: 0 PID: 38 at drivers/gpu/drm/i915/intel_dp.c:1062 intel_dp_aux_transfer+0x1dc/0x220 [i915] nov 14 00:52:46 papaya kernel: WARN_ON(!msg->buffer != !msg->size) nov 14 00:52:46 papaya kernel: Modules linked in: nov 14 00:52:46 papaya kernel: crc32_pclmul i915 fbcon bitblit softcursor font intel_gtt sdhci_pci sdhci mmc_core drm_kms_helper cfbfillrect syscopyarea cfbimgblt ehci_pci sysfillrect sysimgblt ehci_hcd fb_sys_ nov 14 00:52:46 papaya kernel: CPU: 0 PID: 38 Comm: kworker/0:1 Tainted: G U 4.9.0-rc5-bfq-gentoo+ #20 nov 14 00:52:46 papaya kernel: Hardware name: Dell Inc. Latitude E7440/0PC4X0, BIOS A18 04/28/2016 nov 14 00:52:46 papaya kernel: Workqueue: events i915_hotplug_work_func [i915] nov 14 00:52:46 papaya kernel: ffffc90000167b98 ffffffff8137adfb ffffc90000167be8 0000000000000000 nov 14 00:52:46 papaya kernel: ffffc90000167bd8 ffffffff810523cc 00000426607500e1 ffffc90000167ca8 nov 14 00:52:46 papaya kernel: ffff880407a800e0 0000000000000003 0000000000000000 ffff880407a80158 nov 14 00:52:46 papaya kernel: Call Trace: nov 14 00:52:46 papaya kernel: [<ffffffff8137adfb>] dump_stack+0x4d/0x72 nov 14 00:52:46 papaya kernel: [<ffffffff810523cc>] __warn+0xcc/0xf0 nov 14 00:52:46 papaya kernel: [<ffffffff8105243a>] warn_slowpath_fmt+0x4a/0x50 nov 14 00:52:46 papaya kernel: [<ffffffffa021a31c>] ? intel_dp_aux_transfer+0xcc/0x220 [i915] nov 14 00:52:46 papaya kernel: [<ffffffffa021a42c>] intel_dp_aux_transfer+0x1dc/0x220 [i915] nov 14 00:52:46 papaya kernel: [<ffffffffa00f0bc8>] drm_dp_dpcd_access+0x58/0xf0 [drm_kms_helper] nov 14 00:52:46 papaya kernel: [<ffffffffa00f0c76>] drm_dp_dpcd_write+0x16/0x20 [drm_kms_helper] nov 14 00:52:46 papaya kernel: [<ffffffffa0215cc8>] intel_dp_start_link_train+0x2a8/0x4c0 [i915] nov 14 00:52:46 papaya kernel: [<ffffffffa0217106>] intel_dp_check_link_status+0xb6/0xf0 [i915] nov 14 00:52:46 papaya kernel: [<ffffffffa021ba0b>] intel_dp_detect+0x72b/0xbb0 [i915] nov 14 00:52:46 papaya kernel: [<ffffffffa02049ff>] i915_hotplug_work_func+0x1df/0x2b0 [i915] nov 14 00:52:46 papaya kernel: [<ffffffff8106a3a0>] process_one_work+0x140/0x3e0 nov 14 00:52:46 papaya kernel: [<ffffffff8106a689>] worker_thread+0x49/0x480 nov 14 00:52:46 papaya kernel: [<ffffffff8106a640>] ? process_one_work+0x3e0/0x3e0 nov 14 00:52:46 papaya kernel: [<ffffffff8106a640>] ? process_one_work+0x3e0/0x3e0 nov 14 00:52:46 papaya kernel: [<ffffffff8106f9a5>] kthread+0xc5/0xe0 nov 14 00:52:46 papaya kernel: [<ffffffff8106f8e0>] ? kthread_park+0x60/0x60 nov 14 00:52:46 papaya kernel: [<ffffffff81632fd2>] ret_from_fork+0x22/0x30 nov 14 00:52:46 papaya kernel: ---[ end trace 60f064180c1be639 ]--- nov 14 00:52:46 papaya kernel: ------------[ cut here ]------------