[Kernel-packages] [Bug 1564759] Re: [i915_bpo] Fix RC6 on SKL GT3 & GT4

[melenzb]

Whereas this seems fixed in current 4.4 kernels as supplied by 16.04, it
has returned in 4.8 kernels supplied with Yakkety Yak 16.10.

It is hardly possible to keep a system running for more than half an
hour in yakkety, without sudden reboot. Especially video playback
triggers the problem

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Title:
  [i915_bpo] Fix RC6 on SKL GT3 & GT4

Status in DRI:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so fix it by adding two patches to extend certain
  workarounds to cover all chip revisions.

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[Kernel-packages] [Bug 1564759] Re: [i915_bpo] Fix RC6 on SKL GT3 & GT4

[Bug Watch Updater]

** Changed in: dri
   Status: Incomplete => Fix Released

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Title:
  [i915_bpo] Fix RC6 on SKL GT3 & GT4

Status in DRI:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so fix it by adding two patches to extend certain
  workarounds to cover all chip revisions.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1564759]

[C-jess]

Nevermind, I compiled a binary and my whole computer froze

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Title:
  [i915_bpo] Fix RC6 on SKL GT3 & GT4

Status in DRI:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so fix it by adding two patches to extend certain
  workarounds to cover all chip revisions.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1564759]

[C-jess]

I just used the patch on 4.6-rc4 from upstream source and it works for
me!

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Title:
  [i915_bpo] Fix RC6 on SKL GT3 & GT4

Status in DRI:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so fix it by adding two patches to extend certain
  workarounds to cover all chip revisions.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1564759]

[Kimmo Nikkanen]

This fixed by,

commit d528a6a0f3fd346bd7cc2de611a4149b6ebaab41
Author: Mika Kuoppala 
Date:   Tue Apr 5 15:56:16 2016 +0300

drm/i915/skl: Fix rc6 based gpu/system hang

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Title:
  [i915_bpo] Fix RC6 on SKL GT3 & GT4

Status in DRI:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so fix it by adding two patches to extend certain
  workarounds to cover all chip revisions.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1564759]

[Myemailu]

I can confirm that the patch in comment 28 (Use WaRsDisableCoarsePowerGating)
solved the issue on my Intel NUC6i5 with only a moderate increase in power 
consumption.

With an idle desktop using kernel 4.6.0-rc3, the system consumes:

7 Watts without patch, RC6 enabled, frequent crashes
17 Watts with i915.enable_rc6=0, no crashes
9 Watts with patch, no crashes

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Title:
  [i915_bpo] Fix RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so fix it by adding two patches to extend certain
  workarounds to cover all chip revisions.

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[Kernel-packages] [Bug 1564759]

[gerard]

Compiled kernel 4.6 rc2 drm-intel-nightly with the Mika patch (comment #28) and 
everything is working fine, no gpu hang at the moment (4 days testing).
Why this patch is not merged? Maybe because needs more testing?

Thanks Mika.

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Title:
  [i915_bpo] Fix RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so fix it by adding two patches to extend certain
  workarounds to cover all chip revisions.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1564759]

[Oddrunesl]

Created attachment 122856
attachment-11432-0.html

As far as I understand, the patch disables power gating which is a very bad
thing in terms of power usage so this is not a fix, just a temp workaround.
On 10 Apr 2016 14:32,  wrote:

> *Comment # 35  on
> bug 94161  from Gerard
> Farré  *
>
> Compiled kernel 4.6 rc2 drm-intel-nightly with the Mika patch (comment #28 
> ) and
> everything is working fine, no gpu hang at the moment (4 days testing).
> Why this patch is not merged? Maybe because needs more testing?
>
> Thanks Mika.
>
> --
> You are receiving this mail because:
>
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>
>

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Title:
  [i915_bpo] Fix RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so fix it by adding two patches to extend certain
  workarounds to cover all chip revisions.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1564759]

[jason bishop]

(In reply to miticotoby from comment #32)
> Tested as Timo using #28 plus #5 from 93491. seems to fix the issue for me
> too. has been stable for a few hours now without disabling rc6

seconding miticotoby.  applied #28 plus #5 from 93491 working fine for
few days now.  (without disabling rc6)

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Title:
  [i915_bpo] Fix RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so fix it by adding two patches to extend certain
  workarounds to cover all chip revisions.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1564759] Re: [i915_bpo] Fix RC6 on SKL GT3 & GT4

[Launchpad Bug Tracker]

This bug was fixed in the package linux - 4.4.0-18.34

---
linux (4.4.0-18.34) xenial; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
- LP: #1566868

