Date: Mon, 30 Jan 2023 21:52:40 -1000 From: "parv/FreeBSD" <parv.0zero9+freebsd@gmail.com> To: freebsd-current@freebsd.org Subject: Could not change brightness anymore with i915kms & acpi_video modules c 202211 Message-ID: <CABObuOoUDHrUF6FyTwEXTrnt3ztkoAR4x5vzjcNp7H-4F4XE7A@mail.gmail.com>
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Hi there,
Since around 2022-11, I am unable to change display brightness
of the display of a Framework laptop (Intel i5-1135G7, Iris
Xe iGPU) with "i915kms" module (from "drm-510-kmod" package/port)
& "acpi_video" (FreeBSD) kernel module.
Earlier I was able to change brightness via "hw.acpi.video" MIB ...
# - Need to have both "i915kms" & "acpi_video" modules already loaded.
#
# 20221120 - These MIBs do not work anymore as they are missing.
hw.acpi.video.lcd0.economy=10
hw.acpi.video.lcd0.fullpower=40
hw.acpi.video.lcd0.brightness=15
... now the whole of "hw.acpi.video" stub is missing. Nothing has
changed in terms of how/when "i915kms" & "acpi_video" are loaded (via
"kld_list" variable via "/etc/rc.conf" in that order).
What am I missing?
- parv
## /etc/rc.conf :
clear_tmp_enable="YES"
sendmail_enable="NONE"
sshd_enable="YES"
zfs_enable="YES"
dumpdev="AUTO"
hostname="luna"
devmatch_blacklist="ng_ubt"
devmatch_blacklist="$devmatch_blacklist if_iwlwifi"
moused_enable="YES"
kld_list="filemon"
# As of 20220316 on 14-CURRENT order of values assigned to a variable
matters
# enough that assigning "acpi_video" after "i915kms" is sufficient.
#
# WARNING - After loading 'acpi_video' module, brightness suddenly increases
# blindingly.
#
# XXX: If i915kms does not load properly on boot, say after world install,
will
# see a blank screen & Ctrl-Alt-{Delete,Backspace,Escape} do not seem
to
# work; need a hard reboot.
#
# 20230120 - Since around 2022-11 or 2022-12, order has no effect on
brightness.
kld_list="$kld_list i915kms"
kld_list="$kld_list acpi_video"
# Attemp to maximize battery life.
power_profile='economy'
economy_cx_lowest='Cmax'
performance_cx_lowest='C2'
wifibox_enable="YES"
defaultrouter="10.0.0.1"
defaultroot_delay="10"
ifconfig_wifibox0="SYNCDHCP"
background_dhclient_wifibox0="YES"
ntpd_enable="YES"
ntpd_flags="-G"
dbus_enable="YES"
smartd_enable="YES"
## /etc/sysctl.conf :
kern.randompid=1
vfs.usermount=1
kern.vt.kbd_halt=1
kern.vt.kbd_poweroff=1
kern.vt.kbd_reboot=1
kern.vt.kbd_debug=1
kern.vt.kbd_panic=1
vfs.zfs.arc.max=30064771072
dev.hwpstate_intel.0.epp=70
dev.hwpstate_intel.1.epp=70
dev.hwpstate_intel.2.epp=100
dev.hwpstate_intel.3.epp=100
dev.hwpstate_intel.4.epp=100
dev.hwpstate_intel.5.epp=100
dev.hwpstate_intel.6.epp=100
dev.hwpstate_intel.7.epp=100
kern.timecounter.hardware='HPET'
hw.acpi.lid_switch_state='S5'
hw.acpi.sleep_button_state='S5'
