On Mon, Jan 16, 2012 at 05:18:17PM +0100, CC wrote: > Hi, > > I've heard that you need users having the RC6 bug. > > I have the following setup: > CPU: Intel Core i5-2500K > Mainboard: ASRock Z68 Pro3-M > Memory: Corsair Vengeance CMZ8GX3M2A1866C9 > > Although the CPU doesn't support VT-d, I disabled all virtualization > support in the UEFI setup. > > I use Arch Linux and Gnome 3 in the fallback mode. The problem is more > drastic without fallback mode, however. > > Whenever I enable RC6, I get the a few of these errors in dmesg: > > [ 48.900000] WARNING: at drivers/gpu/drm/i915/i915_drv.c:387 > __gen6_gt_wait_for_fifo+0x94/0xa0 [i915]() > [ 48.900002] Hardware name: To Be Filled By O.E.M. > [ 48.900002] Modules linked in: ipv6 fuse ext2 snd_hda_codec_hdmi > snd_hda_codec_realtek mei(C) joydev r8169 shpchp pci_hotplug usbhid hid > snd_hda_intel iTCO_wdt mii iTCO_vendor_support i2c_i801 snd_hda_codec > processor snd_hwdep snd_pcm snd_timer snd soundcore snd_page_alloc psmouse > serio_raw pcspkr evdev ext4 mbcache jbd2 crc16 xhci_hcd ehci_hcd usbcore > i915 drm_kms_helper drm intel_agp i2c_algo_bit button intel_gtt i2c_core > video sd_mod ahci libahci libata scsi_mod > [ 48.900019] Pid: 623, comm: Xorg Tainted: G WC 3.1.9-2-ARCH #1 > [ 48.900020] Call Trace: > [ 48.900023] [<ffffffff81061bef>] warn_slowpath_common+0x7f/0xc0 > [ 48.900025] [<ffffffff81061c4a>] warn_slowpath_null+0x1a/0x20 > [ 48.900028] [<ffffffffa00e0764>] __gen6_gt_wait_for_fifo+0x94/0xa0 > [i915] > [ 48.900032] [<ffffffffa015d2d5>] ring_write_tail+0x65/0x120 [i915] > [ 48.900036] [<ffffffffa01619bc>] render_ring_flush+0xbc/0xe0 [i915] > [ 48.900040] [<ffffffffa010b803>] i915_gem_flush_ring+0x43/0x250 [i915] > [ 48.900044] [<ffffffffa0112b50>] > i915_gem_do_execbuffer.isra.7+0x1020/0x16d0 [i915] > [ 48.900048] [<ffffffffa01136bb>] i915_gem_execbuffer2+0x8b/0x240 [i915] > [ 48.900051] [<ffffffffa0098434>] drm_ioctl+0x3e4/0x4c0 [drm] > [ 48.900053] [<ffffffff810746cb>] ? recalc_sigpending+0x1b/0x50 > [ 48.900057] [<ffffffffa0113630>] ? i915_gem_execbuffer+0x430/0x430 > [i915] > [ 48.900059] [<ffffffff8101e9b1>] ? fpu_finit+0x21/0x40 > [ 48.900061] [<ffffffff8116fddf>] do_vfs_ioctl+0x8f/0x500 > [ 48.900063] [<ffffffff81014beb>] ? sys_rt_sigreturn+0x1eb/0x200 > [ 48.900064] [<ffffffff811702e1>] sys_ioctl+0x91/0xa0 > [ 48.900066] [<ffffffff8140c3c2>] system_call_fastpath+0x16/0x1b > [ 48.900067] ---[ end trace 9a23b8b32b16a424 ]--- This is a known side-effect of a dying gpu. It essentially means that the gpu refuses to wake up from deep-sleep states. > and then > > [ 53.163526] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer > elapsed... GPU hung > [ 53.165046] [drm] capturing error event; look for more information in > /debug/dri/0/i915_error_state > [ 53.177356] [drm:i915_wait_request] *ERROR* i915_wait_request returns > -11 (awaiting 1593 at 1592, next 1594) > [ 53.181979] [drm:init_ring_common] *ERROR* render ring initialization > failed ctl 00000000 head 00000000 tail 00000000 start 00000000 > [ 53.185522] [drm:init_ring_common] *ERROR* gen6 bsd ring initialization > failed ctl 00000000 head 00000000 tail 00000000 start 00000000 > [ 53.188558] [drm:init_ring_common] *ERROR* blt ring initialization > failed ctl 00000000 head 00000000 tail 00000000 start 00000000 > [ 55.330146] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer > elapsed... GPU hung > [ 55.332202] [drm:i915_wait_request] *ERROR* i915_wait_request returns > -11 (awaiting 1594 at 1591, next 1595) > [ 55.333258] [drm:i915_reset] *ERROR* GPU hanging too fast, declaring > wedged! > [ 55.333260] [drm:i915_reset] *ERROR* Failed to reset chip. > > Of course, I'd be willing to test out stuff. I'd need a bit of guide, > however. Can you please attach i915_error_state from debugfs (you need to retrigger the issue)? It contains a gpu dump which is useful to diagnose the bug. Yours, Daniel -- Daniel Vetter Mail: daniel at ffwll.ch Mobile: +41 (0)79 365 57 48
