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*zensiert* n00b
Joined: 10 Oct 2004 Posts: 55 Location: Germany
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Posted: Tue Jul 05, 2016 8:10 pm Post subject: 4K screen doesn't work with 60Hz on Intel graphics |
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Hi there,
I've got a Thinkpad T460p (with Intel Graphics) and a LG 27MU67-B screen, which supports a resolution up to 3840x2160.
My problem is that I only can get the resolution 3840x2160 to work @ 30Hz. As soon as I select 60Hz the screen stays blank. 1920x1080 works @60Hz.
However, xrandr recognizes that the screen supports 60Hz:
Code: |
DP3-1 connected 3840x2160+2560+0 (normal left inverted right x axis y axis) 600mm x 340mm
3840x2160 60.00 + 30.00*
1920x1080 60.00 59.94
1600x900 60.00
1280x1024 60.02
1280x800 59.81
1152x864 59.97
1280x720 60.00 59.94
1024x768 60.00
800x600 60.32
720x480 60.00 59.94
640x480 60.00 59.94
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I tried different cables and ports:
- miniDisplayPort on the side of the laptop
- DisplayPort on the UltraDock docking station
- HDMI port on the laptop
- HDMI port on the UltraDock
I used cables which came with the screen, so this shouldn't be an issue.
I'm using Gentoo with kernel gentoo-sources-4.6.0 and xf86-video-intel-2.99.917_p20160621-r1
Any ideas or suggestions how I could get 60Hz to work?
Thanks! |
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chithanh Developer
Joined: 05 Aug 2006 Posts: 2158 Location: Berlin, Germany
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Posted: Tue Jul 05, 2016 9:27 pm Post subject: |
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Which resolution do you use on the console?
For 3840x2160@60 Hz, the DisplayPort needs to negotiate HBR2 transfer mode. Maybe that failed for some reason. If dmesg doesn't contain any hints, you can use the drm.debug=... kernel parameter to increase debug verbosity. |
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*zensiert* n00b
Joined: 10 Oct 2004 Posts: 55 Location: Germany
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Posted: Tue Jul 05, 2016 9:50 pm Post subject: |
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chithanh wrote: | Which resolution do you use on the console?
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Console is at 1280x1024, but that was selected automatically.
chithanh wrote: |
For 3840x2160@60 Hz, the DisplayPort needs to negotiate HBR2 transfer mode. Maybe that failed for some reason. If dmesg doesn't contain any hints, you can use the drm.debug=... kernel parameter to increase debug verbosity. |
Good hint, I didn't check dmesg so far, but found some errors which might be related to my issue:
Code: | [ 2.303018] ------------[ cut here ]------------
[ 2.303021] WARNING: CPU: 3 PID: 59 at drivers/gpu/drm/i915/intel_pm.c:3586 skl_update_other_pipe_wm+0x114/0x120
[ 2.303022] WARN_ON(!wm_changed)
[ 2.303022] Modules linked in:
[ 2.303023] CPU: 3 PID: 59 Comm: kworker/3:1 Not tainted 4.6.0-gentoo #1
