I got round to upgrading my desktop system to Gutsy today. I’d upgraded my laptop the previous week, so was not expecting much in the way of problems.
I’d done the original install on my desktop back in the Warty days, and the root partition was a bit too small to perform the upgrade. As there was a fair bit of accumulated crud, I decided to do a clean install. Things mostly worked, but there were a few problems, which I detail below:
Dual Head Configuration
With previous releases, I was using the Radeon driver’s MergedFB mode, as it gives a better user experience than the traditional Xinerama code (3D acceleration on both heads, better performance, etc). After moving adding the MergedFB options to xorg.conf, I was just getting the same image cloned on both displays.
Looking at the X server log file, there was a message saying that MergedFB support had been removed in favour of RandR 1.2 support. And it was possible to get dual head working with the xrandr command line tool:
xrandr --output VGA-0 --right-of DVI-0
It was good to know that dual-head still worked, but I didn’t want to reconfigure this every time I restarted the machine. I didn’t find much information on how to configure the initial RandR configuration on the X.org website, but did find a useful guide on the Intel Linux Graphics website. While the guide was aimed at the Intel driver, it had enough information to get things configured for the Radeon driver. The main difference was in the naming of the outputs. Below is a an excerpt of my configuration file that configures things the way I had them previously:
Section "Device" Identifier "ATI Technologies Inc RV280 [Radeon 9200 SE]" Driver "ati" BusID "PCI:1:0:0" Option "monitor-DVI-0" "Sony SDM-S74 " Option "monitor-VGA-0" "Sony SDM-S74 " EndSection Section "Monitor" Identifier "Sony SDM-S74 " Option "DPMS" HorizSync 30-65 VertRefresh 50-75 Option "LeftOf" "Sony SDM-S74 " EndSection Section "Monitor" Identifier "Sony SDM-S74 " Option "DPMS" HorizSync 30-65 VertRefresh 50-75 EndSection Section "Screen" Identifier "Default Screen" Device "ATI Technologies Inc RV280 [Radeon 9200 SE]" Monitor "Sony SDM-S74 " DefaultDepth 16 SubSection "Display" Modes "1280x1024" "1024x768" "800x600" "640x480" Virtual 2560 1024 EndSubSection EndSection
I had originally tried setting the VGA monitor to be “RightOf” the monitor connected to the DVI, but that left me with the desktop in clone mode. The main difference I’ve noticed with this configuration compared to my previous one is that the GDM login prompt displays on the right hand head (VGA) rather than the left hand head (DVI).
Window Shadows Don’t Render
Desktop Effects were enabled by default after the install (and on the live CD). While some effects seemed to work, the shadows on the panel and drop down menus were rendered as opaque grey boxes around the windows. I ended up just disabling the effects to clear up the problem.
Firefox Crashes on Startup
When I tried to start firefox, it would momentarily display a window and then crash. This appears to be bug 133124, and seems to only occur on AMD64 systems. The problem appears to be in the ubuntulooks theme engine, and switching to a different control theme makes the problem go away, but hopefully it’ll get fixed for the final release.
Problems Rendering Ligatures in Firefox
The problems rendering ligatures in firefox seem to be back again. This problem was never really fixed, but was worked around by removing the ligature table entries from the DejaVu fonts. With the ligature table entries back, the symptoms have returned. This is bug 37828.