by tweaking a bit some config files, i managed to get accidentally the '550+' fps in glxgears (and a smooth compiz) !
when i boot without configuring the network (a RT2500 pcmcia wifi card) the performance is good then when i manually configure the network (iwconfig, ifconfig and route) i get the following messages in the log, and performance are reduced. So the problem seems to be about IRQ20. I continue my investigations... (i'm a beginner !) [ 5028.636000] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 5043.240000] irq 20: nobody cared (try booting with the "irqpoll" option) [ 5043.240000] [<c015b594>] __report_bad_irq+0x24/0x80 [ 5043.240000] [<c015b852>] note_interrupt+0x262/0x2a0 [ 5043.240000] [<c015aab0>] handle_IRQ_event+0x30/0x60 [ 5043.240000] [<c015c23b>] handle_fasteoi_irq+0xbb/0xf0 [ 5043.240000] [<c0106b1b>] do_IRQ+0x3b/0x70 [ 5043.240000] [<c0105223>] common_interrupt+0x23/0x30 [ 5043.240000] [<c013007b>] sys_capset+0x12b/0x2e0 [ 5043.240000] [<e005099a>] acpi_processor_idle+0x24f/0x425 [processor] [ 5043.240000] [<e005074b>] acpi_processor_idle+0x0/0x425 [processor] [ 5043.240000] [<c0102413>] cpu_idle+0x53/0xe0 [ 5043.240000] [<c03e3a85>] start_kernel+0x325/0x3b0 [ 5043.240000] [<c03e31f0>] unknown_bootoption+0x0/0x260 [ 5043.240000] ======================= [ 5043.240000] handlers: [ 5043.240000] [<e00866a0>] (usb_hcd_irq+0x0/0x60 [usbcore]) [ 5043.240000] [<e04aa4a0>] (i915_driver_irq_handler+0x0/0x200 [i915]) [ 5043.240000] Disabling IRQ #20 -- [gutsy] performance regression with i915 xorg driver (glxgears in liveCD or after HD install) https://bugs.launchpad.net/bugs/155985 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
