Package: xserver-xorg-video-ati Version: 1:6.9.0-1+lenny4 Any mouse movement over some objects (buttons, application menus, hyperlinks and so on) make the other screen objects flicker, mostly the text and lines. Just as the old TV flicks on energy spikes. The flick is 1 pixel thick and happens horizontally to the left side. For example, open Iceweasel web browser. Move with mouse over content, text, pictures, buttons, and over the browser's buttons. You even don't need to click on anything. Some motion objects, such as flash animations, also have this effect to some degree. I suspect the video driver, because 1, The same computer, Lenny, ATI card - problem 2, Ubuntu 8.10 Interpid, ATI - problem 3, Etch, ATI - NO problem. 4, Lenny, graphic card changed to TNT2 - NO problem.   So I don't see much place for hw error here, since no problems appear with Etch. Moreover, Ubuntu is affected too, so this might relate to the thing that is common for Lenny and Interpid, and that might be some version of X. I'll try with Ubuntu 8.04 Hardy also and let You know..   The video device (lspci -vv): 02:00.0 VGA compatible controller: ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE] (prog-if 00 [VGA controller])     Subsystem: PC Partner Limited Sapphire Radeon VE 7000 DDR     Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping+ SERR- FastB2B- DisINTx-     Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-     Latency: 32 (2000ns min), Cache Line Size: 32 bytes     Interrupt: pin A routed to IRQ 19     Region 0: Memory at e0000000 (32-bit, prefetchable) [size=128M]     Region 1: I/O ports at d000 [size=256]     Region 2: Memory at ed000000 (32-bit, non-prefetchable) [size=64K]     [virtual] Expansion ROM at ec000000 [disabled] [size=128K]     Capabilities: [58] AGP version 2.0         Status: RQ=48 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW- AGP3- Rate=x1,x2,x4         Command: RQ=32 ArqSz=0 Cal=0 SBA+ AGP+ GART64- 64bit- FW- Rate=x4     Capabilities: [50] Power Management version 2         Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)         Status: D0 PME-Enable- DSel=0 DScale=0 PME-     Kernel modules: radeonfb