Fedora 15 on NVIDIA NVS 3100M

In an earlier post, I already wrote about how to install the proprietary video driver on Fedora. In a brief update I suggested to change the acpi_sleep kernel option to accomplish proper display wake-up from standby. Unfortunately, that solution doesn’t work reliably in my experience. Today I found a solution that seems to successfully work around the problem of the black screen by waking up the screen „manually“.

Gernot Walzl wrote a „nasty workaround“ (quoting himself) in the form of the following script:


# nvidia_dpms_fix.sh
# 2011-06-12
# by Gernot WALZL

# nasty workaround for nvidia drivers to resume from dpms off/suspend

export DISPLAY=:0

getXauthority () {
  export XAUTHORITY=$(ps -C X -f | grep "$DISPLAY" \
    | sed -n 's/.* -auth \([^ ]*\).*/\1/p')

handle_line () {
  if echo "$1" | grep -e "(EE) NVIDIA.* DisplayPort link training failed" \
      > /dev/null; then
    xset dpms force on

tail --follow=name /var/log/Xorg.0.log --retry --lines=1 2> /dev/null \
  | while read line; do
    handle_line "$line"

To actually make this do its job, I copied it into /usr/local/bin, made it executable and created an autostart entry for GNOME 3 by saving the following lines under ~/.config/autostart/nvidia_dpms_fix.sh.desktop

[Desktop Entry]
Name=NVidia DPMS fix
Comment=Wakes up the display properly

I believe the problem that is being worked around is indicated by a line in the Xorg.0.log:

(WW) NVIDIA(GPU-0): AUO (DFP-3): Failed to set DisplayPort power state

Although I could only test this on my machine (HP EliteBook 8440p), with some luck this works for all cases where a similar log message is found.

Fedora 14 on HP 8440p

The new version of Fedora is out since yesterday and available for download.

Naturally, my private notebook is the first place for me to perform the upgrade. Although the new Nouveau driver detects the resolution (1600×900) and runs just fine, I really want fully accelerated graphics and for that purpose still have to resort to the proprietary drivers from NVIDIA to use the NVS 3100M card in my HP EliteBook 8440p. Not the least reason for this is, that I love GNOME Shell which requires accelerated graphics.

Here is a summary specifically for the 8440p with a resolution of 1600×900. (as root):

yum localinstall --nogpgcheck http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm
yum update
yum install kmod-nvidia


nvidia-settings -r

Verify, that Xorg is configured to use the proprietary driver. A minimal /etc/X11/xorg.conf should look like this:

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"

Finally, since the driver doesn’t support Kernel Mode-Setting (KMS), open the Grub configuration at /boot/grub/grub.conf and append the following parameter to the kernel configuration (behind rdblacklist=nouveau): vga=0x34D.

Update (2011-02-28): To make the video wake up properly after suspend to RAM (sleep), add the following kernel parameter: acpi_sleep=nonvs.

HP Ambient Light Sensor on Linux

Often, the simple answers are those you don’t find on the web. Here is one of them with hopefully enough keywords to make it findable:
To activate the Ambient Light Sensor on my new HP EliteBook 8440p (article and pictures will follow later) running Fedora 13, the following command (issued by root obviously) did the trick:

echo 1 > /sys/devices/platform/hp-wmi/als

Also don’t forget to check if the ALS is enabled in the BIOS if this doesn’t work. It seems to be enabled by default though.