Date: Mon, 04 Apr 2022 11:17:16 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 263032] backlight(8) can't query the device Message-ID: <bug-263032-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D263032 Bug ID: 263032 Summary: backlight(8) can't query the device Product: Base System Version: 13.0-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: artur.brzozowski@protonmail.com Created attachment 232927 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D232927&action= =3Dedit <pciconf/kldstat/sysctl/dmesg> details On a FreeBSD 13.0-RELEASE-p8 installation, backlight(8) does not work despi= te proper initialisation of the backlight device. Hardware affected: vendor =3D 'Advanced Micro Devices, Inc. [AMD/ATI]' device =3D 'RV730/M96 [Mobility Radeon HD 4650/5165]' Available backlight device: crw-rw---- 1 root video 0x1f3 4 Apr. 10:22 backlight0 lrwxr-xr-x 1 root wheel 23 4 Apr. 10:22 radeon_bl00@ -> ../backlight/backlight0 Use of backlight(8) as non-root user (video group): backlight: Cannot query the backlight device Use of backlight(8) as root: backlight: Cannot update the backlight device (subsequent uses by a non-root also report the failure to update, not query, the backlight device) Workaround: loading 'acpi_video' module and using sysctl(8) to manipulate 'hw.acpi.video.lcd0.brightness'. Two other laptops with Intel chips do not have this problem. --=20 You are receiving this mail because: You are the assignee for the bug.=
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