Created attachment 119054 [details] Complete dmesg file Starting with linux-4.3-rc1 and through to the current 4.3-rc6 sources from Linus' tree, the error message -- [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0! -- followed by -- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6 at drivers/gpu/drm/drm_atomic.c:491 drm_atomic_check_only+0x399/0x540 [drm]() Modules linked in: ahci(+) libahci libata firewire_ohci(+) firewire_core crc_itu_t yenta_socket(+) tg3 ptp pps_core i915(+) i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm video CPU: 1 PID: 6 Comm: kworker/u4:0 Not tainted 4.3.0-0.rc1.el7.elrepo.x86_64 #1 Hardware name: Dell Inc. Latitude E5500 /0DW633, BIOS A19 06/13/2013 Workqueue: events_unbound async_run_entry_fn 0000000000000000 0000000011057432 ffff88011abdfa10 ffffffff8131e6b0 0000000000000000 ffff88011abdfa48 ffffffff8107ae96 ffff880037303000 0000000000000000 0000000000000000 0000000000000000 ffff880037bfb600 Call Trace: [<ffffffff8131e6b0>] dump_stack+0x44/0x64 [<ffffffff8107ae96>] warn_slowpath_common+0x86/0xc0 [<ffffffff8107afda>] warn_slowpath_null+0x1a/0x20 [<ffffffffa002f529>] drm_atomic_check_only+0x399/0x540 [drm] [<ffffffffa002f7bd>] ? drm_atomic_set_fb_for_plane+0x2d/0x90 [drm] [<ffffffffa002f6e7>] drm_atomic_commit+0x17/0x60 [drm] [<ffffffffa014f3d5>] intel_get_load_detect_pipe+0x395/0x540 [i915] [<ffffffffa018671a>] intel_tv_detect+0x13a/0x570 [i915] [<ffffffff81530080>] ? i2c_transfer+0x60/0xb0 [<ffffffffa016dc11>] ? intel_dp_detect+0x101/0x4f0 [i915] [<ffffffffa00a2d25>] drm_helper_probe_single_connector_modes_merge_bits+0x2e5/0x4a0 [drm_kms_helper] [<ffffffffa00a2ef3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper] [<ffffffffa00ace6d>] drm_fb_helper_probe_connector_modes.isra.3+0x4d/0x70 [drm_kms_helper] [<ffffffffa00ae05a>] drm_fb_helper_initial_config+0x5a/0x3c0 [drm_kms_helper] [<ffffffff810156b2>] ? __switch_to+0x202/0x490 [<ffffffffa015f44b>] intel_fbdev_initial_config+0x1b/0x20 [i915] [<ffffffff8109c0fa>] async_run_entry_fn+0x4a/0x140 [<ffffffff8109302c>] process_one_work+0x14c/0x3c0 [<ffffffff81093894>] worker_thread+0x114/0x470 [<ffffffff81093780>] ? rescuer_thread+0x310/0x310 [<ffffffff810993d8>] kthread+0xd8/0xf0 [<ffffffff81099300>] ? kthread_park+0x60/0x60 [<ffffffff816d02df>] ret_from_fork+0x3f/0x70 [<ffffffff81099300>] ? kthread_park+0x60/0x60 ---[ end trace a4f3b246a07cdefe ]--- -- and -- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 231 at drivers/gpu/drm/drm_atomic.c:491 drm_atomic_check_only+0x399/0x540 [drm]() Modules linked in: iwldvm(+) iTCO_wdt mac80211 iTCO_vendor_support snd_timer snd dell_wmi dell_rbtn dell_laptop gpio_ich sparse_keymap joydev sdhci_pci sdhci input_leds ppdev dcdbas coretemp dell_smm_hwmon iwlwifi lpc_ich mmc_core serio_raw kvm_intel pcspkr kvm wmi cfg80211 rfkill i2c_i801 mfd_core acpi_als soundcore parport_pc 8250_fintek kfifo_buf industrialio parport shpchp acpi_cpufreq xfs libcrc32c sr_mod cdrom sd_mod ahci libahci libata firewire_ohci firewire_core crc_itu_t yenta_socket tg3 ptp pps_core i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm video CPU: 0 PID: 231 Comm: