Errata ROSA Desktop R1

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Known release problems

Hardware issues

Warning with AMD Radeon HD 2xxx-4xxx series card

AMD does not provide update compatible with the latest version of Xorg 1.13 embedded in ROSA 2012 Desktop. Don't try to install Catalyst 12.6 driver unless you know exactly what you are doing.

Incorrect screen resolution after boot

If you monitor supports high resolution but a lower one is chosen during the boot, use the following workaround:

1. Install lxrandr

2. Launch it from a command line AS A USER and set necessary resolution from the list appeared

3. Press SAVE to create a config file that will be automatically used in future

When using proprietary NVIDIA or AMD/ATI drivers, artifacts can appear on the screen during the boot

If you see artifacts on your display, press Ctrl+Alt+Backspace to restart X-Server

I have hybrid ATI/Intel graphics and I cannot boot using ATI card

Unfortunately, the full-featured support of this combination is announced but not implemented correctly (yet) in X-Server 13. Use Intel graphics card by disabling AMD/ATI one in BIOS or add "xserver=intel" by editing edit the following line in the /etc/default/grub file (with root privileges):

GRUB_CMDLINE_LINUX_DEFAULT='splash=silent logo.nologo'

We'll get you know when support for this cards combination will be fixed.

Backlight/Brightness workaround for laptop Packard Bell TE11HC-B8302G50Mnks

The FN-F11 and FN-F12 combinations doesn't work to adjust brightness/backlight of screen. When you push this combinations nothing happens.

Solution: To have a functional brightness adjustment you need to put acpi_osi=Linux acpi_backlight=vendor on the grub line with mcc. After a reboot all is ok, you can set brightness up or down with button combo.

Workaround for keyboard's additionnal €, $ and lens key

Need to add this at the end of /etc/rc.d/rc.local: setkeycodes e01a 217 # Touche loupe setkeycodes e034 219 # Touche $ setkeycodes e033 221 # Touche € xmodmap -e 'keycode 229 = EuroSign' xmodmap -e 'keycode 227 = dollar'

Start in recovery mode

Start in recovery mode. Mode "recovery" isn't present by default in ROSA Grub. If you find yourself stuck for one reason or another you can still force a recovery boot by following this procedure:

1. Boot to the standard Grub2 menu and stay with the first entry

2. Type "E" for edit

3. Locate the line "init =/lib/systemd/systemd" and move the cursor at the end

4. Insert a space then type => "failsafe" as shown the example

5. Then, without doing anything else, press the F10 key.

You are in console as root to make corrections

Add "recovery mode" in grub

It is possible to always have "recovery mode" entries in the grub bootloader

1. Go to the KDE Control Center (systemsettings)

2. Go to "System Administration" section, select "Startup and Shutdown" and check the option to generate recovery entries.

Failed to start ROSA on DELL D610 and similar models

Symptoms: Boot menu appears correctly, you can select Install entry, then you have the dracut screenloader.... And this is it. End of story. Nothing happens after... except a black screen.

Solution: Disable the touchpad in BIOS and use a external mouse. You can enable the touchpad once the system is install.

ATI Radeon HDMI audio issues

To make HDMI sound functional in a system with an ATI HDMI sound adaptor, one needs to do this:

1. System up to date.

2. Go to the KDE Control Center (systemsettings)

3. Go to "System Administration" section, select "Startup and Shutdown" and select "GRUB2 Bootloader" section.

4. Go the advanced tab then add "radeon.audio=1" to the "All entries" field and Apply.

5. Use "PulseAudio Volume Control" tool (pavucontrol) to select HDMI output

Software issues

Applications that use OSS don't work (no /dev/dsp or /dev/audio)

Since old OSS modules are not supported anymore, you should use ossp - free implementation of OSS wrapper in Pulseaudio. Install it using this command:

urpmi ossp

or using the package manager and reboot. Check if the cuse module is loaded:

lsmod | grep cuse

If everything is ok, applications can use OSS as usual..

Cracking sound in Skype and VLC

On some hardware configurations, one can get a crackling sound in Skype. To solve this issue, open /etc/pulse/default.pa file with root privileges and find the following line:

load-module module-udev-detect 

replace it with:

load-module module-udev-detect tsched=0

Save changes and reboot. For more information, see #288