Version: unspecified (using KDE 4.5.1) OS: Linux I have a multi-monitor setup with my laptop screen and an additional VGA screen at the right. However, the rightmost 2 or 3 pixels of my laptop screen also appear on the VGA, which of course looks rather weird. I am also under the impression that the same amount of pixels is cut off at the right of the VGA screen. Reproducible: Always My laptop has a ATI Radeon HD 3200, I am using Kubuntu 10.10 with the binary ATI drivers.
Can you check if this is just the window decorations shadow appearing overlapped to the other screen? You can disable shadows using Alt+Shift+F12. Please also try a different window decoration, such as Plastik, which does not render a shadow.
It's definitely more than just the shadows: I can see the right end of the mouse cursor on the right screen while there still is a pixel right of it on the left screen. Windows maximized on the right screen have that overlapping space left of them. The geometry info given in the "Multiple Monitors" section: Screen 1 starts at (x) 0 and has a width of 1366, and screen 2 starts at 1366.
Same here. Apparently since my upgrade to KDE SC 4.5.4. A quite large part of my notebook screen is occupied by a strip (at the right side, quite wide, about 1/12th of the screen) that shows the contents of the left side of my external monitor (I have a vertical panel with application icons that I use often, configured there). My external monitor is configured to be 'at the left side' of my notebook (which is physically positioned to the left of my notebook). The notebook screen that has the strip at the right has problems with the mouse pointer being at a different position then what is displayed. Clicking something is difficult because the click ends up somewhere else than expected. Before the upgrade to KDE SC 4.5.4 I did not have these problems and my multiple monitor setup worked fine.
Created attachment 54075 [details] Photograph of my laptop screen that has a strip at the right with content of external screen. Although the photograph is a bit out of focus the vertical strip at the right of the clock, cpu temperature and cpu load widgets is clearly visible.
# kwin -v Qt: 4.7.0 KDE Development Platform: 4.5.4 (KDE 4.5.4) KWin: 4.5.4 (KDE 4.5.4) # lshw -C display *-display description: VGA compatible controller product: GT215 [GeForce GT 335M] vendor: nVidia Corporation physical id: 0 bus info: pci@0000:01:00.0 version: a2 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress vga_controller bus_master cap_list rom configuration: driver=nouveau latency=0 resources: irq:16 memory:d2000000-d2ffffff memory:c0000000-cfffffff memory:d0000000-d1ffffff ioport:d000(size=128) memory:d3000000-d307ffff *-display description: VGA compatible controller product: Core Processor Integrated Graphics Controller vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 18 width: 64 bits clock: 33MHz capabilities: msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:47 memory:d3400000-d37fffff memory:b0000000-bfffffff ioport:e080(size=8) # lshw -C cpu *-cpu description: CPU product: Intel(R) Core(TM) i5 CPU M 450 @ 2.40GHz vendor: Intel Corp. physical id: 4 bus info: cpu@0 version: Intel(R) Core(TM) i5 CPU M 450 @ 2.40GH serial: To Be Filled By O.E.M. slot: Socket 989 size: 1199MHz capacity: 4GHz width: 64 bits clock: 133MHz capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp x86-64 constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt lahf_lm ida arat tpr_shadow vnmi flexpriority ept vpid cpufreq
I can confirm and reproduce this bug. It appears only if compositing via opengl is enabled, but with KDE 4.5.4 and KDE 4.6RC2. No Problems, when I don't use desktop effects.
(In reply to comment #6) > It appears only if compositing via opengl is enabled, but with KDE 4.5.4 and > KDE 4.6RC2. No Problems, when I don't use desktop effects. Unfortunately, I can not confirm that observation. I have desktop effects disabled for a while now, and I still have that issue when I plug in a 2nd screen (which I rarely do, due to this bug and crappy proprietary ATI drivers requiring me to re-boot... different story, though)
I change the distribution (Kubuntu => Debian testing) and the multi-screen configuration method (I previously used the Catalyst Control Center, now I am using xrandr). Still using KDE 4.6, this bug is now gone for good - makes multi-monitor much more enjoyable :)
Closing based on comment #8