Hello,
On Wed, 2011-05-18 at 11:22 -0500, Michael Larabel wrote:
> Try booting the latest kernel with "i915.semaphores=1" and it should be
> fixed, at least for my SNB hardware. When I had it auto-bisected it came
> down to this commit 087fbc9962e10a65fb0b542ecfc116ebf6cf1735 that
> disabled semaphores.
I confirm that it is working fine when enabling semaphore. Thanks a lot
for the workaround, it is a pleasure to have a real laptop again ;)
Good luck for the bisect.
BR,
>
> -- Michael Larabel
>
> On 05/17/2011 07:06 AM, Eric Leblond wrote:
> > Hello,
> >
> > When running the 2.6.39-rc7, I've observed a problem on my laptop (DELL
> > XPS15) which uses the i915 driver. Frequently, when moving the mouse
> > over, the cursor does only trigger the modification on the desktop after
> > a few seconds (like icons
> > highligthing). When this occurs, the following message appear in the
> > kernel log at the moment when the waited action occurs:
> >
> > [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer elapsed... blt ring
> > idle [waiting on 905, at 905], missed IRQ?
> >
> > Switching back to 2.6.39-rc6 fixes the issue.
> >
> > It runs gnome 3 which uses glx to add some effect. Maybe this is linked.
> > When using the simple twm window manager, the problem does not seem to
> > occur.
> >
> > Keywords: drm, i915
> > Kernel version: Linux version 2.6.39-rc7+ (eric at tiger) (gcc version
> > 4.6.1 20110507 (prerelease) (Debian 4.6.0-7) ) #3 SMP Sun May 15 11:31:14
> > CEST 2011
> > Processor: Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz
> >
> > Kernel log for i915:
> > May 17 13:30:36 tiger kernel: [ 15.458754] i915 :00:02.0: PCI INT A
> > -> GSI 16 (level, low) -> IRQ 16
> > May 17 13:30:36 tiger kernel: [ 15.458760] i915 :00:02.0: setting
> > latency timer to 64
> > May 17 13:30:36 tiger kernel: [ 15.513847] i915 :00:02.0: irq 52 for
> > MSI/MSI-X
> > May 17 13:30:36 tiger kernel: [ 16.011208] [drm] Initialized i915 1.6.0
> > 20080730 for :00:02.0 on minor 0
> > May 17 13:31:12 tiger kernel: [ 59.343937] [drm:i915_hangcheck_ring_idle]
> > *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 905, at 905],
> > missed IRQ?
> > May 17 13:31:17 tiger kernel: [ 63.998439] [drm:i915_hangcheck_ring_idle]
> > *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 947, at 947],
> > missed IRQ?
> > May 17 13:32:27 tiger kernel: [ 134.591975] [drm:i915_hangcheck_ring_idle]
> > *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 49015, at
> > 49015], missed IRQ?
> > May 17 13:32:29 tiger kernel: [ 136.127493] [drm:i915_hangcheck_ring_idle]
> > *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 49154, at
> > 49154], missed IRQ?
> >
> > lspci - for i915:
> > 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
> > Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA
> > controller])
> > Subsystem: Dell Device 04b6
> > Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> > ParErr- Stepping- SERR- FastB2B- DisINTx+
> > Status: Cap+ 66MHz- UDF- FastB2B+ ParErr-
> > DEVSEL=fast>TAbort-<TAbort-SERR- > Latency: 0
> > Interrupt: pin A routed to IRQ 52
> > Region 0: Memory at f140 (64-bit, non-prefetchable) [size=4M]
> > Region 2: Memory at e000 (64-bit, prefetchable) [size=256M]
> > Region 4: I/O ports at 4000 [size=64]
> > Expansion ROM at [disabled]
> > Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
> > Address: fee0300c Data: 41c9
> > Capabilities: [d0] Power Management version 2
> > Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
> > PME(D0-,D1-,D2-,D3hot-,D3cold-)
> > Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
> > Capabilities: [a4] PCI Advanced Features
> > AFCap: TP+ FLR+
> > AFCtrl: FLR-
> > AFStatus: TP-
> > Kernel driver in use: i915
> >
> > lspci:
> > 00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family
> > DRAM Controller (rev 09)
> > 00:01.0 PCI bridge: Intel Corporation 2nd Generation Core Processor Family
> > PCI Express Root Port (rev 09)
> > 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
> > Processor Family Integrated Graphics Controller (rev 09)
> > 00:16.
