[Bug 96761] New: skylake dual monitor display freezes when using xserver-master, fine with xserver-1.18.x

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Jul 1 10:35:38 UTC 2016 

https://bugs.freedesktop.org/show_bug.cgi?id=96761

            Bug ID: 96761
           Summary: skylake dual monitor display freezes when using
                    xserver-master, fine with xserver-1.18.x
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: jwrdegoede at fedoraproject.org
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Hi,

I've been experiencing this freeze a couple of minutes (1-5 min) after login
into a gnome 3 sessopm, usually when using firefox.

I'm seeing this with Fedora kernel 4.6.3 and 4.7-rc4 (*) which contain a
backport of this series:
http://www.spinics.net/lists/intel-gfx/msg95595.html

Since that fixes a ton of skylake issues Fedora users are experiencing.

This works fine (excellent even) with the xserver shipped with Fedora-24, which
is 1.18.3, but when building the xserver from upstream master (as I'm a gfx
developer working on it) I hit this issue where
the screen freezes and Xorg is in an unkillable state. I can still ssh in and
do a "reboot --force".

I'm using the modesetting driver in both cases.

When this happens dmesg shows:

jun 30 18:33:31 shalem.localdomain kernel: ------------[ cut here ]------------
jun 30 18:33:31 shalem.localdomain kernel: WARNING: CPU: 1 PID: 1279 at
drivers/gpu/drm/drm_modeset_lock.c:184 drm_modeset_lock_crtc+0xf0/0x100 [drm]
jun 30 18:33:31 shalem.localdomain kernel: Modules linked in: fuse xt_CHECKSUM
iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4
nf_nat tun ebtable_filter ebtables xt_physdev br_netfilter bridge stp llc
nf_conntrack_ipv4 nf_defrag_ipv4 ip6t_REJECT nf_reject_ipv6 nf_conntrack_ipv6
nf_defrag_ipv6 xt_conntrack ip6table_filter nf_conntrack ip6_tables joydev
snd_usb_audio intel_rapl snd_usbmidi_lib snd_rawmidi x86_pkg_temp_thermal
coretemp kvm_intel kvm snd_hda_codec_hdmi snd_hda_codec_realtek tuner_simple
tuner_types snd_hda_codec_generic tuner ppdev mxm_wmi snd_hda_intel msp3400
vfat fat irqbypass crct10dif_pclmul crc32_pclmul bttv snd_hda_codec
snd_hda_core tea575x tveeprom snd_bt87x videobuf_dma_sg snd_hwdep
ghash_clmulni_intel hci_uart snd_seq btbcm btqca snd_seq_device btintel
videobuf_core bluetooth
jun 30 18:33:31 shalem.localdomain kernel:  rc_core v4l2_common videodev
snd_pcm media snd_timer snd soundcore i2c_i801 shpchp parport_pc
pinctrl_sunrisepoint parport wmi rfkill pinctrl_intel intel_lpss_acpi
intel_lpss acpi_pad acpi_als kfifo_buf industrialio tpm_tis tpm binfmt_misc uas
usb_storage i915 e1000e crc32c_intel i2c_algo_bit drm_kms_helper drm serio_raw
ptp nvme pps_core nvme_core video i2c_hid fjes i2c_dev
jun 30 18:33:31 shalem.localdomain kernel: CPU: 1 PID: 1279 Comm: Xorg Not
tainted 4.6.3-300.fc24.x86_64 #1
jun 30 18:33:31 shalem.localdomain kernel: Hardware name: To Be Filled By
O.E.M. To Be Filled By O.E.M./B150M Pro4S/D3, BIOS P1.70 01/25/2016
jun 30 18:33:31 shalem.localdomain kernel:  0000000000000286 0000000062edda06
ffff880068fe7cb0 ffffffff813dbcff
jun 30 18:33:31 shalem.localdomain kernel:  0000000000000000 0000000000000000
ffff880068fe7cf0 ffffffff810a740b
jun 30 18:33:31 shalem.localdomain kernel:  000000b84c89f028 ffff8807dc038980
ffff88084c89f028 ffff88084c0e6000
jun 30 18:33:31 shalem.localdomain kernel: Call Trace:
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffff813dbcff>]
dump_stack+0x63/0x84
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffff810a740b>]
__warn+0xcb/0xf0
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffff810a753d>]
warn_slowpath_null+0x1d/0x20
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffffc0076c00>]
drm_modeset_lock_crtc+0xf0/0x100 [drm]
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffffc006cafe>]
drm_mode_page_flip_ioctl+0x7e/0x310 [drm]
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffffc005c922>]
drm_ioctl+0x152/0x540 [drm]
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffffc006ca80>] ?
drm_mode_gamma_get_ioctl+0xe0/0xe0 [drm]
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffff813e4b89>] ?
timerqueue_add+0x59/0xb0
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffff8111556d>] ?
enqueue_hrtimer+0x3d/0x90
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffff8125d4a3>]
