[Bug 89518] *ERROR* PCH transcoder A FIFO underrun

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89518

--- Comment #8 from stefan at gsresing.de ---
I have the same problem with my Lenovo Laptop.

System: Ubuntu 15/04
Kernel: 4.3-rc6

[    0.790147] [drm] Initialized drm 1.1.0 20060810
[    0.791429] [drm] Memory usable by graphics device = 2048M
[    0.791434] [drm] Replacing VGA console driver
[    0.797296] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    0.797302] [drm] Driver supports precise vblank timestamp query.
[    0.829415] [drm] Initialized i915 1.6.0 20150731 for 0000:00:02.0 on minor
0
[    0.890099] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to bit
banging on pin 5
[    0.899685] fbcon: inteldrmfb (fb0) is primary device
[    1.158586] [drm:intel_set_pch_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder A
[    1.158589] [drm:intel_pch_fifo_underrun_irq_handler] *ERROR* PCH transcoder
A FIFO underrun
[    1.691859] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device


--------------------

cat /proc/cpuinfo 
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 58
model name      : Intel(R) Core(TM) i5-3230M CPU @ 2.60GHz
stepping        : 9
microcode       : 0x1b
cpu MHz         : 1445.132
cache size      : 3072 KB
physical id     : 0
siblings        : 4
core id         : 0
cpu cores       : 2
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm
constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc
aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16
xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx
f16c rdrand lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority
ept vpid fsgsbase smep erms xsaveopt
bugs            :
bogomips        : 5187.74
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor       : 1
vendor_id       : GenuineIntel
cpu family      : 6
model           : 58
model name      : Intel(R) Core(TM) i5-3230M CPU @ 2.60GHz
stepping        : 9
microcode       : 0x1b
cpu MHz         : 1293.093
cache size      : 3072 KB
physical id     : 0
siblings        : 4
core id         : 0
cpu cores       : 2
apicid          : 1
initial apicid  : 1
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm
constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc
aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16
xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx
f16c rdrand lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority
ept vpid fsgsbase smep erms xsaveopt
bugs            :
bogomips        : 5187.74
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor       : 2
vendor_id       : GenuineIntel
cpu family      : 6
model           : 58
model name      : Intel(R) Core(TM) i5-3230M CPU @ 2.60GHz
stepping        : 9
microcode       : 0x1b
cpu MHz         : 2984.820
cache size      : 3072 KB
physical id     : 0
siblings        : 4
core id         : 1
cpu cores       : 2
apicid          : 2
initial apicid  : 2
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm
constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc
aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16
xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx
f16c rdrand lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority
ept vpid fsgsbase smep erms xsaveopt
bugs            :
bogomips        : 5187.74
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor       : 3
vendor_id       : GenuineIntel
cpu family      : 6
model           : 58
model name      : Intel(R) Core(TM) i5-3230M CPU @ 2.60GHz
stepping        : 9
microcode       : 0x1b
cpu MHz         : 2622.140
cache size      : 3072 KB
physical id     : 0
siblings        : 4
core id         : 1
cpu cores       : 2
apicid          : 3
initial apicid  : 3
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm
constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc
aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16
xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx
f16c rdrand lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority
ept vpid fsgsbase smep erms xsaveopt
bugs            :
bogomips        : 5187.74
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

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