Re: Question about how to troubleshoot sandybridge kernel opps and subsequest GPU lockup

From: "Nicolas Kalkhof" <nkalkhof@web.de>
To: jleu@mindspring.com, intel-gfx@lists.freedesktop.org
Subject: Re: Question about how to troubleshoot sandybridge kernel opps and subsequest GPU lockup
Date: Fri, 28 Oct 2011 16:12:28 +0200 (CEST)	[thread overview]
Message-ID: <108073885.2419836.1319811148360.JavaMail.fmail@mwmweb019> (raw)

Hi,

looks like a known issue with mobile snb chips when rc6 is enabled. Please try to disable rc6 with  i915.i915_enable_rc6=0 in your kernel cmd line.
This should take care of the wakeup hangs but also causes the gpu to disregard power saving, draining approx 10 watts more from the system.
If disabling rc6 makes your system more stable, try the latest kernel drm next branch from Dave Airlie's git:
git://people.freedesktop.org/~airlied/linux.git  branch:drm-core-next
and use the following kernel cmd parameters:
intel_iommu=off pcie_aspm=force i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1
No Idea if all of these params are effective but this works for me on my lenovo t420 with a i7 2620M.

Regards,
Nic

-----Ursprüngliche Nachricht-----
Von: "James R. Leu" <jleu@mindspring.com>
Gesendet: Oct 24, 2011 6:12:21 AM
An: intel-gfx@lists.freedesktop.org
Betreff: Re: [Intel-gfx] Question about how to troubleshoot sandybridge kernel opps and subsequest GPU lockup

>Hello,
>
>I'm running wow in wine on 64 bit fedora rawhide on a dell vostro 3550
>(i5 with integrated GPU).
>
>I'm reliably able to produce 2 types of crashes:
>- wow freezes, but I can get to text console, in this case I'm able to
> grab a kernel stack trace (below) prior to seeing the normal
> [drm:i915_wait_request] *ERROR* i915_wait_request returns -11 (awaiting 452684 at 452608, next 452686)
>- the other is a complete freeze of the system, hard reset required, nothing logged to /var/log/messages
>
>Is there any value in me creating a bug report for this, it seems to be a pretty common issue.
>Is there any use in my trying different kernel command line optios for the i915 driver
>or config options to the xorg intel driver?
>
>I have the various git trees pulled out (I was looking for recent changes that might be related
>to this issue). I'm capable of building and installing from these git trees if there are specific
>bits that I should test.
>
>Oct 22 20:52:59 localhost kernel: [ 939.830806] ------------[ cut here ]------------
>Oct 22 20:52:59 localhost kernel: [ 939.830814] WARNING: at drivers/gpu/drm/i915/i915_drv.c:372 gen6_gt_force_wake_put+0x29/0x51 [i915]()
>Oct 22 20:52:59 localhost kernel: [ 939.830816] Hardware name: Vostro 3550
>Oct 22 20:52:59 localhost kernel: [ 939.830818] Modules linked in: snd_seq_dummy fuse ip6table_filter ip6_tables ebtable_nat ebtables xt_state xt_CHECKSUM iptable_mangle ppdev parport_pc lp parport vboxpci vboxnetadp vboxnetflt vboxdrv bridge stp llc tun rfcomm bnep ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 snd_hda_codec_hdmi snd_hda_codec_idt uvcvideo videodev btusb media bluetooth v4l2_compat_ioctl32 arc4 snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm iwlagn microcode mac80211 dell_laptop iTCO_wdt r8169 i2c_i801 snd_timer cfg80211 snd mii iTCO_vendor_support dcdbas dell_wmi sparse_keymap soundcore rfkill snd_page_alloc virtio_net kvm_intel kvm binfmt_misc wmi i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan]
>Oct 22 20:52:59 localhost kernel: [ 939.830926] Pid: 0, comm: swapper Tainted: G WC 3.1.0-0.rc10.git0.1.fc17.x86_64 #1
>Oct 22 20:52:59 localhost kernel: [ 939.830928] Call Trace:
>Oct 22 20:52:59 localhost kernel: [ 939.830930] <IRQ [<ffffffff8105c3a0>] warn_slowpath_common+0x83/0x9b
>Oct 22 20:52:59 localhost kernel: [ 939.830941] [<ffffffff8105c3d2>] warn_slowpath_null+0x1a/0x1c
>Oct 22 20:52:59 localhost kernel: [ 939.830952] [<ffffffffa006b624>] gen6_gt_force_wake_put+0x29/0x51 [i915]
>Oct 22 20:52:59 localhost kernel: [ 939.830963] [<ffffffffa006f45f>] i915_read32+0x44/0x6b [i915]
>Oct 22 20:52:59 localhost kernel: [ 939.830975] [<ffffffffa00724a9>] i915_hangcheck_elapsed+0xe8/0x1f8 [i915]
>Oct 22 20:52:59 localhost kernel: [ 939.831027] [<ffffffff81062ddd>] irq_exit+0x5d/0xcf
>Oct 22 20:52:59 localhost kernel: [ 939.831032] [<ffffffff8150de91>] smp_apic_timer_interrupt+0x7c/0x8a
>Oct 22 20:52:59 localhost kernel: [ 939.831036] [<ffffffff8150bd73>] apic_timer_interrupt+0x73/0x80
>Oct 22 20:52:59 localhost kernel: [ 939.831038] <EOI [<ffffffff81014ded>] ? paravirt_read_tsc+0x9/0xd
>Oct 22 20:52:59 localhost kernel: [ 939.831046] [<ffffffff81297075>] ? intel_idle+0xe5/0x10c
>Oct 22 20:52:59 localhost kernel: [ 939.831050] [<ffffffff81297071>] ? intel_idle+0xe1/0x10c
>Oct 22 20:52:59 localhost kernel: [ 939.831054] [<ffffffff813e14fe>] cpuidle_idle_call+0x11c/0x1fe
>Oct 22 20:52:59 localhost kernel: [ 939.831059] [<ffffffff8100e2ef>] cpu_idle+0xab/0x101
>Oct 22 20:52:59 localhost kernel: [ 939.831063] [<ffffffff814df673>] rest_init+0xd7/0xde
>Oct 22 20:52:59 localhost kernel: [ 939.831067] [<ffffffff814df59c>] ? csum_partial_copy_generic+0x16c/0x16c
>Oct 22 20:52:59 localhost kernel: [ 939.831072] [<ffffffff81d53bb0>] start_kernel+0x3dd/0x3ea
>Oct 22 20:52:59 localhost kernel: [ 939.831076] [<ffffffff81d532c4>] x86_64_start_reservations+0xaf/0xb3
>Oct 22 20:52:59 localhost kernel: [ 939.831081] [<ffffffff81d53140>] ? early_idt_handlers+0x140/0x140
>Oct 22 20:52:59 localhost kernel: [ 939.831085] [<ffffffff81d533ca>] x86_64_start_kernel+0x102/0x111
>Oct 22 20:52:59 localhost kernel: [ 939.831088] ---[ end trace f5cba358bac6b7e5 ]---
>
>--
>James R. Leu
>jleu@mindspring.com

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