sluggish window dragging on r600

Matthew Monaco dgbaley27 at
Mon Sep 12 22:36:45 PDT 2011

On 09/12/2011 11:25 PM, Alex Deucher wrote:
> 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
> enabled.
> Alex

The firmware is included in my initrd. I don't see any dmesg stating that it's 
missing at any point. In xorg log:

RADEON(0): Acceleration enabled

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