I just tested TF2 fullscreen, alt-tabbed to my browser window, and alt-tabbed back to TF2 without any FPS drop.
Also, I'm using the open-source radeon driver for my Radeon 6670 video card.
Processor Information:
Vendor: AuthenticAMD
CPU Family: 0xf
CPU Model: 0x6b
CPU Stepping: 0x1
CPU Type: 0x0
Speed: 2100 Mhz
2 logical processors
2 physical processors
HyperThreading: Unsupported
FCMOV: Supported
SSE2: Supported
SSE3: Supported
SSSE3: Unsupported
SSE4a: Unsupported
SSE41: Unsupported
SSE42: Unsupported
Network Information:
Network Speed:
Operating System Version:
Debian GNU/Linux testing (jessie) (64 bit)
Kernel Name: Linux
Kernel Version: 3.14-1-amd64
X Server Vendor: The X.Org Foundation
X Server Release: 11501000
X Window Manager: Openbox
Steam Runtime Version: steam-runtime-release_2014-04-15
Video Card:
Driver: X.Org Gallium 0.4 on AMD TURKS
Driver Version: 3.0 Mesa 10.1.4
OpenGL Version: 3.0
Desktop Color Depth: 24 bits per pixel
Monitor Refresh Rate: 60 Hz
VendorID: 0x1002
DeviceID: 0x6758
Number of Monitors: 1
Number of Logical Video Cards: 1
Primary Display Resolution: 1600 x 900
Desktop Resolution: 1600 x 900
Primary Display Size: 17.01" x 9.45" (19.45" diag)
43.2cm x 24.0cm (49.4cm diag)
Primary VRAM Not Detected
Sound card:
Audio device: Realtek ALC889A
Memory:
RAM: 3962 Mb
Miscellaneous:
UI Language: English
LANG: en_US.UTF-8
Microphone: Not set
Total Hard Disk Space Available: 107942 Mb
Largest Free Hard Disk Block: 70751 Mb
Installed software:
Recent Failure Reports:
Hello @kiwec, if you're still experiencing this issue with an up to date system, please open a new issue report in the Source-1-Games issue tracker.
Closing as general video driver performance from 2014 is no longer relevant.
Nothing extracted yet.
TF2 works perfectly with AwesomeWM, until I switch tabs to see a skype message or something else. Then, when I switch back, TF2 is running at about 50fps (instead of 250), BUT there are freezes constantly, making it feel like the game is at 5fps.
The only way to avoid this is to never switch or to relaunch the game after switching.
Processor Information:
Vendor: GenuineIntel
CPU Family: 0x6
CPU Model: 0x3a
CPU Stepping: 0x9
CPU Type: 0x0
Speed: 3800 Mhz
4 logical processors
4 physical processors
HyperThreading: Unsupported
FCMOV: Supported
SSE2: Supported
SSE3: Supported
SSSE3: Supported
SSE4a: Unsupported
SSE41: Supported
SSE42: Supported
Network Information:
Network Speed:
Operating System Version:
Linux 3.10 (64 bit)
Kernel Name: Linux
Kernel Version: 3.15.2-1-ARCH
X Server Vendor: The X.Org Foundation
X Server Release: 11501000
X Window Manager: awesome
Steam Runtime Version: steam-runtime-release_2014-04-15
Video Card:
Driver: ATI Technologies Inc. AMD Radeon HD 7800 Series
Sound card:
Audio device: Intel PantherPoint HDMI
Memory:
RAM: 3912 Mb
Miscellaneous:
UI Language: English
LANG: fr_FR.UTF-8
Microphone: Not set
Total Hard Disk Space Available: 112449 Mb
Largest Free Hard Disk Block: 74299 Mb