[Bug 79261] [snb] [Samsung NP530U3C-A02CL] [drm:ilk_display_irq_handler] *ERROR* Pipe A FIFO underrun

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=79261

--- Comment #9 from Marcelo Ricardo Leitner <marcelo.leitner at gmail.com> ---
Happens with 3.18.0-rc2:
Lenovo T510, i5-M540
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated
Graphics Controller (rev 02)

Xorg.0.log seems clean, but dmesg:

[   62.939582] [drm:ibx_irq_handler] *ERROR* PCH transcoder A FIFO underrun
[   62.973106] ------------[ cut here ]------------
[   62.973187] WARNING: CPU: 2 PID: 1169 at
drivers/gpu/drm/i915/intel_display.c:901 intel_wait_for_vblank+0x20d/0x220
[i915]()
[   62.973191] vblank wait on pipe B timed out
[   62.973193] Modules linked in: rfcomm ipt_MASQUERADE nf_nat_masquerade_ipv4
xt_CHECKSUM tun rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache
nf_conntrack_ipv6 nf_defrag_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge
stp llc ebtable_filter ebtables ip6table_mangle ip6table_security ip6table_raw
ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4
nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw
bnep dm_crypt arc4 iwldvm mac80211 iwlwifi snd_hda_codec_hdmi coretemp
snd_hda_codec_conexant kvm_intel snd_hda_codec_generic iTCO_wdt
iTCO_vendor_support kvm ppdev snd_hda_intel mxm_wmi snd_hda_controller
snd_hda_codec uvcvideo cfg80211 btusb snd_hwdep bluetooth snd_seq
videobuf2_vmalloc videobuf2_core crct10dif_pclmul videobuf2_memops crc32_pclmul
snd_seq_device
[   62.973243]  v4l2_common crc32c_intel videodev snd_pcm ghash_clmulni_intel
microcode media nfsd thinkpad_acpi sdhci_pci joydev sdhci serio_raw pcspkr
mmc_core snd_timer snd i2c_i801 intel_ips lpc_ich mei_me tpm_tis mfd_core mei
shpchp tpm parport_pc auth_rpcgss soundcore rfkill parport nfs_acl lockd wmi
acpi_cpufreq grace sunrpc binfmt_misc xfs libcrc32c i915 i2c_algo_bit
drm_kms_helper drm e1000e ptp pps_core i2c_core video
[   62.973269] CPU: 2 PID: 1169 Comm: X Tainted: P               3.18.0-rc2 #1
[   62.973271] Hardware name: LENOVO 4384AU2/4384AU2, BIOS 6MET81WW (1.41 )
10/26/2010
[   62.973272]  0000000000000000 00000000295aec97 ffff880035037ad8
ffffffff8174b3e9
[   62.973275]  0000000000000000 ffff880035037b30 ffff880035037b18
ffffffff81096a61
[   62.973277]  ffff880035037b08 ffff88022af70000 0000000000071040
0000000000000dd1
[   62.973279] Call Trace:
[   62.973288]  [<ffffffff8174b3e9>] dump_stack+0x4f/0x7c
[   62.973293]  [<ffffffff81096a61>] warn_slowpath_common+0x81/0xa0
[   62.973296]  [<ffffffff81096ad5>] warn_slowpath_fmt+0x55/0x70
[   62.973315]  [<ffffffffa014723d>] intel_wait_for_vblank+0x20d/0x220 [i915]
[   62.973332]  [<ffffffffa016999d>] intel_dp_link_down+0x1bd/0x240 [i915]
[   62.973349]  [<ffffffffa0169e62>] ilk_post_disable_dp+0x22/0xe0 [i915]
[   62.973364]  [<ffffffffa01518f4>] ironlake_crtc_disable+0xf4/0x7d0 [i915]
[   62.973368]  [<ffffffff810c0cf1>] ? get_parent_ip+0x11/0x50
[   62.973384]  [<ffffffffa014b2c9>] intel_crtc_control+0x59/0x120 [i915]
[   62.973400]  [<ffffffffa014b3f7>] intel_crtc_update_dpms+0x67/0x80 [i915]
[   62.973416]  [<ffffffffa01547a1>] intel_connector_dpms+0x61/0x70 [i915]
[   62.973431]  [<ffffffffa0088529>]
drm_mode_obj_set_property_ioctl+0x359/0x370 [drm]
[   62.973441]  [<ffffffffa008857f>]
drm_mode_connector_property_set_ioctl+0x3f/0x60 [drm]
[   62.973449]  [<ffffffffa0078b9c>] drm_ioctl+0x1ec/0x660 [drm]
[   62.973454]  [<ffffffff81618fb1>] ? sock_aio_read+0x21/0x40
[   62.973458]  [<ffffffff8120f0b7>] ? do_sync_read+0x67/0xa0
[   62.973461]  [<ffffffff81223710>] do_vfs_ioctl+0x2e0/0x4a0
[   62.973465]  [<ffffffff81135644>] ? __audit_syscall_entry+0xb4/0x110
[   62.973469]  [<ffffffff81023fdc>] ? do_audit_syscall_entry+0x6c/0x70
[   62.973471]  [<ffffffff81223951>] SyS_ioctl+0x81/0xa0
[   62.973473]  [<ffffffff81135896>] ? __audit_syscall_exit+0x1f6/0x2a0
[   62.973476]  [<ffffffff81752ba9>] system_call_fastpath+0x12/0x17
[   62.973478] ---[ end trace 0527179b16be94cc ]---
[   63.416791] [drm:ibx_irq_handler] *ERROR* PCH transcoder B FIFO underrun

Please let me know if you need anything else.

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