[Bug 29140] [rs690] Freeze at Xorg startup when using KMS

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=29140

--- Comment #7 from steckdenis at yahoo.fr 2010-07-23 04:39:11 PDT ---
Hello,

To do what you asked, I needed to run my second computer. I usually have a
two-screen setup, with a 1280x1024 screen connected to the VGA output of my
netbook, and its 1366x768 LVDS screen.

When I disconnected the external screen to use it with my other computer, it
booted nicely. KDM showed up as espected, and I managed to login. Glxinfo
showed many visuals (sign that KMS and DRI2 are used), and glxgears runned
slowly (DRI2 performance hit).

Then, I rebooted my netbook with its two screens, logged in in a virtual
terminal, started sshd, re-inserted radeon with modeset=1 and launched KDM. It
failed as espected.

I disconnected my sreen and attached it to my other computer. Then I sshed my
netbook.

"top" showed that the processor was unused (at nearly 0%). The ssh connection
was fast and responsive.

I started GDB and attached it to the running /usr/bin/X process. Unfortunately,
it was not compiled with debugging symbols, so my stack trace is useless.

#0  0x00007f47e7d94093 in ?? ()
#1  0x000000000040f653 in ?? ()
#2  0x00007fffdf082ec0 in ?? ()
#3  0x00007fffdf084e0d in ?? ()
#4  0x0000000000000090 in ?? ()
#5  0x0000000000000000 in ?? ()

I hope the fact it works with a single-head setup will help you. I also have to
say that without KMS, my primary screen (the one that shows the Plasma panel)
is the LVDS. With KMS, it's the external one. If it helps you.

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