Public bug reported:
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 ]---
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1445775
Title:
RTL8723BE throws stack trace in kernel 3.19 and disconnects
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