# 'acpi_video' module needs to be loaded after 'i915kms' module to have LCD
# brightness related MIBs -- hw.acpi.lcd0.* -- to have any effect. This has
# been an issue since 2014, see PR 195116,
# <https://bugs.freebsd.org/bugzilla/show_bug_cgi?id=195116>.
#
# As of 20220316 on 14-CURRENT order of values assigned to a variable
matters
# enough that assigning "acpi_video" after "i915kms" to "$kld_list" in
# "/etc/rc.conf" is sufficient.
#
# WARNING - After loading 'acpi_video' module, brightness suddenly increases
# blindinly.
#
# Default of 50 for 'hw.acpi.video.lcd0.brightness' rather too bright; 100
is
# blinding.
# - Need to have both "i915kms" & "acpi_video" modules already loaded.
#
# 20221120 - These MIBs do not work anymore as they are missing.
#hw.acpi.video.lcd0.economy=10
#hw.acpi.video.lcd0.fullpower=40
#hw.acpi.video.lcd0.brightness=15
# Power management with "i915kms" module from "drm-devel-kmod" (14-CURRENT)
# package.
# - only in "/boot/loader.conf" ...
#
# compat.linuxkpi.i915_enable_dc=2
# compat.linuxkpi.i915_disable_power_well=<-1|0|1>
#
# ... that means need to load i915kms in "/boot/loader.conf" too.?
#
compat.linuxkpi.i915_fastboot=1
compat.linuxkpi.i915_enable_fbc=1
## /boot/loader.conf :
cryptodev_load="YES"
zfs_load="YES"
kern.msgbufsize=1146880
ums_load="YES"
hms_load="YES"
hw.vga.textmode=0
kern.vty=vt
# Need to load after i915kms module to have effect; so is loaded via
# /etc/rc.conf instead by adding it to $kld_list after "i915kms" as in
# 'kld_list="i915kms acpi_video"'.
#acpi_video_load="YES"
machdep.hwpstate_pkg_ctrl=0
coretemp_load="YES"
## From "/etc/rc.conf" ...
# Power management with "i915kms" module from "drm-devel-kmod" (14-CURRENT)
# package.
# - only in "/boot/loader.conf" ...
#
# compat.linuxkpi.i915_enable_dc=2
# compat.linuxkpi.i915_disable_power_well=<-1|0|1>
#
# ... that means need to load i915kms in "/boot/loader.conf" too.?
#
#compat.linuxkpi.i915_fastboot=1
#compat.linuxkpi.i915_enable_fbc=1
hw.pci.do_power_nodriver=2
--000000000000521dde05f38aa1de
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:monospac=
e">Hi there,</div><div class=3D"gmail_default" style=3D"font-family:monospa=
ce"><br></div><div class=3D"gmail_default" style=3D"font-family:monospace">=
Since around 2022-11, I am unable to change display brightness</div><div cl=
ass=3D"gmail_default" style=3D"font-family:monospace">of the display of a F=
ramework laptop (Intel i5-1135G7, Iris</div><div class=3D"gmail_default" st=
yle=3D"font-family:monospace">Xe iGPU) with "i915kms" module (fro=
m "drm-510-kmod" package/port)</div><div class=3D"gmail_default" =
style=3D"font-family:monospace">& "acpi_video" (FreeBSD) kern=
el module.</div><div class=3D"gmail_default" style=3D"font-family:monospace=
"><br></div><div class=3D"gmail_default" style=3D"font-family:monospace">Ea=
rlier I was able to change brightness via "hw.acpi.video" MIB ...=
</div><div class=3D"gmail_default" style=3D"font-family:monospace"><br></di=
v><div class=3D"gmail_default" style=3D"font-family:monospace"># - Need to =
have both "i915kms" & "acpi_video" modules already =
loaded.<br>#<br># 20221120 - These MIBs do not work anymore as they are mis=
sing.<br>hw.acpi.video.lcd0.economy=3D10<br>hw.acpi.video.lcd0.fullpower=3D=