[ 2.303024] Hardware name: LENOVO 20FWCTO1WW/20FWCTO1WW, BIOS R07ET63W (2.03 ) 03/15/2016
[ 2.303026] Workqueue: events_long drm_dp_mst_link_probe_work
[ 2.303027] 0000000000000000 ffff88042faff8f8 ffffffff81299908 ffff88042faff948
[ 2.303028] 0000000000000000 ffff88042faff938 ffffffff81052e0c 00000e0200000001
[ 2.303029] ffff88042fc22000 ffff88042fc23000 ffff88042fb09d6c ffff88042f8baba8
[ 2.303029] Call Trace:
[ 2.303032] [<ffffffff81299908>] dump_stack+0x4d/0x65
[ 2.303033] [<ffffffff81052e0c>] __warn+0xcc/0xf0
[ 2.303035] [<ffffffff81052e7a>] warn_slowpath_fmt+0x4a/0x50
[ 2.303036] [<ffffffff813aed04>] skl_update_other_pipe_wm+0x114/0x120
[ 2.303037] [<ffffffff813aee49>] skl_update_wm+0x139/0x5d0
[ 2.303039] [<ffffffff814358de>] ? intel_ddi_enable_transcoder_func+0x16e/0x240
[ 2.303040] [<ffffffff813b0289>] intel_update_watermarks+0x19/0x20
[ 2.303041] [<ffffffff81419d6c>] haswell_crtc_enable+0x31c/0x890
[ 2.303043] [<ffffffff81406019>] ? intel_finish_crtc_commit+0x9/0x10
[ 2.303044] [<ffffffff813747d0>] ? drm_atomic_helper_commit_planes_on_crtc+0x150/0x270
[ 2.303045] [<ffffffff814159d8>] intel_atomic_commit+0x628/0x1570
[ 2.303047] [<ffffffff81397602>] ? drm_atomic_add_affected_connectors+0x22/0xf0
[ 2.303048] [<ffffffff81397122>] drm_atomic_commit+0x32/0x50
[ 2.303048] [<ffffffff813756b2>] restore_fbdev_mode+0x232/0x260
[ 2.303049] [<ffffffff81395ff5>] ? drm_modeset_lock_all_ctx+0x95/0xb0
[ 2.303050] [<ffffffff8137786e>] drm_fb_helper_restore_fbdev_mode_unlocked+0x2e/0x70
[ 2.303051] [<ffffffff813778d8>] drm_fb_helper_set_par+0x28/0x50
[ 2.303052] [<ffffffff813777ed>] drm_fb_helper_hotplug_event+0x9d/0xf0
[ 2.303053] [<ffffffff8142d169>] intel_fbdev_output_poll_changed+0x19/0x20
[ 2.303054] [<ffffffff8136b3f2>] drm_kms_helper_hotplug_event+0x22/0x30
[ 2.303055] [<ffffffff81437300>] intel_dp_mst_hotplug+0x10/0x20
[ 2.303056] [<ffffffff8137100d>] drm_dp_send_link_address+0x18d/0x210
[ 2.303057] [<ffffffff8108608b>] ? pick_next_task_fair+0x12b/0x470
[ 2.303058] [<ffffffff81371138>] drm_dp_check_and_send_link_address+0xa8/0xb0
[ 2.303060] [<ffffffff81371193>] drm_dp_mst_link_probe_work+0x53/0xb0
[ 2.303061] [<ffffffff8106a146>] process_one_work+0x146/0x3f0
[ 2.303061] [<ffffffff8106a8b6>] worker_thread+0x46/0x470
[ 2.303062] [<ffffffff8106a870>] ? max_active_store+0x60/0x60
[ 2.303063] [<ffffffff8106a870>] ? max_active_store+0x60/0x60
[ 2.303064] [<ffffffff8106f434>] kthread+0xc4/0xe0
[ 2.303065] [<ffffffff816c0752>] ret_from_fork+0x22/0x40
[ 2.303066] [<ffffffff8106f370>] ? kthread_park+0x50/0x50
[ 2.303067] ---[ end trace d6237fc6e26cda1f ]---
...
[ 3.246568] [drm:intel_mst_disable_dp] *ERROR* failed to update payload -22
[ 3.263300] ------------[ cut here ]------------
[ 3.263306] WARNING: CPU: 1 PID: 60 at drivers/gpu/drm/i915/intel_pm.c:3586 skl_update_other_pipe_wm+0x114/0x120
[ 3.263314] WARN_ON(!wm_changed)
[ 3.263316] Modules linked in:
[ 3.263318] CPU: 1 PID: 60 Comm: kworker/1:1 Tainted: G W 4.6.0-gentoo #1
[ 3.263319] Hardware name: LENOVO 20FWCTO1WW/20FWCTO1WW, BIOS R07ET63W (2.03 ) 03/15/2016
[ 3.263322] Workqueue: events drm_dp_destroy_connector_work