  * [i915_bpo] Fix RC6 on SKL GT3 & GT4 (LP: #1564759)
- SAUCE: i915_bpo: drm/i915/skl: Fix rc6 based gpu/system hang
- SAUCE: i915_bpo: drm/i915/skl: Fix spurious gpu hang with gt3/gt4 revs

  * CONFIG_ARCH_ROCKCHIP not enabled in armhf generic kernel (LP: #1566283)
- [Config] CONFIG_ARCH_ROCKCHIP=y

  * [Feature] Memory Bandwidth Monitoring (LP: #1397880)
- perf/x86/cqm: Fix CQM handling of grouping events into a cache_group
- perf/x86/cqm: Fix CQM memory leak and notifier leak
- x86/cpufeature: Carve out X86_FEATURE_*
- Merge branch 'timers-core-for-linus' of 
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
- x86/topology: Create logical package id
- perf/x86/mbm: Add Intel Memory B/W Monitoring enumeration and init
- perf/x86/mbm: Add memory bandwidth monitoring event management
- perf/x86/mbm: Implement RMID recycling
- perf/x86/mbm: Add support for MBM counter overflow handling

  * User namespace mount updates (LP: #1566505)
- SAUCE: quota: Require that qids passed to dqget() be valid and map into 
s_user_ns
- SAUCE: fs: Allow superblock owner to change ownership of inodes with 
unmappable ids
- SAUCE: fuse: Don't initialize user_id or group_id in mount options
- SAUCE: cgroup: Use a new super block when mounting in a cgroup namespace
- SAUCE: fs: fix a posible leak of allocated superblock

  * [arm64] kernel BUG at /build/linux-StrpB2/linux-4.4.0/fs/ext4/inode.c:2394!
(LP: #1566518)
- arm64: Honour !PTE_WRITE in set_pte_at() for kernel mappings
- arm64: Update PTE_RDONLY in set_pte_at() for PROT_NONE permission

  * [Feature]USB core and xHCI tasks for USB 3.1 SuperSpeedPlus (SSP) support
for Alpine Ridge on SKL (LP: #1519623)
- usb: define USB_SPEED_SUPER_PLUS speed for SuperSpeedPlus USB3.1 devices
- usb: set USB 3.1 roothub device speed to USB_SPEED_SUPER_PLUS
- usb: show speed "1" in sysfs for USB 3.1 SuperSpeedPlus devices
- usb: add device descriptor for usb 3.1 root hub
- usb: Support USB 3.1 extended port status request
- xhci: Make sure xhci handles USB_SPEED_SUPER_PLUS devices.
- xhci: set roothub speed to USB_SPEED_SUPER_PLUS for USB3.1 capable 
controllers
- xhci: USB 3.1 add default Speed Attributes to SuperSpeedPlus device 
capability
- xhci: set slot context speed field to SuperSpeedPlus for USB 3.1 SSP 
devices
- usb: Add USB3.1 SuperSpeedPlus Isoc Endpoint Companion descriptor
- usb: Parse the new USB 3.1 SuperSpeedPlus Isoc endpoint companion 
descriptor
- usb: Add USB 3.1 Precision time measurement capability descriptor support
- xhci: refactor and cleanup endpoint initialization.
- xhci: Add SuperSpeedPlus high bandwidth isoc support to xhci endpoints
- xhci: cleanup isoc tranfers queuing code
- xhci: Support extended burst isoc TRB structure used by xhci 1.1 for USB 
3.1
- SAUCE: (noup) usb: fix regression in SuperSpeed endpoint descriptor 
parsing

  * wrong/missing permissions for device file /dev/prandom (prng.ko)
(LP: #1558275)
- s390/crypto: provide correct file mode at device register.

  * The Front MIC jack can't work on a HP desktop machine (LP: #1564712)
- ALSA: hda - fix front mic problem for a HP desktop

  * HP Notebook Probook 440 G3  HDA Intel PCH horrible sounds while booting
(LP: #1556228)
- ALSA: hda - Apply reboot D3 fix for CX20724 codec, too

  * please provide mmc-modules udeb (LP: #1565765)
- [Config] Add mmc block drivers to d-i