40<br>hw.acpi.video.lcd0.brightness=3D15</div><div class=3D"gmail_default" =
style=3D"font-family:monospace"><br></div><div class=3D"gmail_default" styl=
e=3D"font-family:monospace"><br></div><div class=3D"gmail_default" style=3D=
"font-family:monospace">... now the whole of "hw.acpi.video" stub=
is missing. Nothing has</div><div class=3D"gmail_default" style=3D"font-fa=
mily:monospace">changed in terms of how/when "i915kms" & &quo=
t;acpi_video" are loaded (via</div><div class=3D"gmail_default" style=
=3D"font-family:monospace">"kld_list" variable via "/etc/rc.=
conf" in that order).<br></div><br><div class=3D"gmail_default" style=
=3D"font-family:monospace">What am I missing?</div><div class=3D"gmail_defa=
ult" style=3D"font-family:monospace"><br></div><div class=3D"gmail_default"=
style=3D"font-family:monospace"><br></div><div class=3D"gmail_default" sty=
le=3D"font-family:monospace">- parv</div><div class=3D"gmail_default" style=
=3D"font-family:monospace"><br></div><div class=3D"gmail_default" style=3D"=
font-family:monospace"><br></div><div class=3D"gmail_default" style=3D"font=
-family:monospace">## /etc/rc.conf :<br></div><div class=3D"gmail_default" =
style=3D"font-family:monospace">clear_tmp_enable=3D"YES"<br>sendm=
ail_enable=3D"NONE"<br>sshd_enable=3D"YES"<br>zfs_enabl=
e=3D"YES"<br>dumpdev=3D"AUTO"<br><br>hostname=3D"l=
una"<br><br>devmatch_blacklist=3D"ng_ubt"<br>devmatch_blackl=
ist=3D"$devmatch_blacklist if_iwlwifi"<br><br>moused_enable=3D&qu=
ot;YES"<br><br>kld_list=3D"filemon"<br><br># As of 20220316 =
on 14-CURRENT order of values assigned to a variable matters<br># enough th=
at assigning "acpi_video" after "i915kms" is sufficient=
.<br>#<br># WARNING - After loading 'acpi_video' module, brightness=
suddenly increases<br># blindingly.<br>#<br># XXX: If i915kms does not loa=
d properly on boot, say after world install, will<br># =C2=A0 =C2=A0 =C2=A0=
see a blank screen & Ctrl-Alt-{Delete,Backspace,Escape} do not seem to<=
br># =C2=A0 =C2=A0 =C2=A0work; need a hard reboot.<br>#<br># 20230120 - Sin=
ce around 2022-11 or 2022-12, order has no effect on brightness.<br>kld_lis=
t=3D"$kld_list i915kms"<br>kld_list=3D"$kld_list acpi_video&=
quot;<br><br># Attemp to maximize battery life.<br>power_profile=3D'eco=
nomy'<br>economy_cx_lowest=3D'Cmax'<br>performance_cx_lowest=3D=
'C2'<br><br>wifibox_enable=3D"YES"<br>defaultrouter=3D&qu=
ot;10.0.0.1"<br>defaultroot_delay=3D"10"<br>ifconfig_wifibox=
0=3D"SYNCDHCP"<br>background_dhclient_wifibox0=3D"YES"<=
br><br>ntpd_enable=3D"YES"</div><div class=3D"gmail_default" styl=
e=3D"font-family:monospace">ntpd_flags=3D"-G"<br>dbus_enable=3D&q=
uot;YES"<br>smartd_enable=3D"YES"</div><div class=3D"gmail_d=
efault" style=3D"font-family:monospace"><br></div><div class=3D"gmail_defau=
lt" style=3D"font-family:monospace">## /etc/sysctl.conf :</div><div class=
=3D"gmail_default" style=3D"font-family:monospace">kern.randompid=3D1<br>vf=
s.usermount=3D1<br><br>kern.vt.kbd_halt=3D1<br>kern.vt.kbd_poweroff=3D1<br>=
kern.vt.kbd_reboot=3D1<br>kern.vt.kbd_debug=3D1<br>kern.vt.kbd_panic=3D1<br=
><br>vfs.zfs.arc.max=3D30064771072<br><br>dev.hwpstate_intel.0.epp=3D70<br>=
dev.hwpstate_intel.1.epp=3D70<br>dev.hwpstate_intel.2.epp=3D100<br>dev.hwps=
