I have here a pretty new netbook, Acer Aspire One 522, which is based on a low-end implementation of the AMD Fusion stuff, the C-50 CPU with graphics identified in Xorg.0.log as HD 6250. If I boot F15 Alpha TC2 desktop live image, splash screen and GDM come up fine, but on logging in, I get a screen with a pointer and the background but nothing else, and after a bit the system hangs (can't move the pointer or switch to a VT). If I boot to runlevel 3 and run startx as liveuser, X will start up and be running in the background and as long as I stay in console VTs I can do stuff as long as I like, the system doesn't hang...but as soon as I actually switch to the VT where X went, I see the background and a pointer and nothing else, as in the direct-to-X boot case. I can move the cursor for a couple of seconds, but then it hangs just the same as in the direct-to-X boot case. From /var/log/messages it appears that a full X session does actually run, it's just not visible. I can see messages from NetworkManager and PackageKit and all sorts of other things that clearly come from apps which have got started as part of the X session. .xsession-errors doesn't actually exist for liveuser, so there's nothing in there. /var/log/Xorg.0.log looks unhelpful also. I will include it, though. There's a lot of drm stuff in dmesg with drm.debug=15, so I'll include that. I'll also shortly test and see if a non-accelerated desktop like Xfce will run.
Created attachment 479195 [details] Xorg.0.log from affected system (booted to runlevel 3, startx then run)
Created attachment 479196 [details] dmesg from affected system
Created attachment 479197 [details] /var/log/messages from affected system
Any more luck after updating to lastest stuff ?
hold on, i'll grab a nightly and check.
With a 2011-03-27 nightly, no joy. Boots direct to a background and movable cursor but no desktop at all, ps claims gnome-shell is running. .xsession-errors is full of telepathy spam but also has recurrent: Clutter-CRITICAL **: Unable to make the stage window 0x200009 the current GLX drawable" errors. 2011-03-27 nightly has kernel 2.6.38-1.fc15 , xorg-x11-drv-ati 6.14.0-5.20110204gitblahblah , and mesa 7.10-0.29; do you need me to test newer versions of any of those? if so i'll have to roll a custom live.
I'm building a custom live with all the latest kernel, xorg and mesa stuff to see if that's different.
with xorg-x11-server-1.10.0-6.fc15 , mesa-7.11-0.1.20110327.0.fc15 , kernel-2.6.38.2-8.fc15 , and xorg-x11-drv-ati-6.14.0-7.20110316gitcdfc007ec.fc15 , it works! Shell comes up and seems to run fine in quick testing. So we need to get all that stuff into dist-f15, I'll check if updates are filed.