[Bug 99295] [Regression BDW] kernel panic in Intel i915 module, complete system freeze in 4.10-rc2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99295

--- Comment #52 from Helio Loureiro <helio at loureiro.eng.br> ---
(In reply to Maël Lavault from comment #51)
> I've been testing 4.11.1-drmfixb and I havent had any issues so far.
> 
> I get some messages in the journal but no freeze:
> 
> [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO
> underrun

Hi,

Same here.  I applied manually the changes over kernel 4.11.2.  I see messages
like this:

May 25 19:30:04 elxaf7qtt32 kernel: [drm] Reducing the compressed framebuffer
size. This may lead to less power savings than a non-reduced-size. Try to
increase stolen memory size if available in BIOS.
May 25 19:39:58 elxaf7qtt32 kernel: [drm] Reducing the compressed framebuffer
size. This may lead to less power savings than a non-reduced-size. Try to
increase stolen memory size if available in BIOS.
May 26 16:17:15 elxaf7qtt32 kernel: [drm] Reducing the compressed framebuffer
size. This may lead to less power savings than a non-reduced-size. Try to
increase stolen memory size if available in BIOS.
May 26 20:26:10 elxaf7qtt32 kernel: [drm] Reducing the compressed framebuffer
size. This may lead to less power savings than a non-reduced-size. Try to
increase stolen memory size if available in BIOS.
May 26 21:02:39 elxaf7qtt32 kernel: [drm] Reducing the compressed framebuffer
size. This may lead to less power savings than a non-reduced-size. Try to
increase stolen memory size if available in BIOS.
May 26 21:03:10 elxaf7qtt32 kernel: [drm] Reducing the compressed framebuffer
size. This may lead to less power savings than a non-reduced-size. Try to
increase stolen memory size if available in BIOS.
May 26 21:39:46 elxaf7qtt32 kernel: [drm] Reducing the compressed framebuffer
size. This may lead to less power savings than a non-reduced-size. Try to
increase stolen memory size if available in BIOS.
May 27 14:01:40 elxaf7qtt32 kernel: [drm] Reducing the compressed framebuffer
size. This may lead to less power savings than a non-reduced-size. Try to
increase stolen memory size if available in BIOS.
May 27 18:09:44 elxaf7qtt32 kernel: [drm] Reducing the compressed framebuffer
size. This may lead to less power savings than a non-reduced-size. Try to
increase stolen memory size if available in BIOS.

but nothing else.  No hangs, no lags, nothing.

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