Dear maintainers,
On an Asus Zenbook UX32VD laptop with an i5-3317U CPU and Intel HD4000 graphics, I'm experiencing the following with the latest 3.19rc6 mainline kernel (built from the Arch Linux AUR package: https://aur.archlinux.org/packages/linux-mainline/ ). The problem is related to the compton compositor: https://github.com/chjj/compton
Booting to X goes very normally. Then, I start compton with the command `compton --backend glx`. As soon as I do that, the dmesg log starts getting filled with these warnings. This is a snippet from my journalctl log:
1 Feb 02 00:06:44 stroemsoe kernel: WARNING: CPU: 0 PID: 273 at drivers/gpu/drm/i915/intel_display.c:9705 intel_check_page_flip+0xa2/0xf0 [i915]() 1421 Feb 02 00:06:44 stroemsoe kernel: WARN_ON(!in_irq()) 1 Feb 02 00:06:44 stroemsoe kernel: Modules linked in: 2 Feb 02 00:06:44 stroemsoe kernel: joydev mousedev msr uvcvideo rtsx_usb_sdmmc videobuf2_vmalloc rtsx_usb_ms videobuf2_memops mmc_core memstick videobuf2_core n ls_iso8859_1 rtsx_usb v4l2_common nls_cp437 videodev vfat fat coretemp intel_rapl media iosf_mbi x86_pkg_temp_thermal intel_powerclamp arc4 kvm_intel kvm iwldvm crct10dif_pclmul crc32_pclmul iTCO_wdt mac80211 iTCO_vendor_support crc32c_intel ghash_clmulni_intel snd_hda_codec_hdmi nouveau aesni_intel i915 aes_x86_64 snd _hda_codec_realtek glue_helper lrw gf128mul ablk_helper snd_hda_codec_generic cryptd iwlwifi pcspkr evdev mac_hid snd_hda_intel psmouse serio_raw snd_hda_contro ller snd_hda_codec snd_hwdep mxm_wmi snd_pcm ttm snd_timer cfg80211 snd lpc_ich soundcore mfd_core i2c_i801 fan int3403_thermal button i2c_algo_bit mei_me drm_k ms_helper mei drm battery tpm_tis 3 Feb 02 00:06:44 stroemsoe kernel: thermal tpm shpchp ac int3402_thermal i2c_core intel_gtt int3400_thermal acpi_thermal_rel processor sch_fq_codel overlay ext4 crc16 mbcache jbd2 sd_mod atkbd libps2 ahci libahci libata ehci_pci xhci_pci ehci_hcd xhci_hcd scsi_mod usbcore usb_common i8042 serio asus_nb_wmi asus_wmi hwm on video rfkill sparse_keymap wmi led_class 4 Feb 02 00:06:44 stroemsoe kernel: CPU: 0 PID: 273 Comm: irq/32-i915 Tainted: G W 3.19.0-1-mainline #1 5 Feb 02 00:06:44 stroemsoe kernel: Hardware name: ASUSTeK COMPUTER INC. UX32VD/UX32VD, BIOS UX32VD.213 11/16/2012 6 Feb 02 00:06:44 stroemsoe kernel: 0000000000000000 00000000b983161a ffff8800c88afc78 ffffffff8153537c 7 Feb 02 00:06:44 stroemsoe kernel: 0000000000000000 ffff8800c88afcd0 ffff8800c88afcb8 ffffffff81075a9a 8 Feb 02 00:06:44 stroemsoe kernel: ffff8800c88afcb8 ffff8800c7d99000 ffff8800c8e05000 ffff8800c8e05000 9 Feb 02 00:06:44 stroemsoe kernel: Call Trace: 10 Feb 02 00:06:44 stroemsoe kernel: [<ffffffff8153537c>] dump_stack+0x4c/0x6e 11 Feb 02 00:06:44 stroemsoe kernel: [<ffffffff81075a9a>] warn_slowpath_common+0x8a/0xc0 12 Feb 02 00:06:44 stroemsoe kernel: [<ffffffff81075b25>] warn_slowpath_fmt+0x55/0x70 13 Feb 02 00:06:44 stroemsoe kernel: [<ffffffffa0596492>] intel_check_page_flip+0xa2/0xf0 [i915] 14 Feb 02 00:06:44 stroemsoe kernel: [<ffffffffa05639d8>] ironlake_irq_handler+0x428/0x1000 [i915] 15 Feb 02 00:06:44 stroemsoe kernel: [<ffffffff810a17aa>] ? do_set_cpus_allowed+0x4a/0x60 16 Feb 02 00:06:44 stroemsoe kernel: [<ffffffff810cf810>] ? irq_thread_fn+0x50/0x50 17 Feb 02 00:06:44 stroemsoe kernel: [<ffffffff810cf83d>] irq_forced_thread_fn+0x2d/0x70 18 Feb 02 00:06:44 stroemsoe kernel: [<ffffffff810cfb67>] irq_thread+0x157/0x180 19 Feb 02 00:06:44 stroemsoe kernel: [<ffffffff810cf950>] ? wake_threads_waitq+0x30/0x30 20 Feb 02 00:06:44 stroemsoe kernel: [<ffffffff810cfa10>] ? irq_thread_dtor+0xc0/0xc0 21 Feb 02 00:06:44 stroemsoe kernel: [<ffffffff81093dea>] kthread+0xea/0x100 22 Feb 02 00:06:44 stroemsoe kernel: [<ffffffff81093d00>] ? kthread_create_on_node+0x1c0/0x1c0 23 Feb 02 00:06:44 stroemsoe kernel: [<ffffffff8153ac3c>] ret_from_fork+0x7c/0xb0 24 Feb 02 00:06:44 stroemsoe kernel: [<ffffffff81093d00>] ? kthread_create_on_node+0x1c0/0x1c0 25 Feb 02 00:06:44 stroemsoe kernel: ---[ end trace 46f2548918f46443 ]---
I get about 4-5 of them per second as long as compton is running. Starting compton with `--backend xrender` doesn't cause any warnings. I'm using the SNA AccelMethod (the default), but switching to UXA or Glamor didn't seem to have any effect. I haven't set any i915 specific kernel flags.
I don't see this on the current stable 3.18.5 kernel. The first time I saw this was on 3.19rc3 when I tried it due to another bug in the 3.18 series. I haven't gone through all the 3.19 release candidates, but the behaviour with 3.19rc6 seems identical to what I saw with 3.19rc3.
Sakari Kapanen