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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1445775

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1445775

Title:
  RTL8723BE throws stack trace in kernel 3.19 and disconnects

Status in The Linux Kernel:
  Incomplete
Status in linux package in Ubuntu:
  New

Bug description:
  Hi,

  I have the well known, problem causing, RTL8723BE wifi card on Lenovo
  Flex 2 laptop and I'm running Ubuntu 15.04 beta. If there is too much
  traffic through the wifi card like downloading an iso via torrent , I
  get a stacktrace and the wifi disconnects and does not connect
  automatically. Either I have to disable the wifi and re-enable it or I
  have to restart my laptop to get the wifi connection back.

  the stack trace is below

  Apr 18 18:16:23 flex2 kernel: ------------[ cut here ]------------
  Apr 18 18:16:23 flex2 kernel: WARNING: CPU: 0 PID: 0 at /build/buildd/linux-3.19.0/drivers/gpu/drm/i915/intel_display.c:9713 intel_check_page_flip+0xda/0xf0 [i915]()
  Apr 18 18:16:23 flex2 kernel: Kicking stuck page flip: queued at 169616, now 169621
  Apr 18 18:16:23 flex2 kernel: Modules linked in: uas usb_storage vmw_vsock_vmci_transport vsock vmw_vmci pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) ctr ccm rfcomm bnep thinkpad_acpi binfmt_misc nvram msr nls_iso8859_1 intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul snd_soc_rt5640 crc32_pclmul snd_soc_rl6231 ghash_clmulni_intel uvcvideo videobuf2_vmalloc videobuf2_memops aesni_intel snd_soc_core snd_hda_codec_realtek snd_hda_codec_hdmi snd_compress snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec snd_pcm_dmaengine hid_multitouch aes_x86_64 snd_hwdep arc4 videobuf2_core snd_pcm v4l2_common rtl8723be btusb btcoexist rtl8723_common lrw rtl_pci nouveau rtlwifi mac80211 i915 bluetooth cfg80211 gf128mul snd_seq_midi glue_helper mxm_wmi
  Apr 18 18:16:23 flex2 kernel:  videodev snd_seq_midi_event ablk_helper media ttm snd_rawmidi cryptd joydev snd_seq dm_multipath snd_seq_device scsi_dh drm_kms_helper mei_me snd_timer dw_dmac ideapad_laptop drm snd mei sparse_keymap shpchp lpc_ich i2c_hid snd_soc_sst_acpi i2c_algo_bit i2c_designware_platform video soundcore dw_dmac_core 8250_dw i2c_designware_core spi_pxa2xx_platform mac_hid serio_raw wmi ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 nf_log_ipv4 nf_log_common xt_LOG xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack iptable_filter ip_tables sunrpc x_tables parport_pc ppdev lp parport autofs4
  Apr 18 18:16:23 flex2 kernel:  usbhid hid psmouse ahci libahci r8169 mii dm_mirror dm_region_hash dm_log sdhci_acpi sdhci
  Apr 18 18:16:23 flex2 kernel: CPU: 0 PID: 0 Comm: swapper/0 Tainted: G        W  OE  3.19.0-12-generic #12-Ubuntu
  Apr 18 18:16:23 flex2 kernel: Hardware name: LENOVO 20404/Lenovo Flex 2-14, BIOS A0CN21WW 03/21/2014
  Apr 18 18:16:23 flex2 kernel:  ffffffffc0748e10 ffff88012f203d28 ffffffff817c2175 0000000000000007
  Apr 18 18:16:23 flex2 kernel:  ffff88012f203d78 ffff88012f203d68 ffffffff8107595a ffff88012f203d88
  Apr 18 18:16:23 flex2 kernel:  ffff88012a898000 ffff8800bf12a000 0000000000000000 ffff8800bf12a1a8
  Apr 18 18:16:23 flex2 kernel: Call Trace:
  Apr 18 18:16:23 flex2 kernel:  <IRQ>  [<ffffffff817c2175>] dump_stack+0x45/0x57
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff8107595a>] warn_slowpath_common+0x8a/0xc0
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff810759d6>] warn_slowpath_fmt+0x46/0x50
  Apr 18 18:16:23 flex2 kernel:  [<ffffffffc06f4a3a>] intel_check_page_flip+0xda/0xf0 [i915]
  Apr 18 18:16:23 flex2 kernel:  [<ffffffffc06c1948>] ironlake_irq_handler+0x2e8/0xfd0 [i915]
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff810b0dff>] ? rebalance_domains+0x16f/0x280
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff810d5ba0>] ? __note_gp_changes+0x20/0x60
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff810cd577>] handle_irq_event_percpu+0x77/0x1a0
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff810cd6e1>] handle_irq_event+0x41/0x70
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff810d074e>] handle_edge_irq+0x6e/0x120
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff81017772>] handle_irq+0x22/0x40
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff817cc1bf>] do_IRQ+0x4f/0xf0
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff817ca02d>] common_interrupt+0x6d/0x6d
  Apr 18 18:16:23 flex2 kernel:  <EOI>  [<ffffffff81664335>] ? cpuidle_enter_state+0x65/0x160
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff81664321>] ? cpuidle_enter_state+0x51/0x160
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff81664517>] cpuidle_enter+0x17/0x20
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff810b69c1>] cpu_startup_entry+0x311/0x3b0
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff817b6a47>] rest_init+0x77/0x80
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff81d4cfce>] start_kernel+0x482/0x48f
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff81d4c120>] ? early_idt_handlers+0x120/0x120
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff81d4c4d7>] x86_64_start_reservations+0x2a/0x2c
  Apr 18 18:16:23 flex2 kernel:  [<ffffffff81d4c61c>] x86_64_start_kernel+0x143/0x152
  Apr 18 18:16:23 flex2 kernel: ---[ end trace 78327f32f7248597 ]---

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