Using kernel-default-4.4.0-8.1.g9f68b90.x86_64 from OBS Kernel:stable.
GIT Revision: 9f68b909e79a8520cee723b728fec80e33eaef6b
I have started seeing the kernel messages,
[351387.161541] Corrupted low memory at ffff880000008000 (8000 phys) = 0006848e
[359187.721138] Corrupted low memory at ffff880000008000 (8000 phys) = 00087291
[373408.744215] Corrupted low memory at ffff880000008000 (8000 phys) = 000c2033
[376528.967669] Corrupted low memory at ffff880000008000 (8000 phys) = 000d261b
[381509.328749] Corrupted low memory at ffff880000008000 (8000 phys) = 000eb445
and so on.
I have never seen this before. I just copied about 650 GB of data off a NTFS
filesystem attached via USB, and I can't say that I've done that before on this
new laptop.
In the course of filing this bug, I just noticed these recent messages also.
I'm pasting it here just in case it's part of the same bug. I can create
another report once we know it's just a coincidence.
[327800.452462] [drm] stuck on render ring
[327800.453244] [drm] GPU HANG: ecode 7:0:0x85dffff8, in kscreenlocker_g
[20006], reason: Ring hung
, action: reset
[327800.453388] ------------[ cut here ]------------
[327800.453414] WARNING: CPU: 1 PID: 19818 at
../drivers/gpu/drm/i915/intel_display.c:11289 intel_m
mio_flip_work_func+0x385/0x3c0 [i915]()
[327800.453416] WARN_ON(__i915_wait_request(mmio_flip->req,
mmio_flip->crtc->reset_counter, false,
NULL, &mmio_flip->i915->rps.mmioflips))
[327800.453417] Modules linked in:
[327800.453418] rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace
sunrpc fscache fuse
rfcomm af_packet vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) ip6t_REJECT
nf_log_ipv6 nf_conn
track_ipv6 nf_defrag_ipv6 ip6table_raw ipt_REJECT xt_tcpudp xt_pkttype
nf_log_ipv4 nf_log_common xt
_LOG xt_limit iptable_raw xt_CT iptable_filter ip6table_mangle
nf_conntrack_netbios_ns nf_conntrack
_broadcast nf_conntrack_ipv4 nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack
ip6table_filter ip6
_tables x_tables bnep nls_iso8859_1 nls_cp437 vfat fat snd_hda_codec_via(O)
snd_hda_codec_hdmi(O) s
nd_hda_codec_generic(O) arc4 snd_hda_intel(O) rtl8723be x86_pkg_temp_thermal
intel_powerclamp btcoe
xist snd_hda_codec(O) coretemp rtl8723_common rtl_pci uvcvideo kvm_intel btusb
snd_soc_rt5640 rtlwifi videobuf2_vmalloc
[327800.453448] iTCO_wdt snd_soc_rl6231 btrtl kvm snd_soc_core btbcm
snd_hda_core irqbypass iTCO_vendor_support videobuf2_memops btintel mac80211
snd_hwdep snd_compress videobuf2_v4l2 bluetooth pcspkr joydev rtsx_pci_ms
snd_pcm videobuf2_core battery elan_i2c memstick cfg80211 regmap_i2c
v4l2_common videodev snd_timer rfkill i2c_designware_platform wmi i2c_i801
i2c_designware_core 8250_dw mei_me snd snd_soc_sst_acpi ie31200_edac tpm_crb ac
thermal mei lpc_ich tpm_tis shpchp soundcore edac_core tpm btrfs xor raid6_pq
drbg ansi_cprng dm_crypt twofish_generic twofish_avx_x86_64 twofish_x86_64_3way
xts twofish_x86_64 twofish_common algif_skcipher af_alg hid_generic usbhid
rtsx_pci_sdmmc
i915 i2c_algo_bit crct10dif_pclmul crc32_pclmul crc32c_intel drm_kms_helper
syscopyarea sysfillrect
sysimgblt xhci_pci
[327800.453481] fb_sys_fops aesni_intel xhci_hcd ehci_pci aes_x86_64
glue_helper lrw ehci_hcd gf12
8mul ablk_helper rtsx_pci r8169 cryptd mfd_core mii drm serio_raw usbcore
usb_common video sdhci_ac
pi sdhci button mmc_core i2c_hid fjes dm_mod sg efivarfs
[327800.453496] CPU: 1 PID: 19818 Comm: kworker/1:1 Tainted: G W O
4.4.0-3-default #1
[327800.453497] Hardware name: GIGABYTE P17FV3/P17FV3, BIOS 1.03.04RGI2
05/13/2015
[327800.453512] Workqueue: events intel_mmio_flip_work_func [i915]
[327800.453513] ffffffffa0541f00 ffff88034d66bd30 ffffffff8137ea39
ffff88034d66bd78
[327800.453515] ffff88034d66bd68 ffffffff8107c542 ffff8800071221c0
ffff88041fa56680
[327800.453517] ffffe8ffffc41100 0000000000000040 ffff8800071221c0
ffff88034d66bdc8
[327800.453519] Call Trace:
[327800.453526] [<ffffffff8101a095>] try_stack_unwind+0x175/0x190
[327800.453530] [<ffffffff81018fe9>] dump_trace+0x69/0x3a0
[327800.453533] [<ffffffff8101a0fb>] show_trace_log_lvl+0x4b/0x60
[327800.453536] [<ffffffff8101942c>] show_stack_log_lvl+0x10c/0x180
[327800.453538] [<ffffffff8101a195>] show_stack+0x25/0x50
[327800.453541] [<ffffffff8137ea39>] dump_stack+0x4b/0x72
[327800.453546] [<ffffffff8107c542>] warn_slowpath_common+0x82/0xc0
[327800.453549] [<ffffffff8107c5cc>] warn_slowpath_fmt+0x4c/0x50
[327800.453562] [<ffffffffa04dd2a5>] intel_mmio_flip_work_func+0x385/0x3c0
[i915]
[327800.453571] [<ffffffff810942f9>] process_one_work+0x159/0x470
[327800.453574] [<ffffffff81094658>] worker_thread+0x48/0x4a0
[327800.453576] [<ffffffff8109a2b9>] kthread+0xc9/0xe0
[327800.453582] [<ffffffff816a980f>] ret_from_fork+0x3f/0x70
[327800.455044] DWARF2 unwinder stuck at ret_from_fork+0x3f/0x70
[327800.455046] Leftover inexact backtrace:
[327800.455050] [<ffffffff8109a1f0>] ? kthread_worker_fn+0x170/0x170
[327800.455051] ---[ end trace f47db7ba27e6f36e ]---
[327800.455411] drm/i915: Resetting chip after gpu hang
That message about stuck on render ring, seems to happen on its own a few
times.