[Intel-gfx] WARNING on i915 - intel_panel

[Pedro Ribeiro]

On 26 May 2014 10:22, Jani Nikula <jani.nikula at linux.intel.com> wrote:
> On Sat, 24 May 2014, Pedro Ribeiro <pedrib at gmail.com> wrote:
>> Hi,
>>
>> I'm getting this error consistently with the Debian 3.14.4 after
>> resuming from hibernation:
>
> Does this ever happen on a fresh boot or when resuming from suspend to
> ram?
>
> BR,
> Jani.
>

Hi Jani,

it seems to happen only on resume from disk (after waking up from
hibernation, not suspend to ram), and only from the 2nd resume
forward. It doesn't happen on fresh boot.

Regards,
Pedro

>>
>> [  931.032142] ------------[ cut here ]------------
>> [  931.032209] WARNING: CPU: 0 PID: 4715 at
>> /build/linux-Zc5oK7/linux-3.14.4/drivers/gpu/drm/i915/intel_panel.c:723
>> i965_enable_backlight+0x122/0x150 [i915]()
>> [  931.032219] backlight already enabled
>> [  931.032223] Modules linked in: ctr ccm cpufreq_stats
>> cpufreq_userspace cpufreq_conservative cpufreq_powersave pci_stub
>> vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) binfmt_misc
>> nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables xt_tcpudp
>> xt_conntrack iptable_filter iptable_nat nf_conntrack_ipv4
>> nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ip_tables x_tables fuse
>> vmwgfx ttm vmxnet3 tp_smapi(O) thinkpad_ec(O) loop ppdev lp btusb
>> bluetooth 6lowpan_iphc crc16 snd_hda_codec_conexant
>> snd_hda_codec_generic coretemp kvm_intel uvcvideo kvm
>> videobuf2_vmalloc videobuf2_memops videobuf2_core videodev media
>> psmouse serio_raw arc4 evdev iwldvm snd_hda_intel snd_hda_codec
>> snd_hwdep snd_pcm_oss thinkpad_acpi mac80211 snd_mixer_oss nvram
>> snd_pcm snd_seq_midi i2c_i801 snd_seq_midi_event lpc_ich snd_rawmidi
>> mfd_core snd_seq snd_seq_device snd_timer iwlwifi cfg80211 snd wmi
>> soundcore rfkill battery ac parport_pc tpm_tis parport i915 tpm video
>> drm_kms_helper drm i2c_algo_bit i2c_core acpi_cpufreq mei_me mei
>> processor button xfs crc32c libcrc32c lzo sg hid_generic usbhid hid
>> sd_mod crct10dif_generic sr_mod crc_t10dif cdrom crct10dif_common
>> firewire_ohci firewire_core crc_itu_t ahci libahci libata scsi_mod
>> thermal thermal_sys uhci_hcd ehci_pci ehci_hcd usbcore usb_common
>> e1000e ptp pps_core
>> [  931.032448] CPU: 0 PID: 4715 Comm: kworker/u8:89 Tainted: G
>>   O 3.14-1-amd64 #1 Debian 3.14.4-1
>> [  931.032456] Hardware name: LENOVO 7417PLU/7417PLU, BIOS 7VET95WW
>> (3.25 ) 10/10/2012
>> [  931.032470] Workqueue: events_unbound async_run_entry_fn
>> [  931.032476]  0000000000000009 ffffffff814b9b42 ffff8800a6369af8
>> ffffffff8105f0a2
>> [  931.032488]  ffff880232b04000 ffff8800a6369b48 ffff8802301ac000
>> 00000000e0000000
>> [  931.032498]  ffff8800b870d000 ffffffff8105f107 ffffffffa0392f9b
>> ffffffff00000018
>> [  931.032508] Call Trace:
>> [  931.032522]  [<ffffffff814b9b42>] ? dump_stack+0x41/0x51
>> [  931.032532]  [<ffffffff8105f0a2>] ? warn_slowpath_common+0x72/0x90
>> [  931.032541]  [<ffffffff8105f107>] ? warn_slowpath_fmt+0x47/0x50
>> [  931.032576]  [<ffffffffa0366782>] ? gen4_read32+0x32/0xa0 [i915]
>> [  931.032609]  [<ffffffffa034f2f2>] ? i965_enable_backlight+0x122/0x150 [i915]
>> [  931.032644]  [<ffffffffa035025c>] ?
>> intel_panel_enable_backlight+0x9c/0xe0 [i915]
>> [  931.032676]  [<ffffffffa03663c0>] ? gen4_write64+0x90/0x90 [i915]
>> [  931.032709]  [<ffffffffa0330181>] ? i9xx_crtc_enable+0x2e1/0x400 [i915]
>> [  931.032743]  [<ffffffffa03329ee>] ? __intel_set_mode+0x85e/0x15a0 [i915]
>> [  931.032779]  [<ffffffffa0338c49>] ?
>> intel_modeset_setup_hw_state+0xb09/0xc10 [i915]
>> [  931.032808]  [<ffffffffa02fd2ca>] ? __i915_drm_thaw+0x15a/0x210 [i915]
>> [  931.032834]  [<ffffffffa02fd3d1>] ? i915_resume+0x51/0x70 [i915]
>> [  931.032844]  [<ffffffff812b0da0>] ? pci_pm_suspend_noirq+0x190/0x190
>> [  931.032854]  [<ffffffff8136cd8e>] ? dpm_run_callback+0x2e/0x70
>> [  931.032862]  [<ffffffff8136ce9c>] ? device_resume+0x8c/0x180
>> [  931.032870]  [<ffffffff8136cfa4>] ? async_resume+0x14/0x40
>> [  931.032880]  [<ffffffff8108503d>] ? async_run_entry_fn+0x2d/0x120
>> [  931.032890]  [<ffffffff81078b9d>] ? process_one_work+0x16d/0x420
>> [  931.032899]  [<ffffffff81079756>] ? worker_thread+0x116/0x3b0
>> [  931.032908]  [<ffffffff81079640>] ? rescuer_thread+0x330/0x330
>> [  931.032917]  [<ffffffff8107f911>] ? kthread+0xc1/0xe0
>> [  931.032925]  [<ffffffff8107f850>] ? kthread_create_on_node+0x180/0x180
>> [  931.032934]  [<ffffffff814c73cc>] ? ret_from_fork+0x7c/0xb0
>> [  931.032943]  [<ffffffff8107f850>] ? kthread_create_on_node+0x180/0x180
>> [  931.032950] ---[ end trace a83af26b25b25474 ]---
>>
>> My hardware is a Lenovo T400 with a GM45.
>>
>> Does this mean anything to you? Please let me know if there is
>> anything else you need.
>>
>> Regards,
>> Pedro
>> _______________________________________________
>> Intel-gfx mailing list
>> Intel-gfx at lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
> --
> Jani Nikula, Intel Open Source Technology Center