kworker/0:3 Tainted: G W 4.3.0-0.rc1.el7.elrepo.x86_64 #1 Hardware name: Dell Inc. Latitude E5500 /0DW633, BIOS A19 06/13/2013 Workqueue: events output_poll_execute [drm_kms_helper] 0000000000000000 00000000fdb96593 ffff88003702ba10 ffffffff8131e6b0 0000000000000000 ffff88003702ba48 ffffffff8107ae96 ffff880037303000 0000000000000000 0000000000000000 0000000000000000 ffff8800d63f6200 Call Trace: [<ffffffff8131e6b0>] dump_stack+0x44/0x64 [<ffffffff8107ae96>] warn_slowpath_common+0x86/0xc0 [<ffffffff8107afda>] warn_slowpath_null+0x1a/0x20 [<ffffffffa002f529>] drm_atomic_check_only+0x399/0x540 [drm] [<ffffffffa002f7bd>] ? drm_atomic_set_fb_for_plane+0x2d/0x90 [drm] [<ffffffffa002f6e7>] drm_atomic_commit+0x17/0x60 [drm] [<ffffffffa014f3d5>] intel_get_load_detect_pipe+0x395/0x540 [i915] [<ffffffffa018671a>] intel_tv_detect+0x13a/0x570 [i915] [<ffffffff81530080>] ? i2c_transfer+0x60/0xb0 [<ffffffffa00a2d25>] drm_helper_probe_single_connector_modes_merge_bits+0x2e5/0x4a0 [drm_kms_helper] [<ffffffffa00a2ef3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper] [<ffffffffa00ace6d>] drm_fb_helper_probe_connector_modes.isra.3+0x4d/0x70 [drm_kms_helper] [<ffffffffa00adebe>] drm_fb_helper_hotplug_event+0x5e/0xe0 [drm_kms_helper] [<ffffffffa015f5ee>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915] [<ffffffffa00a25d7>] drm_kms_helper_hotplug_event+0x27/0x30 [drm_kms_helper] [<ffffffffa00a26ad>] output_poll_execute+0x6d/0x1d0 [drm_kms_helper] [<ffffffff8109302c>] process_one_work+0x14c/0x3c0 [<ffffffff81093894>] worker_thread+0x114/0x470 [<ffffffff816cbdef>] ? __schedule+0x2af/0x8b0 [<ffffffff81093780>] ? rescuer_thread+0x310/0x310 [<ffffffff810993d8>] kthread+0xd8/0xf0 [<ffffffff81099300>] ? kthread_park+0x60/0x60 [<ffffffff816d02df>] ret_from_fork+0x3f/0x70 [<ffffffff81099300>] ? kthread_park+0x60/0x60 ---[ end trace a4f3b246a07cdeff ]--- -- are displayed. Bisecting the kernel, the following "bad commit" is identified -- eddfcbcdc27fbecb33bff098967bbdd7ca75bfa6 is the first bad commit commit eddfcbcdc27fbecb33bff098967bbdd7ca75bfa6 Author: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Date: Mon Jun 15 12:33:53 2015 +0200 drm/i915: Update less state during modeset. No need to repeatedly call update_watermarks, or update_fbc. Down to a single call to update_watermarks in .crtc_enable Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Matt Roper <matthew.d.roper@intel.com> Tested-by(IVB): Matt Roper <matthew.d.roper@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> :040000 040000 0b47d48b159bb87bff39ae05095746d487c04372 43ac83106c605cce79c28811014ac41dd9069af8 M drivers
Probably fixed by commit 7f4c62840cc416986f983a8c68f7010c97e06daf Author: Ville Syrjälä <ville.syrjala@linux.intel.com> Date: Thu Sep 10 18:59:07 2015 +0300 drm/i915: Assign hwmode after encoder state readout I believe this was backported to v4.3 before release, as commit c4816c7389d8dbcad036be7e5a34584289d9f590 Author: Ville Syrjälä <ville.syrjala@linux.intel.com> Date: Thu Sep 10 18:59:07 2015 +0300 drm/i915: Assign hwmode after encoder state readout
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.