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.
-- 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 0000:00:02.0: PCI INT A -> > GSI 16 (level, low) -> IRQ 16 > May 17 13:30:36 tiger kernel: [ 15.458760] i915 0000:00:02.0: setting > latency timer to 64 > May 17 13:30:36 tiger kernel: [ 15.513847] i915 0000:00:02.0: irq 52 for > MSI/MSI-X > May 17 13:30:36 tiger kernel: [ 16.011208] [drm] Initialized i915 1.6.0 > 20080730 for 0000:00:02.0 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 -vvvv 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-<MAbort->SERR-<PERR- INTx- > Latency: 0 > Interrupt: pin A routed to IRQ 52 > Region 0: Memory at f1400000 (64-bit, non-prefetchable) [size=4M] > Region 2: Memory at e0000000 (64-bit, prefetchable) [size=256M] > Region 4: I/O ports at 4000 [size=64] > Expansion ROM at<unassigned> [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) > 00:16.0 Communication controller: Intel Corporation 6 Series Chipset Family > MEI Controller #1 (rev 04) > 00:1a.0 USB Controller: Intel Corporation 6 Series Chipset Family USB > Enhanced Host Controller #2 (rev 05) > 00:1b.0 Audio device: Intel Corporation 6 Series Chipset Family High > Definition Audio Controller (rev 05) > 00:1c.0 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express > Root Port 1 (rev b5) > 00:1c.1 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express > Root Port 2 (rev b5) > 00:1c.3 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express > Root Port 4 (rev b5) > 00:1c.4 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express > Root Port 5 (rev b5) > 00:1c.5 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express > Root Port 6 (rev b5) > 00:1d.0 USB Controller: Intel Corporation 6 Series Chipset Family USB > Enhanced Host Controller #1 (rev 05) > 00:1f.0 ISA bridge: Intel Corporation HM67 Express Chipset Family LPC > Controller (rev 05) > 00:1f.2 SATA controller: Intel Corporation 6 Series Chipset Family 6 port > SATA AHCI Controller (rev 05) > 00:1f.3 SMBus: Intel Corporation 6 Series Chipset Family SMBus Controller > (rev 05) > 01:00.0 VGA compatible controller: nVidia Corporation Device 0df5 (rev a1) > 03:00.0 Network controller: Intel Corporation Centrino Wireless-N 1000 > 04:00.0 USB Controller: NEC Corporation uPD720200 USB 3.0 Host Controller > (rev 04) > 06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B > PCI Express Gigabit Ethernet controller (rev 06) > > ver_linux output: > Linux tiger 2.6.39-rc7+ #3 SMP Sun May 15 11:31:14 CEST 2011 x86_64 GNU/Linux > > Gnu C 4.6.1 > Gnu make 3.81 > binutils 2.21.51.20110421 > util-linux 2.17.2 > mount support > module-init-tools 3.12 > e2fsprogs 1.41.12 > pcmciautils 018 > PPP 2.4.5 > Linux C Library 2.13 > Dynamic linker (ldd) 2.13 > Procps 3.2.8 > Net-tools 1.60 > Kbd 1.15.2 > Sh-utils 8.5 > wireless-tools 30 > Modules Loaded parport_pc ppdev lp parport bluetooth acpi_cpufreq > mperf cpufreq_stats cpufreq_conservative cpufreq_userspace cpufreq_powersave > vboxnetadp binfmt_misc vboxnetflt vboxdrv uinput fuse ip6t_LOG > nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipt_LOG xt_tcpudp > nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack iptable_filter > ip_tables x_tables ext2 nouveau ttm loop snd_hda_codec_hdmi > snd_hda_codec_realtek uvcvideo videodev v4l2_compat_ioctl32 joydev arc4 ecb > snd_hda_intel iwlagn snd_hda_codec i915 snd_hwdep snd_pcm drm_kms_helper > mac80211 snd_seq snd_timer snd_seq_device drm snd cfg80211 dell_wmi soundcore > dell_laptop psmouse sparse_keymap processor battery ac i2c_algo_bit i2c_i801 > rfkill snd_page_alloc i2c_core video button dcdbas power_supply pcspkr wmi > evdev serio_raw ext3 jbd mbcache sha256_generic cryptd aes_x86_64 aes_generic > cbc dm_crypt dm_mod sg usbhid usb_storage hid sd_mod sr_mod uas cdrom > crc_t10dif xhci_hcd ahci libahci libata s > > csi_mod r8169 ehci_hcd thermal thermal_sys usbcore mii > > BR, > -- > Eric Leblond > > _______________________________________________ > dri-devel mailing list > dri-devel at lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/dri-devel >