[Bug 80930] [regression] WARNING ... i965_enable_backlight ... backlight already enabled
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Sun Jul 20 04:10:11 PDT 2014
https://bugs.freedesktop.org/show_bug.cgi?id=80930
--- Comment #4 from Peter Klotz <peter.klotz99 at gmail.com> ---
Starting with Linux 3.14 I obtain a backtrace very similar to the one in the
original bug comment every time the machine is booted up.
The backtrace produced by current kernel 3.15.6:
[ 13.813399] ------------[ cut here ]------------
[ 13.813446] WARNING: CPU: 0 PID: 253 at
drivers/gpu/drm/i915/intel_panel.c:714 i965_enable_backlight+0x12a/0x150
[i915]()
[ 13.813446] backlight already enabled
[ 13.813485] Modules linked in: ppdev mousedev joydev uvcvideo
videobuf2_vmalloc videobuf2_memops videobuf2_core uas videodev media btusb
bluetooth coretemp 6lowpan_iphc hwmon kvm_intel kvm arc4 microcode iwldvm evdev
mac80211 mac_hid serio_raw psmouse pcspkr iwlwifi lpc_ich(+) i915(+)
snd_hda_codec_hdmi cfg80211 r852 sm_common r592 nand nand_ecc nand_ids mtd
memstick snd_hda_codec_realtek snd_hda_codec_generic drm_kms_helper r8169 mii
snd_hda_intel snd_hda_controller thermal tpm_tis parport_pc tpm drm parport
asus_laptop battery ac snd_hda_codec video sparse_keymap rfkill input_polldev
snd_hwdep snd_pcm snd_timer intel_agp shpchp snd acpi_cpufreq intel_gtt
i2c_algo_bit i2c_core soundcore button processor fuse vboxnetflt(O) vboxdrv(O)
ext4 crc16 mbcache jbd2 sha256_ssse3 sha256_generic ecb cbc algif_skcipher
[ 13.813501] af_alg dm_crypt dm_mod sr_mod cdrom sd_mod crct10dif_generic
crc_t10dif crct10dif_common hid_generic hid_cherry usbhid hid usb_storage atkbd
libps2 sdhci_pci sdhci led_class mmc_core ahci libahci firewire_ohci
firewire_core crc_itu_t sata_sil24 libata scsi_mod ehci_pci uhci_hcd ehci_hcd
usbcore usb_common i8042 serio
[ 13.813504] CPU: 0 PID: 253 Comm: systemd-udevd Tainted: G O
3.15.6-1-ARCH #1
[ 13.813505] Hardware name: ASUSTeK Computer Inc. B50A
/B50A , BIOS 212 10/09/2009
[ 13.813508] 0000000000000000 0000000040a78d7d ffff880232f6f250
ffffffff8150848e
[ 13.813509] ffff880232f6f298 ffff880232f6f288 ffffffff81069b2d
ffff8802337dc000
[ 13.813511] 0000000000000000 ffff880232f3a800 00000000e0000000
ffff8800b92d7e00
[ 13.813511] Call Trace:
[ 13.813517] [<ffffffff8150848e>] dump_stack+0x4d/0x6f
[ 13.813520] [<ffffffff81069b2d>] warn_slowpath_common+0x7d/0xa0
[ 13.813522] [<ffffffff81069bac>] warn_slowpath_fmt+0x5c/0x80
[ 13.813544] [<ffffffffa06a495b>] ? gen4_read32+0x4b/0xd0 [i915]
[ 13.813567] [<ffffffffa06e1cea>] i965_enable_backlight+0x12a/0x150 [i915]
[ 13.813591] [<ffffffffa06e2d02>] intel_panel_enable_backlight+0x82/0xe0
[i915]
[ 13.813612] [<ffffffffa06a4c40>] ? gen4_write64+0xc0/0xc0 [i915]
[ 13.813635] [<ffffffffa06e0a9b>] intel_enable_lvds+0x16b/0x180 [i915]
[ 13.813656] [<ffffffffa06a4c40>] ? gen4_write64+0xc0/0xc0 [i915]
[ 13.813678] [<ffffffffa06b9319>] i9xx_crtc_enable+0x2e9/0x420 [i915]
[ 13.813701] [<ffffffffa06bc03f>] __intel_set_mode+0x7ff/0x16b0 [i915]
[ 13.813724] [<ffffffffa06bf686>] intel_set_mode+0x16/0x30 [i915]
[ 13.813747] [<ffffffffa06c0740>] intel_crtc_set_config+0xa90/0xde0 [i915]
[ 13.813756] [<ffffffffa00dde71>] drm_mode_set_config_internal+0x61/0xf0
[drm]
[ 13.813760] [<ffffffffa01d2643>] drm_fb_helper_restore_fbdev_mode+0xb3/0xe0
[drm_kms_helper]
