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On 2013-12-17T10:02:50+00:00 Colin King wrote:

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.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1251065/comments/7

------------------------------------------------------------------------
On 2013-12-17T10:09:17+00:00 Chris Wilson wrote:

Start off with a drm.debug=6 dmesg just so we can get a feel for the
hardware and what is going on. If you revert the switchless resume
patch, then grab intel_reg_dumper output before and after resume, that
will highlight what the bios touched. In fact, if you grab
intel_reg_dumper after resume with each patch reverted (none, only
switchless patch reverted, both patches reverted) that is likely to have
sufficient information to figure out both bugs.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1251065/comments/8


** Changed in: linux
       Status: Unknown => Confirmed

** Changed in: linux
   Importance: Unknown => High

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https://bugs.launchpad.net/bugs/1251065

Title:
  HP Mini 1000 fails to resume from suspend

Status in The Linux Kernel:
  Confirmed
Status in “linux” package in Ubuntu:
  In Progress

Bug description:
  Booting various kernels including the mainline 3.12 kernel, HP Mini
  1000 does not resume from suspend. Problem seems to have begun
  following update to 13.10, including kernels 3.9, 3.10, 3.11.

  Ran steps on DebuggingKernelSuspend wiki page at
  https://wiki.ubuntu.com/DebugginKernelSuspend#A.22resume-
  trace.22_debugging_procedure_for_finding_buggy_drivers.

  Attached: dmesg.txt
  --- 
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: i386
  DistroRelease: Ubuntu 13.10
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2013-11-12 (1 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release i386 (20131016.1)
  MarkForUpload: True
  NonfreeKernelModules: wl
  Package: linux (not installed)
  Tags:  saucy
  Uname: Linux 3.12.0-031200-generic i686
  UnreportableReason: The running kernel is not an Ubuntu kernel
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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