[ 3.263323] 0000000000000000 ffff88042fabba60 ffffffff81299908 ffff88042fabbab0
[ 3.263324] 0000000000000000 ffff88042fabbaa0 ffffffff81052e0c 00000e0200000000
[ 3.263325] ffff88042fc22000 ffff88042fc23000 ffff88042fb09d6c ffff88042f8baba8
[ 3.263325] Call Trace:
[ 3.263328] [<ffffffff81299908>] dump_stack+0x4d/0x65
[ 3.263330] [<ffffffff81052e0c>] __warn+0xcc/0xf0
[ 3.263331] [<ffffffff81052e7a>] warn_slowpath_fmt+0x4a/0x50
[ 3.263333] [<ffffffff813aed04>] skl_update_other_pipe_wm+0x114/0x120
[ 3.263334] [<ffffffff813aee49>] skl_update_wm+0x139/0x5d0
[ 3.263335] [<ffffffff813b806b>] ? intel_display_power_put+0xcb/0x130
[ 3.263337] [<ffffffff813b0289>] intel_update_watermarks+0x19/0x20
[ 3.263338] [<ffffffff81415822>] intel_atomic_commit+0x472/0x1570
[ 3.263341] [<ffffffff8139647a>] ? drm_atomic_set_crtc_for_connector+0x2a/0xe0
[ 3.263342] [<ffffffff81397122>] drm_atomic_commit+0x32/0x50
[ 3.263343] [<ffffffff81374fc6>] drm_atomic_helper_set_config+0x76/0xb0
[ 3.263345] [<ffffffff814373a1>] intel_dp_destroy_mst_connector+0x51/0xe0
[ 3.263346] [<ffffffff81370226>] drm_dp_destroy_connector_work+0xa6/0x150
[ 3.263348] [<ffffffff8106a146>] process_one_work+0x146/0x3f0
[ 3.263348] [<ffffffff8106a8b6>] worker_thread+0x46/0x470
[ 3.263349] [<ffffffff8106a870>] ? max_active_store+0x60/0x60
[ 3.263350] [<ffffffff8106f434>] kthread+0xc4/0xe0
[ 3.263352] [<ffffffff816c0752>] ret_from_fork+0x22/0x40
[ 3.263353] [<ffffffff8106f370>] ? kthread_park+0x50/0x50
[ 3.263354] ---[ end trace d6237fc6e26cda20 ]---
...
[ 3.929558] ------------[ cut here ]------------
[ 3.929563] WARNING: CPU: 3 PID: 24 at drivers/gpu/drm/i915/intel_pm.c:3586 skl_update_other_pipe_wm+0x114/0x120
[ 3.929564] WARN_ON(!wm_changed)
[ 3.929565] Modules linked in:
[ 3.929566] arc4 rtsx_pci_sdmmc mmc_core iwlmvm kvm_intel mac80211 kvm irqbypass input_leds e1000e iwlwifi mei_me mei cfg80211 rtsx_pci mfd_core thinkpad_acpi led_class
[ 3.929574] CPU: 3 PID: 24 Comm: kworker/3:0 Tainted: G W 4.6.0-gentoo #1
[ 3.929575] Hardware name: LENOVO 20FWCTO1WW/20FWCTO1WW, BIOS R07ET63W (2.03 ) 03/15/2016
[ 3.929578] Workqueue: events_long drm_dp_mst_link_probe_work
[ 3.929579] 0000000000000000 ffff8804302ef8f8 ffffffff81299908 ffff8804302ef948
[ 3.929580] 0000000000000000 ffff8804302ef938 ffffffff81052e0c 00000e0200000001
[ 3.929582] ffff88042fc22000 ffff88042fc23000 ffff88042fb09d6c ffff88042f8baba8
[ 3.929583] Call Trace:
[ 3.929586] [<ffffffff81299908>] dump_stack+0x4d/0x65
[ 3.929601] [<ffffffff81052e0c>] __warn+0xcc/0xf0
[ 3.929603] [<ffffffff81052e7a>] warn_slowpath_fmt+0x4a/0x50
[ 3.929604] [<ffffffff813aed04>] skl_update_other_pipe_wm+0x114/0x120
[ 3.929606] [<ffffffff813aee49>] skl_update_wm+0x139/0x5d0
[ 3.929608] [<ffffffff814358de>] ? intel_ddi_enable_transcoder_func+0x16e/0x240
[ 3.929610] [<ffffffff813b0289>] intel_update_watermarks+0x19/0x20
[ 3.929611] [<ffffffff81419d6c>] haswell_crtc_enable+0x31c/0x890
[ 3.929613] [<ffffffff81406019>] ? intel_finish_crtc_commit+0x9/0x10
[ 3.929615] [<ffffffff813747d0>] ? drm_atomic_helper_commit_planes_on_crtc+0x150/0x270