  * linux: Enforce signed module loading when UEFI secure boot (LP: #1566221)
- Add secure_modules() call
- PCI: Lock down BAR access when module security is enabled
- x86: Lock down IO port access when module security is enabled
- ACPI: Limit access to custom_method
- asus-wmi: Restrict debugfs interface when module loading is restricted
- Restrict /dev/mem and /dev/kmem when module loading is restricted
- acpi: Ignore acpi_rsdp kernel parameter when module loading is restricted
- kexec: Disable at runtime if the kernel enforces module loading 
restrictions
- x86: Restrict MSR access when module loading is restricted
- [Config] CONFIG_EFI_SECURE_BOOT_SIG_ENFORCE=n
- Add option to automatically enforce module signatures when in Secure Boot 
mode
- efi: Make EFI_SECURE_BOOT_SIG_ENFORCE depend on EFI
- efi: Add EFI_SECURE_BOOT bit
- hibernate: Disable in a signed modules environment

  * [Hyper-V] Additional PCI passthrough commits (LP: #1565967)
- PCI: Add fwnode_handle to x86 pci_sysdata
- PCI: Look up IRQ domain by fwnode_handle
- [Config] CONFIG_PCI_HYPERV=m
- PCI: hv: Add paravirtual PCI front-end for Microsoft Hyper-V VMs

  * [Bug]Lenovo Yoga 260 and Carbon X1 4th gen freeze on HWP enable
(LP: 

[Kernel-packages] [Bug 1564759]

[kang]

Note that I notice sluggishness (my 3y old intel 2D graphics - and CPU
rendered graphics on this computer are faster) and display freezes with
the fix and DRM enalbed, though this might need a separate bug (not sure
if its related or just another bug)

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Title:
  [i915_bpo] Fix RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Xenial:
  Fix Committed

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so fix it by adding two patches to extend certain
  workarounds to cover all chip revisions.

To manage notifications about this bug go to:
https://bugs.launchpad.net/dri/+bug/1564759/+subscriptions

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[Kernel-packages] [Bug 1564759] Re: [i915_bpo] Fix RC6 on SKL GT3 & GT4

[Tim Gardner]

** Changed in: linux (Ubuntu Xenial)
   Status: Triaged => Fix Committed

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Title:
  [i915_bpo] Fix RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Xenial:
  Fix Committed

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so fix it by adding two patches to extend certain
  workarounds to cover all chip revisions.

To manage notifications about this bug go to:
https://bugs.launchpad.net/dri/+bug/1564759/+subscriptions

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[Kernel-packages] [Bug 1564759] Re: [i915_bpo] Fix RC6 on SKL GT3 & GT4

[Timo Aaltonen]

** Summary changed:

- [i915_bpo] Disable RC6 on SKL GT3 & GT4
+ [i915_bpo] Fix RC6 on SKL GT3 & GT4

** Description changed:

  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
- "Iris Pro"), so disable it until the bug(s) are fixed.
+ "Iris Pro"), so fix it by adding two patches to extend certain
+ workarounds to cover all chip revisions.

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Title:
  [i915_bpo] Fix RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Triaged

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so fix it by adding two patches to extend certain
  workarounds to cover all chip revisions.

To manage notifications about this bug go to:
https://bugs.launchpad.net/dri/+bug/1564759/+subscriptions

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[Kernel-packages] [Bug 1564759] Re: [i915_bpo] Disable RC6 on SKL GT3 & GT4

[Bug Watch Updater]

** Changed in: dri
   Status: Confirmed => Incomplete

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You received this bug notification because you are a member of Kernel
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Title:
  [i915_bpo] Disable RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Triaged

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so disable it until the bug(s) are fixed.

To manage notifications about this bug go to:
https://bugs.launchpad.net/dri/+bug/1564759/+subscriptions

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[Kernel-packages] [Bug 1564759]

[Timo Aaltonen]

I heard this might be due to old bios, which my system certainly has..
so verify you have the latest from the vendor (mine is from intel, and
no updates available for test hw, so..)

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Title:
  [i915_bpo] Disable RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Triaged

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so disable it until the bug(s) are fixed.

To manage notifications about this bug go to:
https://bugs.launchpad.net/dri/+bug/1564759/+subscriptions

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[Kernel-packages] [Bug 1564759]

[Oddrunesl]

Negative on #24.

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Title:
  [i915_bpo] Disable RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Triaged

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so disable it until the bug(s) are fixed.

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[Kernel-packages] [Bug 1564759]

[Timo Aaltonen]

#28 plus #5 from 93491 seem to have fixed glmark2 here, could be that
#28 alone would be enough but doesn't hurt to test with both..

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Title:
  [i915_bpo] Disable RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Triaged

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so disable it until the bug(s) are fixed.

To manage notifications about this bug go to:
https://bugs.launchpad.net/dri/+bug/1564759/+subscriptions

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[Kernel-packages] [Bug 1564759]

[Timo Aaltonen]

#24 didn't fix it for me

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Title:
  [i915_bpo] Disable RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Triaged

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so disable it until the bug(s) are fixed.