tate_intel.3.epp=3D100<br>dev.hwpstate_intel.4.epp=3D100<br>dev.hwpstate_in=
tel.5.epp=3D100<br>dev.hwpstate_intel.6.epp=3D100<br>dev.hwpstate_intel.7.e=
pp=3D100<br><br>kern.timecounter.hardware=3D'HPET'<br><br>hw.acpi.l=
id_switch_state=3D'S5'<br>hw.acpi.sleep_button_state=3D'S5'=
<br><br># 'acpi_video' module needs to be loaded after 'i915kms=
' module to have LCD<br># brightness related MIBs -- hw.acpi.lcd0.* -- =
to have any effect. This has<br># been an issue since 2014, see PR 195116,<=
br># <<a href=3D"https://bugs.freebsd.org/bugzilla/show_bug_cgi?id=3D195=
116">https://bugs.freebsd.org/bugzilla/show_bug_cgi?id=3D195116</a>>.<br=
>#<br># As of 20220316 on 14-CURRENT order of values assigned to a variable=
matters<br># enough that assigning "acpi_video" after "i915=
kms" to "$kld_list" in<br># "/etc/rc.conf" is suff=
icient.<br>#<br># WARNING - After loading 'acpi_video' module, brig=
htness suddenly increases<br># blindinly.<br>#<br># Default of 50 for '=
hw.acpi.video.lcd0.brightness' rather too bright; 100 is<br># blinding.=
<br># - Need to have both "i915kms" & "acpi_video" =
modules already loaded.<br>#<br># 20221120 - These MIBs do not work anymore=
as they are missing.<br>#hw.acpi.video.lcd0.economy=3D10<br>#hw.acpi.video=
.lcd0.fullpower=3D40<br>#hw.acpi.video.lcd0.brightness=3D15</div><div class=
=3D"gmail_default" style=3D"font-family:monospace"><br></div><div class=3D"=
gmail_default" style=3D"font-family:monospace"># Power management with &quo=
t;i915kms" module from "drm-devel-kmod" (14-CURRENT)<br># pa=
ckage.<br># - only in "/boot/loader.conf" ...<br>#<br># =C2=A0 =
=C2=A0 compat.linuxkpi.i915_enable_dc=3D2<br># =C2=A0 =C2=A0 compat.linuxkp=
i.i915_disable_power_well=3D<-1|0|1><br>#<br># =C2=A0... that means n=
eed to load i915kms in "/boot/loader.conf" too.?<br>#<br>compat.l=
inuxkpi.i915_fastboot=3D1<br>compat.linuxkpi.i915_enable_fbc=3D1</div><div =
class=3D"gmail_default" style=3D"font-family:monospace"><br></div><div clas=
s=3D"gmail_default" style=3D"font-family:monospace">## /boot/loader.conf :<=
/div><div class=3D"gmail_default" style=3D"font-family:monospace">cryptodev=
_load=3D"YES"<br>zfs_load=3D"YES"<br><br>kern.msgbufsiz=
e=3D1146880<br><br>ums_load=3D"YES"<br>hms_load=3D"YES"=
<br><br>hw.vga.textmode=3D0<br>kern.vty=3Dvt<br><br># Need to load after i9=
15kms module to have effect; so is loaded via<br># /etc/rc.conf instead by =
adding it to $kld_list after "i915kms" as in<br># 'kld_list=
=3D"i915kms acpi_video"'.<br>#acpi_video_load=3D"YES&quo=
t;<br><br>machdep.hwpstate_pkg_ctrl=3D0<br>coretemp_load=3D"YES"<=
br><br>## From "/etc/rc.conf" ...<br># Power management with &quo=
t;i915kms" module from "drm-devel-kmod" (14-CURRENT)<br># pa=
ckage.<br># - only in "/boot/loader.conf" ...<br>#<br># =C2=A0 =
=C2=A0 compat.linuxkpi.i915_enable_dc=3D2<br># =C2=A0 =C2=A0 compat.linuxkp=
i.i915_disable_power_well=3D<-1|0|1><br>#<br># =C2=A0... that means n=
eed to load i915kms in "/boot/loader.conf" too.?<br>#<br>#compat.=
linuxkpi.i915_fastboot=3D1<br>#compat.linuxkpi.i915_enable_fbc=3D1<br><br>h=
w.pci.do_power_nodriver=3D2</div><div class=3D"gmail_default" style=3D"font=
-family:monospace"><br></div></div>
--000000000000521dde05f38aa1de--
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