[Bug 105887] [GLK] no signal after switch resolution from 1080p at 23.98

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105887

--- Comment #91 from user.forums at gmail.com ---
(In reply to Clinton Taylor from comment #90)
> (In reply to user.forums from comment #84)
> > (In reply to user.forums from comment #83)
> > > (In reply to Clinton Taylor from comment #82)
> > > > It will probably apply to 4.17. It's not much different than the 50ms wait
> > > > you were using before. The patch just detects a GLK NUC before waiting 42ms.
> > > > 
> > > > I would like some tests to make sure a 42ms delay is enough. I probably ran
> > > > 200 cycles in testing, but would really like more to confirm the workaround.
> > > 
> > > The good news is your patch applies to 4.17. The bad news is it doesn't work
> > > here going from a NUC7PJYH -> Sony surround receiver -> Panasonic TV.
> > 
> 
> Could you run lspci -vvn -s00:02.0 from a console prompt and post the
> results?
> 
> Thanks,
> Clint

Sure thing..

~$ lspci -vvn -s00:02.0
00:02.0 0300: 8086:3184 (rev 03) (prog-if 00 [VGA controller])
        Subsystem: 8086:2072
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 124
        Region 0: Memory at a0000000 (64-bit, non-prefetchable) [size=16M]
        Region 2: Memory at 90000000 (64-bit, prefetchable) [size=256M]
        Region 4: I/O ports at f000 [size=64]
        [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
        Capabilities: <access denied>
        Kernel driver in use: i915
        Kernel modules: i915

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