From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org Subject: [Bug 110407] New: /sys/class/backlight/nv_backlight doesn't work on Dell Precision 7530 GP107GLM [Quadro P1000 Mobile] Date: Fri, 12 Apr 2019 05:56:55 +0000 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1563224148==" Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: nouveau-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Sender: "Nouveau" To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org List-Id: nouveau.vger.kernel.org --===============1563224148== Content-Type: multipart/alternative; boundary="15550486152.0dEaea6.8733" Content-Transfer-Encoding: 7bit --15550486152.0dEaea6.8733 Date: Fri, 12 Apr 2019 05:56:55 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated https://bugs.freedesktop.org/show_bug.cgi?id=3D110407 Bug ID: 110407 Summary: /sys/class/backlight/nv_backlight doesn't work on Dell Precision 7530 GP107GLM [Quadro P1000 Mobile] Product: xorg Version: unspecified Hardware: Other OS: All Status: NEW Severity: normal Priority: medium Component: Driver/nouveau Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Reporter: kai.heng.feng-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org This laptop has an BIOS option "Switchable Graphics". When the options is selected, it behaves like a normal Optimus laptop. In this case, brightness sysfs works since it's driven by Intel graphics. When the options is deselected, the Intel graphics device disappears, Nvidi= a is the only graphics device. The issue happens in this case. Changing /sys/class/backlight/nv_backlight/brightness, the brightness level remains the same - almost no backlight. Using proprietary driver, brightness gets changed correctly by /sys/class/backlight/nvidia_0/brightness. No trace while using MMIOTRACE, under proprietary driver. --=20 You are receiving this mail because: You are the assignee for the bug.= --15550486152.0dEaea6.8733 Date: Fri, 12 Apr 2019 05:56:55 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated
Bug ID 110407
Summary /sys/class/backlight/nv_backlight doesn't work on Dell Precis= ion 7530 GP107GLM [Quadro P1000 Mobile]
Product xorg
Version unspecified
Hardware Other
OS All
Status NEW
Severity normal
Priority medium
Component Driver/nouveau
Assignee nouveau@lists.freedesktop.org
Reporter kai.heng.feng@canonical.com
QA Contact xorg-team@lists.x.org 

This laptop has an BIOS option "Switchable Graphics"=
. When the options is
selected, it behaves like a normal Optimus laptop. In this case, brightness
sysfs works since it's driven by Intel graphics.

When the options is deselected, the Intel graphics device disappears, Nvidi=
a is
the only graphics device. The issue happens in this case.

Changing /sys/class/backlight/nv_backlight/brightness, the brightness level
remains the same - almost no backlight.

Using proprietary driver, brightness gets changed correctly by
/sys/class/backlight/nvidia_0/brightness.

No trace while using MMIOTRACE, under proprietary driver.

You are receiving this mail because:
  • You are the assignee for the bug.
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