[ 3.929616] [<ffffffff814159d8>] intel_atomic_commit+0x628/0x1570
[ 3.929618] [<ffffffff81397602>] ? drm_atomic_add_affected_connectors+0x22/0xf0
[ 3.929620] [<ffffffff81397122>] drm_atomic_commit+0x32/0x50
[ 3.929621] [<ffffffff813756b2>] restore_fbdev_mode+0x232/0x260
[ 3.929622] [<ffffffff81395ff5>] ? drm_modeset_lock_all_ctx+0x95/0xb0
[ 3.929623] [<ffffffff8137786e>] drm_fb_helper_restore_fbdev_mode_unlocked+0x2e/0x70
[ 3.929624] [<ffffffff813778d8>] drm_fb_helper_set_par+0x28/0x50
[ 3.929625] [<ffffffff813777ed>] drm_fb_helper_hotplug_event+0x9d/0xf0
[ 3.929626] [<ffffffff8142d169>] intel_fbdev_output_poll_changed+0x19/0x20
[ 3.929628] [<ffffffff8136b3f2>] drm_kms_helper_hotplug_event+0x22/0x30
[ 3.929629] [<ffffffff81437300>] intel_dp_mst_hotplug+0x10/0x20
[ 3.929631] [<ffffffff8137100d>] drm_dp_send_link_address+0x18d/0x210
[ 3.929633] [<ffffffff8108635b>] ? pick_next_task_fair+0x3fb/0x470
[ 3.929634] [<ffffffff81371138>] drm_dp_check_and_send_link_address+0xa8/0xb0
[ 3.929636] [<ffffffff81371193>] drm_dp_mst_link_probe_work+0x53/0xb0
[ 3.929638] [<ffffffff8106a146>] process_one_work+0x146/0x3f0
[ 3.929639] [<ffffffff8106a8b6>] worker_thread+0x46/0x470
[ 3.929640] [<ffffffff8106a870>] ? max_active_store+0x60/0x60
[ 3.929641] [<ffffffff8106f434>] kthread+0xc4/0xe0
[ 3.929643] [<ffffffff816c0752>] ret_from_fork+0x22/0x40
[ 3.929644] [<ffffffff8106f370>] ? kthread_park+0x50/0x50
[ 3.929645] ---[ end trace d6237fc6e26cda21 ]---
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Any idea how I can fix this? |
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chithanh Developer
Joined: 05 Aug 2006 Posts: 2158 Location: Berlin, Germany
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Posted: Tue Jul 05, 2016 10:07 pm Post subject: |
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You do have the Skylake firmware installed and it is loaded properly during boot, yes?
These messages are possibly unrelated to your problem, see https://bugs.freedesktop.org/show_bug.cgi?id=95521
You could try to force the console to higher resolution with the video=3840x2160 kernel parameter, but that might fail too. You could try a newer kernel (4.7-rc6) and if that still doesn't work report a bug at https://bugs.freedesktop.org/ |
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*zensiert* n00b
Joined: 10 Oct 2004 Posts: 55 Location: Germany
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Posted: Tue Jul 05, 2016 10:25 pm Post subject: |
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chithanh wrote: | You do have the Skylake firmware installed and it is loaded properly during boot, yes?
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I've got sys-kernel/linux-firmware-20160331 installed. However, I found this message in dmesg:
Code: |
[ 0.360307] i915 0000:00:02.0: enabling device (0006 -> 0007)
[ 0.371619] i915 0000:00:02.0: Direct firmware load for i915/skl_dmc_ver1.bin failed with error -2
[ 0.371623] i915 0000:00:02.0: Failed to load DMC firmware [https://01.org/linuxgraphics/intel-linux-graphics-firmwares], disabling runtime power management.