To manage notifications about this bug go to:
https://bugs.launchpad.net/dri/+bug/1564759/+subscriptions

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[Kernel-packages] [Bug 1564759]

[kang]

I'm running patch from comment 28 over the mainline kernel (4.6rc1)
No freeze/crash so far even when i stress test it.

Thanks Mika!

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Title:
  [i915_bpo] Disable RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Triaged

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so disable it until the bug(s) are fixed.

To manage notifications about this bug go to:
https://bugs.launchpad.net/dri/+bug/1564759/+subscriptions

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[Kernel-packages] [Bug 1564759]

[miiiiitico]

Tested as Timo using #28 plus #5 from 93491. seems to fix the issue for
me too. has been stable for a few hours now without disabling rc6

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Title:
  [i915_bpo] Disable RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Triaged

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so disable it until the bug(s) are fixed.

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[Kernel-packages] [Bug 1564759]

[Mika-kuoppala]

Created attachment 122661
drm/i915/skl: Use WaForceContextSaveRestoreNonCoherent for all revs

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Title:
  [i915_bpo] Disable RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Triaged

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so disable it until the bug(s) are fixed.

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https://bugs.launchpad.net/dri/+bug/1564759/+subscriptions

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[Kernel-packages] [Bug 1564759]

[Mika-kuoppala]

Created attachment 122664
drm/i915/skl: Use WaRsDisableCoarsePowerGating for all revs

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Title:
  [i915_bpo] Disable RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Triaged

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so disable it until the bug(s) are fixed.

To manage notifications about this bug go to:
https://bugs.launchpad.net/dri/+bug/1564759/+subscriptions

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[Kernel-packages] [Bug 1564759]

[Mikesart]

(In reply to Timo Aaltonen from comment #27)
> I heard this might be due to old bios, which my system certainly has.. so
> verify you have the latest from the vendor

I've got a Skylake Dell XPS 13 9350 with the very latest bios from a
couple days ago (1.3.3), and the bug still happens on this machine if I
remove rc6=0 from my boot line.

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Title:
  [i915_bpo] Disable RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Triaged

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so disable it until the bug(s) are fixed.

To manage notifications about this bug go to:
https://bugs.launchpad.net/dri/+bug/1564759/+subscriptions

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[Kernel-packages] [Bug 1564759]

[Di-michael]

I can confirm this issue on a Intel NUC6i5SYH, Iris Graphics 540 with kernel 
4.4.6-300.fc23.x86_64 (exact same symptoms, logs ...). I bet a whole lot of 
people must be affected ...
Is this driver supported by Intel themselves or the community?

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Title:
  [i915_bpo] Disable RC6 on SKL GT3 & GT4

Status in DRI:
  Incomplete
Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Triaged

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so disable it until the bug(s) are fixed.

To manage notifications about this bug go to:
https://bugs.launchpad.net/dri/+bug/1564759/+subscriptions

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[Kernel-packages] [Bug 1564759] Re: [i915_bpo] Disable RC6 on SKL GT3 & GT4

[Bug Watch Updater]

Launchpad has imported 23 comments from the remote bug at
https://bugs.freedesktop.org/show_bug.cgi?id=94161.

If you reply to an imported comment from within Launchpad, your comment
will be sent to the remote bug automatically. Read more about
Launchpad's inter-bugtracker facilities at
https://help.launchpad.net/InterBugTracking.


On 2016-02-15T16:34:18+00:00 Mikael-w wrote:

Created attachment 121772
GPU crash dump

I have experienced GPU hangs with all kernels after 4.3.

I'm running a MS Surface Pro 4.

Feb 15 17:27:22 hat kernel: [  478.912402] [drm] stuck on render ring
Feb 15 17:27:22 hat kernel: [  478.913345] [drm] GPU HANG: ecode 
9:0:0x85df9fff, in gnome-shell [1956], reason: Ring hung, action: reset
Feb 15 17:27:22 hat kernel: [  478.913357] [drm] GPU hangs can indicate a bug 
anywhere in the entire gfx stack, including userspace.
Feb 15 17:27:22 hat kernel: [  478.913361] [drm] Please file a _new_ bug report 
on bugs.freedesktop.org against DRI -> DRM/Intel
Feb 15 17:27:22 hat kernel: [  478.913364] [drm] drm/i915 developers can then 
reassign to the right component if it's not a kernel issue.
Feb 15 17:27:22 hat kernel: [  478.913367] [drm] The gpu crash dump is required 
to analyze gpu hangs, so please always attach it.
Feb 15 17:27:22 hat kernel: [  478.913371] [drm] GPU crash dump saved to 
/sys/class/drm/card0/error
Feb 15 17:27:22 hat kernel: [  478.915833] drm/i915: Resetting chip after gpu 
hang
Feb 15 17:27:24 hat kernel: [  480.901312] [drm] RC6 on

