[Bug 95461] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=95461

Paul Menzel <paulepanter at users.sourceforge.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |paulepanter at users.sourcefor
                   |                            |ge.net

--- Comment #29 from Paul Menzel <paulepanter at users.sourceforge.net> ---
I am able to reproduce this with Lenovo T60.

```
$ sudo lspci -v -s 0:02
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS,
943/940GML Express Integrated Graphics Controller (rev 03) (prog-if 00 [VGA
controller])
    Subsystem: Lenovo ThinkPad R60/T60/X60 series
    Flags: bus master, fast devsel, latency 0, IRQ 16
    Memory at e4300000 (32-bit, non-prefetchable) [size=512K]
    I/O ports at 50a0 [size=8]
    Memory at d0000000 (32-bit, prefetchable) [size=256M]
    Memory at e4400000 (32-bit, non-prefetchable) [size=256K]
    Expansion ROM at <unassigned> [disabled]
    Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-
    Capabilities: [d0] Power Management version 2
    Kernel driver in use: i915

00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML
Express Integrated Graphics Controller (rev 03)
    Subsystem: Lenovo ThinkPad R60/T60/X60 series
    Flags: bus master, fast devsel, latency 0
    Memory at e4380000 (32-bit, non-prefetchable) [size=512K]
    Capabilities: [d0] Power Management version 2

```

```
Sep 26 19:12:12 my-t60 kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]]
*ERROR* CPU pipe A FIFO underrun
Sep 26 19:12:12 my-t60 kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]]
*ERROR* CPU pipe B FIFO underrun
```

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