[ 0.387539] [drm] Initialized i915 1.6.0 20160229 for 0000:00:02.0 on minor 0
[ 2.303021] WARNING: CPU: 3 PID: 59 at drivers/gpu/drm/i915/intel_pm.c:3586 skl_update_other_pipe_wm+0x114/0x120
[ 2.634293] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[ 3.263306] WARNING: CPU: 1 PID: 60 at drivers/gpu/drm/i915/intel_pm.c:3586 skl_update_other_pipe_wm+0x114/0x120
[ 3.929563] WARNING: CPU: 3 PID: 24 at drivers/gpu/drm/i915/intel_pm.c:3586 skl_update_other_pipe_wm+0x114/0x120
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Edit: I guess I haven't set the kernel parameters CONFIG_EXTRA_FIRMWARE and CONFIG_EXTRA_FIRMWARE_DIR. I just changed that and will retry with a newly built kernel. |
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chithanh Developer
Joined: 05 Aug 2006 Posts: 2158 Location: Berlin, Germany
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Posted: Tue Jul 05, 2016 10:39 pm Post subject: |
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If you have the i915 driver built into your kernel, then you need the firmware built-in too.
You can set the following in your kernel config:
Code: | CONFIG_EXTRA_FIRMWARE="i915/skl_dmc_ver1.bin i915/skl_guc_ver1.bin"
CONFIG_EXTRA_FIRMWARE_DIR="/lib/firmware" |
(if dmesg still complains about missing firmware files, you need to add them too) |
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*zensiert* n00b
Joined: 10 Oct 2004 Posts: 55 Location: Germany
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Posted: Tue Jul 05, 2016 10:51 pm Post subject: |
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Thanks for your help, chithanh!
I recompiled the kernel with the firmware, it now seems to load fine:
Code: |
[ 0.377983] [drm] Finished loading i915/skl_dmc_ver1.bin (v1.26)
[ 0.391256] [drm] Initialized i915 1.6.0 20160229 for 0000:00:02.0 on minor 0
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However, I still cannot switch into 60Hz mode. This is the error which appeared when calling xrandr to set 60Hz:
Code: | [ 119.231697] ------------[ cut here ]------------
[ 119.231712] WARNING: CPU: 0 PID: 1617 at drivers/gpu/drm/i915/intel_display.c:13929 skl_max_scale.part.100+0x6a/0x80
[ 119.231716] WARN_ON_ONCE(!crtc_clock || cdclk < crtc_clock)
[ 119.231718] Modules linked in:
[ 119.231722] rfcomm acpi_call(O) bnep twofish_x86_64_3way lrw glue_helper twofish_x86_64 twofish_common dm_crypt dm_mod loop fuse btusb btrtl btbcm btintel bluetooth arc4 iwlmvm rtsx_pci_sdmmc mac80211 kvm_intel mmc_core kvm irqbypass iwlwifi input_leds cfg80211 rtsx_pci mfd_core mei_me mei thinkpad_acpi led_class
[ 119.231768] CPU: 0 PID: 1617 Comm: X Tainted: G W O 4.6.0-gentoo #3
[ 119.231771] Hardware name: LENOVO 20FWCTO1WW/20FWCTO1WW, BIOS R07ET63W (2.03 ) 03/15/2016
[ 119.231775] 0000000000000000 ffff8800ad6e7a30 ffffffff81299908 ffff8800ad6e7a80
[ 119.231781] 0000000000000000 ffff8800ad6e7a70 ffffffff81052e0c 0000366900000870
[ 119.231787] ffff88042bc41900 ffff88042fa83800 ffff880431c36000 ffff88042fa83800
[ 119.231792] Call Trace:
[ 119.231801] [<ffffffff81299908>] dump_stack+0x4d/0x65
[ 119.231809] [<ffffffff81052e0c>] __warn+0xcc/0xf0
[ 119.231816] [<ffffffff81052e7a>] warn_slowpath_fmt+0x4a/0x50
[ 119.231820] [<ffffffff8140af7a>] skl_max_scale.part.100+0x6a/0x80
[ 119.231824] [<ffffffff8140b04b>] intel_check_primary_plane+0xbb/0xd0
[ 119.231830] [<ffffffff8143cbe8>] ? intel_dp_source_rates+0x48/0x80
[ 119.231834] [<ffffffff8143cc66>] ? intel_dp_common_rates+0x46/0xd0
[ 119.231841] [<ffffffff813fddd9>] intel_plane_atomic_check+0x129/0x1f0
[ 119.231849] [<ffffffff813737f3>] drm_atomic_helper_check_planes+0x43/0x1d0
[ 119.231855] [<ffffffff81417606>] intel_atomic_check+0x2f6/0x1180
[ 119.231861] [<ffffffff816dbd01>] ? __ww_mutex_lock_slowpath+0x111/0x1b0
[ 119.231868] [<ffffffff81396bee>] drm_atomic_check_only+0x13e/0x640
[ 119.231873] [<ffffffff813964a2>] ? drm_atomic_set_crtc_for_connector+0x52/0xe0
[ 119.231878] [<ffffffff81397102>] drm_atomic_commit+0x12/0x50