[ 13.813763] [<ffffffffa01d4871>] drm_fb_helper_set_par+0x31/0x80
[drm_kms_helper]
[ 13.813766] [<ffffffff812f2460>] fbcon_init+0x590/0x610
[ 13.813769] [<ffffffff81369b88>] visual_init+0xb8/0x120
[ 13.813771] [<ffffffff8136c086>] do_bind_con_driver+0x176/0x3f0
[ 13.813773] [<ffffffff8136c894>] do_take_over_console+0xb4/0x1b0
[ 13.813775] [<ffffffff812f2543>] do_fbcon_takeover+0x63/0xd0
[ 13.813776] [<ffffffff812f6bad>] fbcon_event_notify+0x6cd/0x7d0
[ 13.813779] [<ffffffff815117dd>] notifier_call_chain+0x4d/0x70
[ 13.813782] [<ffffffff81091fb7>] __blocking_notifier_call_chain+0x47/0x60
[ 13.813784] [<ffffffff81091fe6>] blocking_notifier_call_chain+0x16/0x20
[ 13.813786] [<ffffffff812fce4b>] fb_notifier_call_chain+0x1b/0x20
[ 13.813787] [<ffffffff812ff03e>] register_framebuffer+0x20e/0x360
[ 13.813791] [<ffffffffa01d465f>] drm_fb_helper_initial_config+0x35f/0x540
[drm_kms_helper]
[ 13.813812] [<ffffffffa06a4c8f>] ? gen4_write32+0x4f/0xd0 [i915]
[ 13.813840] [<ffffffffa06cb73f>] intel_fbdev_initial_config+0x1f/0x30
[i915]
[ 13.813870] [<ffffffffa06ecfa4>] i915_driver_load+0xf74/0xfd0 [i915]
[ 13.813873] [<ffffffff81296168>] ? kobject_uevent_env+0x178/0x690
[ 13.813876] [<ffffffff8138d107>] ? get_device+0x17/0x30
[ 13.813878] [<ffffffff81392d55>] ? klist_class_dev_get+0x15/0x20
[ 13.813881] [<ffffffff814fb5c8>] ? klist_node_init+0x38/0x60
[ 13.813883] [<ffffffff814fb686>] ? klist_add_tail+0x46/0x50
[ 13.813884] [<ffffffff8138e9eb>] ? device_add+0x1db/0x6d0
[ 13.813892] [<ffffffffa00db7c7>] ? drm_sysfs_device_add+0xd7/0x120 [drm]
[ 13.813898] [<ffffffffa00d7bcd>] drm_dev_register+0xad/0x100 [drm]
[ 13.813904] [<ffffffffa00da7a4>] drm_get_pci_dev+0xd4/0x220 [drm]
[ 13.813921] [<ffffffffa066960b>] i915_pci_probe+0x3b/0x60 [i915]
[ 13.813923] [<ffffffff812ceda5>] local_pci_probe+0x45/0xa0
[ 13.813924] [<ffffffff812ce4e5>] ? pci_match_device+0xc5/0xd0
[ 13.813926] [<ffffffff812cef01>] pci_device_probe+0x101/0x150
[ 13.813929] [<ffffffff81391f23>] driver_probe_device+0xa3/0x410
[ 13.813931] [<ffffffff8139235b>] __driver_attach+0x8b/0x90
[ 13.813933] [<ffffffff813922d0>] ? __device_attach+0x40/0x40
[ 13.813935] [<ffffffff8138fcc3>] bus_for_each_dev+0x73/0xc0
[ 13.813937] [<ffffffff8139195e>] driver_attach+0x1e/0x20
[ 13.813939] [<ffffffff81391510>] bus_add_driver+0x180/0x250
[ 13.813945] [<ffffffffa072d000>] ? 0xffffffffa072cfff
[ 13.813947] [<ffffffff81392a44>] driver_register+0x64/0xf0
[ 13.813950] [<ffffffffa072d000>] ? 0xffffffffa072cfff
[ 13.813951] [<ffffffff812ce64b>] __pci_register_driver+0x4b/0x50
[ 13.813957] [<ffffffffa00da9fa>] drm_pci_init+0x10a/0x140 [drm]
[ 13.813959] [<ffffffff81091fe6>] ? blocking_notifier_call_chain+0x16/0x20
[ 13.813962] [<ffffffffa072d000>] ? 0xffffffffa072cfff
[ 13.813981] [<ffffffffa072d06a>] i915_init+0x6a/0x6c [i915]
[ 13.813983] [<ffffffff81002162>] do_one_initcall+0xf2/0x1b0
[ 13.813985] [<ffffffff81091fc2>] ? __blocking_notifier_call_chain+0x52/0x60
[ 13.813989] [<ffffffff810e9b0e>] load_module+0x1e0e/0x2580
[ 13.813990] [<ffffffff810e6290>] ? store_uevent+0x70/0x70
[ 13.813993] [<ffffffff810ea34d>] SyS_init_module+0xcd/0x120
[ 13.813996] [<ffffffff81516229>] system_call_fastpath+0x16/0x1b
[ 13.813998] ---[ end trace 581ac8a9ff435241 ]---
Does it look like the same underlying problem or should I report another bug?
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