[Intel-gfx] S3 resume and commit 24576d23976746cb52e7700c4cadbf4bc1bc3472

[Daniel Vetter]

On Mon, Dec 16, 2013 at 7:52 PM, Colin Ian King
<colin.king at canonical.com> wrote:
> Hi there,
>
> There is a S3 resume issue that affects HP Mini Atom N270 with Intel
> Mobile 945GSE on Linux 3.9.0 upwards.
>
> Device:
> 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile
> 945GSE Express Integrated Graphics Controller [8086:27ae] (rev 03)
> (prog-if 00 [VGA controller])
>         Subsystem: Hewlett-Packard Company Device [103c:361a]
>         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
>         Interrupt: pin A routed to IRQ 16
>         Region 0: Memory at fe980000 (32-bit, non-prefetchable) [size=512K]
>         Region 1: I/O ports at dc80 [size=8]
>         Region 2: Memory at d0000000 (32-bit, prefetchable) [size=256M]
>         Region 3: Memory at fe940000 (32-bit, non-prefetchable) [size=256K]
>         Expansion ROM at <unassigned> [disabled]
>         Capabilities: <access denied>
>         Kernel driver in use: i915
>
> Issue: On S3 resume screen is blank.  I've tracked this down to 2 patches:
>
> 1. 24576d23976746cb52e7700c4cadbf4bc1bc3472
>
> drm/i915: enable VT switchless resume v3
>
> This commit stops the screen from turning back on. Without the patch the
> screen resumes back to on, however it is filled with random vertical lines.
>
> 2. fa55583797d12b10928a1813f3dcf066637caf5e
>
> drm/i915: fixup the plane->pipe fixup code
>
> I have to manually revert this.  If I don't I get the random vertical
> lines on resume.
>
> Any ideas on how to address these two issues that cause S3 resume to
> leave the HP mini in a broken state?

Please file a bug report on bugs.freedesktop.org against DRI ->
DRM(Intel). Also please always cc relevant mailing lists when
reporting kernel issues.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch