Option "NoAccel" in xorg.conf seems to have fixed it as I've now been using X 
for 20 mins.  2D is noticeably faster than prior kernels; I assume that's a DRI 
/ KMS advantage.

Neil.

---- On Wed, 10 Dec 2014 18:50:41 -0800 kyuupichan<[email protected]> wrote 
---- 
 > I was running a current kernel from about 3 months ago reasonably happily, 
 > and decided to upgrade to current yesterday. 
 >  
 > Unfortunately after upgrading I noticed X would freeze within a minute or 
 > two; I tried downgrading to 3.8 but that didn't work, failing during make 
 > installworld leaving the system unusable... 
 >  
 > So I installed 4.0.1 fresh from the website today, and my usual packages.  
 > Again X is freezing after a minute or two; however the kernel continues to 
 > run fine as I can log in via SSH. 
 >  
 > I've attached my dmesg and Xorg.log. 
 >  
 > Some things that might be causing it: 
 >  
 > a) The new USB subsystem.  I have a USB mouse and a old PS2 keyboard/mouse 
 > combo; there is only a keyboard physically attached via the PS2 interface.  
 > I'm using /dev/sysmouse as my mouse device for X; it works fine in the 
 > console. 
 > b) I am pretty sure it's picking up KMS and DRI / graphics acceleration for 
 > the first time.  I have an AMD Radeon HD 6310 on-board GPU.  This GPU has 
 > only been moderately well supported historically (unsure if the issue was 
 > the kernel or X) e.g. once I go into X I cannot return to a text console - 
 > the screen goes blank but I can then return to X with Ctrl-Alt-F9.  This 
 > continues to be true with Dragonfly 4.0. 
 >  
 > Any ideas / advice?  I'd like to not be stuck on 3.8 forever. 
 >  
 > Neil.


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