M3N78-EM Motherboard w/ Brisbane Processor (onboard nvidia 8300)
1080p 60Hz Panasonic Plasma TV (TH-50PF11UK)
I've been having trouble with very sluggish UI2 (no alpha blending) and very bad tearing in 810 with my installation on this hardware. OpenGL performance seems to be all around terrible. I have tried many different driver versions from 177 to 185.
I believe the issue is not caused by LinuxMCE. I am posting here regardless because I know there are a number of users who have the same motherboard and I am appealing to those people for help. Why do I think the issue is independent of Linuxmce?
I decided to reinstall Kubuntu 810 and evaluate video performance BEFORE installing linuxmce.
Independant of nvidia driver version, VGA, DVI, or HDMI port: Glxgears run in a maximized window with VSync turned off is giving 45fps, stutters and tears horribly. Turning vsync on, the framerate drops to below 25 and the test looks even worse. I did this same test a while ago with an 8500GT PCIE installed on the same mobo and got framerates closer to 600 to 700 with no VSync. Everything worked wonderfully with this PCIE card.Questions for M3N78-EM users who have working setups:
Below is the last few lines from "cat /proc/interrupts"
16: 56 13942 IO-APIC-fasteoi eth1
17: 0 2 IO-APIC-fasteoi ohci1394
20: 232 377198 IO-APIC-fasteoi ehci_hcd:usb4, nvidia
21: 0 309 IO-APIC-fasteoi ehci_hcd:usb3, HDA Intel
22: 1 272 IO-APIC-fasteoi ohci_hcd:usb2
23: 3 8813 IO-APIC-fasteoi ohci_hcd:usb1
219: 1572 633093 PCI-MSI-edge eth0
220: 87 67450 PCI-MSI-edge ahci
Does this look different from yours? Has anyone managed to get nvidia on its own interrupt through some bios settings?
How does your glxgears performance compare to mine?Could video performance be compromised if the card is not running at a precisely standard resolution / modeline timing?
I found the following in my Xorg.0.log:
(==) NVIDIA(0): No modes were requested; the default mode "nvidia-auto-select"
(==) NVIDIA(0): will be used as the requested mode.
(II) NVIDIA(0): Validated modes:
(II) NVIDIA(0): "nvidia-auto-select"
(II) NVIDIA(0): Virtual screen size determined to be 1920 x 1080
It seems the plasma TV is not communicating EDID information properly as I recall usually seeing mode validation performed in this section of the log. Could this be related somehow?Anyone have any idea what could be wrong with my setup?
Thanks in advance.
EDIT: Fixed CPU type