sluggish window dragging on r600

Alex Deucher alexdeucher at
Mon Sep 12 22:25:15 PDT 2011

On Tue, Sep 13, 2011 at 1:18 AM, Matthew Monaco <dgbaley27 at> wrote:
> On 09/12/2011 11:08 PM, Alex Deucher wrote:
>> On Mon, Sep 12, 2011 at 3:28 PM, Matthew Monaco<dgbaley27 at>
>>  wrote:
>>> I have a desktop with an integrated Radeon HD 4200 (RS880), AMD Phenom II
>>> X4
>>> 965. Driver v6.14.2
>>> I also have a laptop with an i915, Intel Core i3 M370. Driver v2.16.0
>>> Both are on linux 3.0.4. Both are running gnome 3 in fallback mode. Both
>>> have identical 1920x1080 monitors connected through HDMI ports (The
>>> laptop's
>>> LVDS is disabled).
>>> Presumably the desktop is a stronger system with a faster CPU and
>>> comparable
>>> GPU (don't know much about the differences).
>>> When I drag a window via the title bar on the laptop, everything is
>>> smooth;
>>> the window stays with the mouse cursor.
>>> When I drag a window via the title bar on the desktop, it's sluggish; the
>>> window lags behind the cursor.
>>> Is it likely that something is configured incorrectly, or is there
>>> something
>>> implemented in the intel driver that is missing from radeon?
>> You might be running is sw mode if you do not have the radeon
>> microcode packages installed.  Check your dmesg output and xorg log.
>> Alex
> Thanks Alex. I have listed the firmwares I have installed. I do not see
> anything explicitly for RS880, but I do see R600. There is a line in dmesg
> indicating the RS780 microcode is loaded. Is this the wrong one? This is my
> gpu:

It uses RS780*.bin and R600_rlc.bin.  Note that you need to include
the ucode in your initrd if you are using one with the radeon kernel
module or build it into your kernel if you built radeon into your
kernel.  Check your dmesg output and Xorg log to make sure the ucode
was available when the module loaded and that acceleration is actually


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