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1564759/comments/0


On 2016-02-16T11:10:18+00:00 Christophe Prigent wrote:

Hi Mikael,
Which GPU is it: m3 Intel HD graphics 515 / i5 Intel HD graphics 520 / i7 Intel 
Iris graphics?
Which steps are causing the GPU hang?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1564759/comments/1


On 2016-02-16T11:56:42+00:00 Mikael-w wrote:

It's Intel Iris (HD 540).

It's hard to say what exactly is causing it. Once it was caused by a
"tail -f /var/log/syslog" scrolling text in Gnome Terminal. Another time
it was caused by a web page being displayed in Firefox. A third time it
was caused by switching workspace in Gnome Shell.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1564759/comments/2


On 2016-02-16T12:01:27+00:00 Mikael-w wrote:

I should add that these hangs happen every other minute when things
change on the screen.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1564759/comments/3


On 2016-02-20T18:09:12+00:00 Ivan Giuliani wrote:

I seem to be affected by this as well (same GPU, on an XPS 13" (2016)).
Tried any kernel from 4.3 to 4.5 on Ubuntu, including the drm-intel-next
kernel (4.5.0-997-generic).

A workaround is to add i915.enable_rc6=0 to the kernel boot parameters.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1564759/comments/4


On 2016-02-24T21:43:24+00:00 Mikael-w wrote:

I have now tried this with the latest drm-intel kernel and the newest
skl-dcm firmware (1.26).  My libdrm is 2.4.67.

The problem still persists.

A deterministic way to provoke the hang is to run glmark2
(github.com/glmark2).

I can confirm that if I give i915.enable_rc6=0 as a kernel option, the
problem disappears.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1564759/comments/5


On 2016-03-01T20:42:51+00:00 Chris Wilson wrote:

*** Bug 94029 has been marked as a duplicate of this bug. ***

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1564759/comments/6


On 2016-03-02T21:04:46+00:00 Chris Wilson wrote:

To attempt to distinguish another source of bugs, does
intel_pstate=disable make any difference?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1564759/comments/7


On 2016-03-02T21:43:13+00:00 Mikael-w wrote:

(In reply to Chris Wilson from comment #7)
> To attempt to distinguish another source of bugs, does intel_pstate=disable
> make any difference?

Replacing i915.enable_rc6=0 with intel_pstate=disable reintroduces the
GPU crashes.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1564759/comments/8


On 2016-03-10T12:50:29+00:00 Chris Wilson wrote:

*** Bug 94462 has been marked as a duplicate of this bug. ***

Reply at:

[Kernel-packages] [Bug 1564759] [NEW] [i915_bpo] Disable RC6 on SKL GT3 & GT4

[Timo Aaltonen]

Public bug reported:

Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
"Iris Pro"), so disable it until the bug(s) are fixed.

** Affects: dri
 Importance: Unknown
 Status: Unknown

** Affects: linux (Ubuntu)
 Importance: High
 Assignee: Timo Aaltonen (tjaalton)
 Status: Triaged

** Affects: linux (Ubuntu Xenial)
 Importance: High
 Assignee: Timo Aaltonen (tjaalton)
 Status: Triaged

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
   Status: New

** Changed in: linux (Ubuntu Xenial)
   Importance: Undecided => High

** Changed in: linux (Ubuntu Xenial)
   Status: New => Triaged

** Changed in: linux (Ubuntu Xenial)
 Assignee: (unassigned) => Timo Aaltonen (tjaalton)

** Bug watch added: freedesktop.org Bugzilla #94161
   https://bugs.freedesktop.org/show_bug.cgi?id=94161

** Also affects: dri via
   https://bugs.freedesktop.org/show_bug.cgi?id=94161
   Importance: Unknown
   Status: Unknown

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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1564759

Title:
  [i915_bpo] Disable RC6 on SKL GT3 & GT4

Status in DRI:
  Unknown
Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Triaged

Bug description:
  Runtime power management causes GPU hangs on SKL GT3 & GT4 ("Iris" &
  "Iris Pro"), so disable it until the bug(s) are fixed.

To manage notifications about this bug go to:
https://bugs.launchpad.net/dri/+bug/1564759/+subscriptions

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