Apparently, the MGA g550 should have shared the IRQ 16 with the
(onboard) USB controllers (Intel ICH 865G chipset):
-------------------------------------------------------------
lspci -v:
00:00.0 Host bridge: Intel Corp. 82865G/PE/P Processor to I/O Controller
(rev 02)
Subsystem: ABIT Computer Corp.: Unknown device 100a
Flags: bus master, fast devsel, latency 0
Memory at e8000000 (32-bit, prefetchable) [size=128M]
Capabilities: <available only to root>
00:01.0 PCI bridge: Intel Corp. 82865G/PE/P Processor to AGP Controller
(rev 02) (prog-if 00 [Normal decode])
Flags: bus master, 66Mhz, fast devsel, latency 64
Bus: primary=00, secondary=01, subordinate=01, sec-latency=32
Memory behind bridge: f2000000-f4ffffff
Prefetchable memory behind bridge: f0000000-f1ffffff
00:1d.0 USB Controller: Intel Corp. 82801EB USB (rev 02) (prog-if 00 [UHCI])
Subsystem: ABIT Computer Corp.: Unknown device 100a
Flags: bus master, medium devsel, latency 0, IRQ 16
I/O ports at bc00 [size=32]
00:1d.1 USB Controller: Intel Corp. 82801EB USB (rev 02) (prog-if 00 [UHCI])
Subsystem: ABIT Computer Corp.: Unknown device 100a
Flags: bus master, medium devsel, latency 0, IRQ 19
I/O ports at b000 [size=32]
00:1d.2 USB Controller: Intel Corp. 82801EB USB (rev 02) (prog-if 00 [UHCI])
Subsystem: ABIT Computer Corp.: Unknown device 100a
Flags: bus master, medium devsel, latency 0, IRQ 18
I/O ports at b400 [size=32]
00:1d.3 USB Controller: Intel Corp. 82801EB USB (rev 02) (prog-if 00 [UHCI])
Subsystem: ABIT Computer Corp.: Unknown device 100a
Flags: bus master, medium devsel, latency 0, IRQ 16
I/O ports at b800 [size=32]
00:1d.7 USB Controller: Intel Corp. 82801EB USB2 (rev 02) (prog-if 20
[EHCI])
Subsystem: ABIT Computer Corp.: Unknown device 100a
Flags: bus master, medium devsel, latency 0, IRQ 23
Memory at f7100000 (32-bit, non-prefetchable) [size=1K]
Capabilities: <available only to root>
00:1e.0 PCI bridge: Intel Corp. 82801BA/CA/DB/EB PCI Bridge (rev c2)
(prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=02, subordinate=02, sec-latency=32
I/O behind bridge: 0000a000-0000afff
Memory behind bridge: f5000000-f6ffffff
Prefetchable memory behind bridge: f7000000-f70fffff
00:1f.0 ISA bridge: Intel Corp. 82801EB LPC Interface Controller (rev 02)
Flags: bus master, medium devsel, latency 0
00:1f.1 IDE interface: Intel Corp. 82801EB Ultra ATA Storage Controller
(rev 02) (prog-if 8a [Master SecP PriP])
Subsystem: ABIT Computer Corp.: Unknown device 100a
Flags: bus master, medium devsel, latency 0, IRQ 18
I/O ports at <unassigned>
I/O ports at <unassigned>
I/O ports at <unassigned>
I/O ports at <unassigned>
I/O ports at f000 [size=16]
Memory at 10000000 (32-bit, non-prefetchable) [size=1K]
00:1f.2 IDE interface: Intel Corp. 82801EB Ultra ATA Storage Controller
(rev 02) (prog-if 8f [Master SecP SecO PriP PriO])
Subsystem: ABIT Computer Corp.: Unknown device 100a
Flags: bus master, 66Mhz, medium devsel, latency 0, IRQ 18
I/O ports at c000 [size=8]
I/O ports at c400 [size=4]
I/O ports at c800 [size=8]
I/O ports at cc00 [size=4]
I/O ports at d000 [size=16]
00:1f.3 SMBus: Intel Corp. 82801EB SMBus Controller (rev 02)
Subsystem: ABIT Computer Corp.: Unknown device 100a
Flags: medium devsel, IRQ 17
I/O ports at 0500 [size=32]
00:1f.5 Multimedia audio controller: Intel Corp. 82801EB AC'97 Audio
Controller (rev 02)
Subsystem: ABIT Computer Corp.: Unknown device 100a
Flags: bus master, medium devsel, latency 0, IRQ 17
I/O ports at d800 [size=256]
I/O ports at dc00 [size=64]
Memory at f7101000 (32-bit, non-prefetchable) [size=512]
Memory at f7102000 (32-bit, non-prefetchable) [size=256]
Capabilities: <available only to root>
01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G550 AGP
(rev 01) (prog-if 00 [VGA])
Subsystem: Matrox Graphics, Inc. Millennium G550 Dual Head DDR 32Mb
Flags: bus master, medium devsel, latency 64, IRQ 16
Memory at f0000000 (32-bit, prefetchable) [size=32M]
Memory at f2000000 (32-bit, non-prefetchable) [size=16K]
Memory at f3000000 (32-bit, non-prefetchable) [size=8M]
Expansion ROM at <unassigned> [disabled] [size=128K]
Capabilities: <available only to root>
02:02.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8139/8139C/8139C+ (rev 10)
Subsystem: ABIT Computer Corp.: Unknown device 1016
Flags: bus master, medium devsel, latency 32, IRQ 18
I/O ports at a000 [size=256]
Memory at f6000000 (32-bit, non-prefetchable) [size=256]
Expansion ROM at <unassigned> [disabled] [size=64K]
Capabilities: <available only to root>
02:04.0 Multimedia video controller: Brooktree Corporation Bt878 Video
Capture (rev 11)
Subsystem: Pinnacle Systems Inc. PCTV pro (TV + FM stereo receiver)
Flags: bus master, medium devsel, latency 32, IRQ 20
Memory at f7000000 (32-bit, prefetchable) [size=4K]
Capabilities: <available only to root>
02:04.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture
(rev 11)
Subsystem: Pinnacle Systems Inc. PCTV pro (TV + FM stereo receiver,
audio section)
Flags: bus master, medium devsel, latency 32, IRQ 20
Memory at f7001000 (32-bit, prefetchable) [size=4K]
Capabilities: <available only to root>
02:09.0 Ethernet controller: Accton Technology Corporation EN-1216
Ethernet Adapter (rev 11)
Subsystem: Standard Microsystems Corp [SMC]: Unknown device 1255
Flags: bus master, medium devsel, latency 32, IRQ 17
I/O ports at a400 [size=256]
Memory at f6001000 (32-bit, non-prefetchable) [size=1K]
Expansion ROM at <unassigned> [disabled] [size=128K]
Capabilities: <available only to root>