do_vfs_ioctl+0xa3/0x5d0
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffff8125da49>]
SyS_ioctl+0x79/0x90
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffff817dd3f2>]
entry_SYSCALL_64_fastpath+0x1a/0xa4
jun 30 18:33:31 shalem.localdomain kernel: ---[ end trace dc5cdee6ba5718c5 ]---
jun 30 18:33:31 shalem.localdomain kernel: ------------[ cut here ]------------
jun 30 18:33:31 shalem.localdomain kernel: WARNING: CPU: 2 PID: 1287 at
drivers/gpu/drm/drm_modeset_lock.c:233 drm_modeset_unlock_crtc+0x45/0x50 [drm]
jun 30 18:33:31 shalem.localdomain kernel: Modules linked in: fuse xt_CHECKSUM
iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4
nf_nat tun ebtable_filter ebtables xt_physdev br_netfilter bridge stp llc
nf_conntrack_ipv4 nf_defrag_ipv4 ip6t_REJECT nf_reject_ipv6 nf_conntrack_ipv6
nf_defrag_ipv6 xt_conntrack ip6table_filter nf_conntrack ip6_tables joydev
snd_usb_audio intel_rapl snd_usbmidi_lib snd_rawmidi x86_pkg_temp_thermal
coretemp kvm_intel kvm snd_hda_codec_hdmi snd_hda_codec_realtek tuner_simple
tuner_types snd_hda_codec_generic tuner ppdev mxm_wmi snd_hda_intel msp3400
vfat fat irqbypass crct10dif_pclmul crc32_pclmul bttv snd_hda_codec
snd_hda_core tea575x tveeprom snd_bt87x videobuf_dma_sg snd_hwdep
ghash_clmulni_intel hci_uart snd_seq btbcm btqca snd_seq_device btintel
videobuf_core bluetooth
jun 30 18:33:31 shalem.localdomain kernel:  rc_core v4l2_common videodev
snd_pcm media snd_timer snd soundcore i2c_i801 shpchp parport_pc
pinctrl_sunrisepoint parport wmi rfkill pinctrl_intel intel_lpss_acpi
intel_lpss acpi_pad acpi_als kfifo_buf industrialio tpm_tis tpm binfmt_misc uas
usb_storage i915 e1000e crc32c_intel i2c_algo_bit drm_kms_helper drm serio_raw
ptp nvme pps_core nvme_core video i2c_hid fjes i2c_dev
jun 30 18:33:31 shalem.localdomain kernel: CPU: 2 PID: 1287 Comm: Xorg Tainted:
G        W       4.6.3-300.fc24.x86_64 #1
jun 30 18:33:31 shalem.localdomain kernel: Hardware name: To Be Filled By
O.E.M. To Be Filled By O.E.M./B150M Pro4S/D3, BIOS P1.70 01/25/2016
jun 30 18:33:31 shalem.localdomain kernel:  0000000000000286 000000006b79f9de
ffff8808300e7ca0 ffffffff813dbcff
jun 30 18:33:31 shalem.localdomain kernel:  0000000000000000 0000000000000000
ffff8808300e7ce0 ffffffff810a740b
jun 30 18:33:31 shalem.localdomain kernel:  000000e900000000 0000000000000000
ffff88084c89f068 ffff88084c821400
jun 30 18:33:31 shalem.localdomain kernel: Call Trace:
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffff813dbcff>]
dump_stack+0x63/0x84
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffff810a740b>]
__warn+0xcb/0xf0
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffff810a753d>]
warn_slowpath_null+0x1d/0x20
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffffc0076655>]
drm_modeset_unlock_crtc+0x45/0x50 [drm]
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffffc00680b9>]
drm_mode_cursor_common+0x89/0x180 [drm]
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffffc006b910>]
drm_mode_cursor_ioctl+0x50/0x70 [drm]
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffffc005c922>]
drm_ioctl+0x152/0x540 [drm]
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffff81610f80>] ?
evdev_read+0xd0/0x2d0
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffffc006b8c0>] ?
drm_mode_setcrtc+0x520/0x520 [drm]
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffff8125d4a3>]
do_vfs_ioctl+0xa3/0x5d0
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffff8125da49>]
SyS_ioctl+0x79/0x90
jun 30 18:33:31 shalem.localdomain kernel:  [<ffffffff817dd3f2>]
entry_SYSCALL_64_fastpath+0x1a/0xa4
jun 30 18:33:31 shalem.localdomain kernel: ---[ end trace dc5cdee6ba5718c6 ]---

So it seems that the newer xserver or modesetting driver somehow triggers a
locking issue in the kernel.

Regards,

Hans




*) I've also tried with drm-intel/drm-intel-next but with that:
1) The gdm wayland login session only shows a cursor and an otherwise black
screen
2) Starting at runlevel 3 and then doing startx only lights up the primary
monitor of the 2 1920x1080 monitors I have, and the display on that one
flickers. Where as the secondary monitor gets no signal, even though gnome / X
think it is getting signal (xrandr settings show it is on in the same way as
always).
Note no messages show up in dmesg

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