On 03/16/2016, 10:36 PM, Michal Kubecek wrote:
On Wed, Mar 16, 2016 at 06:50:35PM +0100, Martin Konold wrote:
Hi,
when upgrading to the most recent kernel from http://ftp5.gwdg.de/pub/ opensuse/update/13.1/src/kernel-source-3.12.53-40.1.src.rpm and http:// ftp5.gwdg.de/pub/opensuse/update/13.1/nosrc/kernel-desktop-3.12.53-40.1.nosrc.rpm on OpenSUSE 13.1 I observe the following warning from i915 driver:
Mär 16 09:35:12 rt-ccs7520 kernel: ------------[ cut here ]------------ Mär 16 09:35:12 rt-ccs7520 kernel: WARNING: CPU: 0 PID: 90 at ../drivers/gpu/ drm/i915/intel_panel.c:632 i9xx_enable_backlight+0xdc/0x100 [i915]() Mär 16 09:35:12 rt-ccs7520 kernel: backlight already enabled Mär 16 09:35:12 rt-ccs7520 kernel: Modules linked in: i2c_i801(+) lpc_ich(+) ata_piix(+) mfd_core tg3 libphy ptp i915(+) pps_core drm_kms_helper drm i2c_algo_bit shpchp button video processor thermal_sys Mär 16 09:35:12 rt-ccs7520 kernel: CPU: 0 PID: 90 Comm: udevd Not tainted 3.12.53-40.2-ccs #1 Mär 16 09:35:12 rt-ccs7520 kernel: Hardware name: National Instruments NI PXI-8190 Series Embedded Controller /NI PXI-8190 Series Embedded Controller , BIOS 1.3.2 03/24/2011 Mär 16 09:35:12 rt-ccs7520 kernel: f7d25318 c074fb28 00000000 c0247088 f7d2c021 f6cab85c 0000005a f7d25318 Mär 16 09:35:12 rt-ccs7520 kernel: 00000278 f7cf545c f7cf545c f6d08000 f6d5c000 f6d02000 00000292 c02470f3 Mär 16 09:35:12 rt-ccs7520 kernel: 00000009 f6cab844 f7d2c021 f6cab85c f7cf545c f7d25318 00000278 f7d2c021 Mär 16 09:35:12 rt-ccs7520 kernel: Call Trace: Mär 16 09:35:12 rt-ccs7520 kernel: [<c0205209>] try_stack_unwind+0x179/0x190 Mär 16 09:35:12 rt-ccs7520 kernel: [<c02041d7>] dump_trace+0x47/0xf0 Mär 16 09:35:12 rt-ccs7520 kernel: [<c020525f>] show_trace_log_lvl+0x3f/0x50 Mär 16 09:35:12 rt-ccs7520 kernel: [<c02042d0>] show_stack_log_lvl+0x50/0xd0 Mär 16 09:35:12 rt-ccs7520 kernel: [<c02052af>] show_stack+0x1f/0x40 Mär 16 09:35:12 rt-ccs7520 kernel: [<c074fb28>] dump_stack+0x48/0x76 Mär 16 09:35:12 rt-ccs7520 kernel: [<c0247088>] warn_slowpath_common +0x88/0xc0 Mär 16 09:35:12 rt-ccs7520 kernel: [<c02470f3>] warn_slowpath_fmt+0x33/0x40 Mär 16 09:35:12 rt-ccs7520 kernel: [<f7cf545c>] i9xx_enable_backlight+0xdc/ 0x100 [i915] Mär 16 09:35:12 rt-ccs7520 kernel: [<f7cf655c>] intel_panel_enable_backlight ...
I did a quick search and it looks like we may need commit
813008cd3e93 ("drm/i915: don't warn if backlight unexpectedly enabled")
Please open a bug in bugzilla for this issue.
And note there, if you see some bad behavior or only the warning with no visible effects. thanks, -- js suse labs -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-kernel+owner@opensuse.org