[Bug 83677] [HSW gt1] GPU HANG: ecode 0:0x87d3bffa on ctx load

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83677

--- Comment #151 from dhead666 <myfoolishgames at gmail.com> ---
I'm not sure if this is another issue or related to this one but even with the
two patches from Peter's repo I'm still experiencing slowdowns and excessive
use of RAM with Chromium.
Running Chromium with few tabs opened and another application that uses the GPU
(like Kodi) will quicken the appearance of slowdown.
One might point the slowdowns source as Chromium's excessive use of RAM but
I've got 4GB of it.

I'm experiencing this for a while but until now the "stuck on render ring"
forced me to use i915 kernel parameters or the huge backport from Chris
Wilson's development branch so I couldn't be sure this issue will be still
exist after resolving the "stuck on render ring".

This is usually the output in journald:

systemd-coredump[19029]: Process 14662 (chromium) of user 1000 dumped core.
chromium.desktop[14628]:
[19045:19046:1216/181255:ERROR:gpu_watchdog_thread.cc(253)] The GPU process
hung. Terminating after 10000 ms.
kernel: Watchdog[19046]: segfault at 0 ip 00007f7cfe3e619b sp 00007f7ce78f75a0
error 6 in chromium[7f7cfa128000+6499000]
chromium.desktop[14628]:
[14628:14628:1216/181255:ERROR:gpu_process_transport_factory.cc(437)] Failed to
establish GPU channel.
systemd-coredump[19047]: Process 19045 (chromium) of user 1000 dumped core.
chromium.desktop[14628]:
[14628:14628:1216/181255:ERROR:gpu_process_transport_factory.cc(461)] Lost UI
shared context.
gnome-session[8166]: Window manager warning: last_focus_time (252848839) is
greater than comparison timestamp (252820277).  This most likely represents a
buggy client sending inaccurate timestamps in messages such as
_NET_ACTIVE_WINDOW.  Trying to work around...
kernel: ------------[ cut here ]------------
kernel: WARNING: CPU: 1 PID: 18930 at drivers/gpu/drm/i915/intel_pm.c:6585
intel_display_power_put+0x15c/0x170 [i915]()
kernel: Modules linked in: fuse ctr ccm ecb ath3k btusb bluetooth
hid_logitech_dj usbhid hid nvram tpm_infineon snd_hda_codec_hdmi arc4 joydev
ath9k mousedev cyapa ath9k_common ath9k_hw coretemp hwmon iTCO_wdt
iTCO_vendor_support intel_rapl ath x86_pkg_temp_thermal intel_powerclamp
mac80211 kvm_intel kvm crct10dif_pclmul crc32_pclmul evdev crc32c_intel mac_hid
snd_hda_codec_realtek chromeos_laptop snd_hda_codec_generic cfg80211
ghash_clmulni_intel cryptd pcspkr serio_raw i915 rfkill i2c_i801 snd_hda_intel
shpchp lpc_ich snd_hda_controller fan ac tpm_tis battery snd_hda_codec tpm
snd_hwdep drm_kms_helper i2c_designware_pci snd_pcm thermal dw_dmac_pci drm
video snd_timer dw_dmac dw_dmac_core gpio_lynxpoint 8250_dw snd soundcore
intel_gtt i2c_designware_platform i2c_algo_bit processor i2c_designware_core
kernel:  spi_pxa2xx_platform button uvcvideo videobuf2_vmalloc videobuf2_memops
videobuf2_core v4l2_common videodev media i2c_core sch_fq_codel ext4 crc16
mbcache jbd2 sd_mod atkbd libps2 i8042 serio sdhci_acpi sdhci led_class
mmc_core ahci libahci libata scsi_mod xhci_pci xhci_hcd usbcore usb_common
kernel: CPU: 1 PID: 18930 Comm: kworker/1:0 Tainted: G        W     
3.18.0-1-mainline #3
kernel: Hardware name: Acer Peppy, BIOS          10/18/2013
kernel: Workqueue: events edp_panel_vdd_work [i915]
kernel:  0000000000000000 0000000012e4cb13 ffff88003790fd28 ffffffff8154ecb4
kernel:  0000000000000000 0000000000000000 ffff88003790fd68 ffffffff81072bc1
kernel:  ffff88003790fd48 ffff88007b22002c 000000000000000b ffff88007b228810
kernel: Call Trace:
kernel:  [<ffffffff8154ecb4>] dump_stack+0x4e/0x71
kernel:  [<ffffffff81072bc1>] warn_slowpath_common+0x81/0xa0
kernel:  [<ffffffff81072cda>] warn_slowpath_null+0x1a/0x20
kernel:  [<ffffffffa03d3a3c>] intel_display_power_put+0x15c/0x170 [i915]
kernel:  [<ffffffffa044446d>] pps_unlock+0x3d/0x50 [i915]
kernel:  [<ffffffffa04480c9>] edp_panel_vdd_work+0x39/0x40 [i915]
kernel:  [<ffffffff8108b7c5>] process_one_work+0x145/0x400
kernel:  [<ffffffff8108bd8b>] worker_thread+0x6b/0x4a0
kernel:  [<ffffffff8108bd20>] ? init_pwq.part.22+0x10/0x10
kernel:  [<ffffffff81090dfa>] kthread+0xea/0x100
kernel:  [<ffffffff81090d10>] ? kthread_create_on_node+0x1c0/0x1c0
kernel:  [<ffffffff8155477c>] ret_from_fork+0x7c/0xb0
kernel:  [<ffffffff81090d10>] ? kthread_create_on_node+0x1c0/0x1c0
kernel: ---[ end trace a3c190b67c9fbfe4 ]---


Sometimes I also get this one:

kernel: [drm:ivybridge_set_fifo_underrun_reporting] *ERROR* uncleared fifo
underrun on pipe A

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