[ 119.231885] [<ffffffff81374fc6>] drm_atomic_helper_set_config+0x76/0xb0
[ 119.231890] [<ffffffff81387d1d>] drm_mode_set_config_internal+0x5d/0xf0
[ 119.231896] [<ffffffff8138b553>] drm_mode_setcrtc+0x183/0x4e0
[ 119.231901] [<ffffffff8137d67d>] drm_ioctl+0x13d/0x560
[ 119.231907] [<ffffffff8138b3d0>] ? drm_mode_setplane+0x1b0/0x1b0
[ 119.231915] [<ffffffff81185ba9>] do_vfs_ioctl+0x89/0x580
[ 119.231920] [<ffffffff8105f08d>] ? __set_task_blocked+0x2d/0x70
[ 119.231926] [<ffffffff81175a6c>] ? __sb_end_write+0x1c/0x20
[ 119.231931] [<ffffffff81061621>] ? __set_current_blocked+0x31/0x50
[ 119.231937] [<ffffffff811860dc>] SyS_ioctl+0x3c/0x70
[ 119.231941] [<ffffffff81061881>] ? SyS_rt_sigprocmask+0x81/0xa0
[ 119.231947] [<ffffffff816de09b>] entry_SYSCALL_64_fastpath+0x13/0x8f
[ 119.231951] ---[ end trace 5cf240cb25d2429d ]---
[ 119.304372] [drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B FIFO underrun
[ 134.530287] [drm:intel_mst_disable_dp] *ERROR* failed to update payload -22
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chithanh Developer
Joined: 05 Aug 2006 Posts: 2158 Location: Berlin, Germany
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Posted: Tue Jul 05, 2016 10:54 pm Post subject: |
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I think this error is related to the dock as per the freedesktop bug above.
Can you try booting the system undocked and see if something changes? |
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*zensiert* n00b
Joined: 10 Oct 2004 Posts: 55 Location: Germany
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Posted: Tue Jul 05, 2016 11:03 pm Post subject: |
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chithanh wrote: | I think this error is related to the dock as per the freedesktop bug above.
Can you try booting the system undocked and see if something changes? |
Nope. I rebooted without the dock. I then attached the screen using a MiniDP-Cable, the picture appeared @30Hz. No errors in dmesg until this point. But when I changed to 60Hz I got the exact same error message. |
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chithanh Developer
Joined: 05 Aug 2006 Posts: 2158 Location: Berlin, Germany
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Posted: Tue Jul 05, 2016 11:06 pm Post subject: |
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Ok, then I am out of ideas. If the latest 4.7-rc kernel does not improve the situation, you can create a bug report at https://bugs.freedesktop.org/ so the Intel upstream can look into it. |
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*zensiert* n00b
Joined: 10 Oct 2004 Posts: 55 Location: Germany
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Posted: Tue Jul 05, 2016 11:14 pm Post subject: |
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OK, I'll try a newer kernel in the next days and let you know if that helped.
Thanks for your help and support, much appreciated! |
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*zensiert* n00b
Joined: 10 Oct 2004 Posts: 55 Location: Germany
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chithanh Developer
Joined: 05 Aug 2006 Posts: 2158 Location: Berlin, Germany
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Posted: Wed Jul 06, 2016 8:37 am Post subject: |
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Good. To give upstream some more information, boot with log_buf_len=1M drm.debug=14 kernel parameters, try to set 4K@60 Hz, and then capture the entire dmesg output and attach to the bug. |
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*zensiert* n00b
Joined: 10 Oct 2004 Posts: 55 Location: Germany
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Posted: Wed Jul 27, 2016 10:14 pm Post subject: |
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I tried again today using the new kernel 4.7.0, but the problem remains.
As you suggested, I added the kernel parameters and attached the log output to the bug. |
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