Dell Optiplex GX260 82845G/GL only supports 640x480

Hello,

I am trying to use Knoppix on a Dell Optiplex GX260 using the video hardware displayed below. It is a flat screen monitor, DEL Ultrasharp. However when I boot up, I can only use the 640x480 mode. I have tried using ctrl-alt-+ to try to change video modes but it has no effect.

Video is IntelCorp | 82845G/GL [Brookdale-G] Chipset Integrated Graphics Device; using XFfree86(i810) Server
Monitor is DELe000, H:30-80kHz, V:56-85Hz
Using Modes "1024x768" "800x600" "640x480"

I have also tried it with another monitor, the IBM 17' P70, which is a normal CRT monitor, and the same effect occurs. Under Windows 2000 this monitor supports 1280x1024.

Can someone please assist me with resolving this.

Some outputs are given below.
-------------------------------------------------------------

Here is the output of sudo lspci -v.

00:02.0 VGA compatible controller: Intel Corp. 82845G/GL [Brookdale-G] Chipset Integrated Graphics Device (rev 01) (prog-if 00 [VGA])
Subsystem: Dell Computer Corporation: Unknown device 0126
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at e8000000 (32-bit, prefetchable) [size=128M]
Memory at ff680000 (32-bit, non-prefetchable) [size=512K]
Capabilities: [d0] Power Management version 1

------------------------------------------------------------------------------------------------------------------------------

Some output from the XFree86.0.log is given below. The most interesting lines are.
(II) I810(0): Not using mode "1024x768" (no mode of this name)<<<<<<<<<
(II) I810(0): Not using mode "800x600" (no mode of this name)<<<<<<<<<

Can someone please assist me with this.

-------------snip -----------

(II) I810(0): Supported VESA Video Modes:
(II) I810(0): 720x400@70Hz
(II) I810(0): 640x480@60Hz
(II) I810(0): 640x480@75Hz
(II) I810(0): 800x600@60Hz
(II) I810(0): 800x600@75Hz
(II) I810(0): 1024x768@60Hz
(II) I810(0): 1024x768@75Hz
(II) I810(0): 1280x1024@75Hz

--------snip---------

Mode: 34 (1024x768)
ModeAttributes: 0x9b
WinAAttributes: 0x7
WinBAttributes: 0x0
WinGranularity: 64
WinSize: 64
WinASegment: 0xa000
WinBSegment: 0x0
WinFuncPtr: 0xc0005aef
BytesPerScanline: 1024

-------snip---------


Mode: 45 (1024x768)
ModeAttributes: 0x9a
WinAAttributes: 0x7
WinBAttributes: 0x0
WinGranularity: 64
WinSize: 64
WinASegment: 0xa000
WinBSegment: 0x0
WinFuncPtr: 0xc0005aef
BytesPerScanline: 2048


----------snip--------

Mode: 54 (1024x768)
ModeAttributes: 0x9a
WinAAttributes: 0x7
WinBAttributes: 0x0
WinGranularity: 64
WinSize: 64
WinASegment: 0xa000
WinBSegment: 0x0
WinFuncPtr: 0xc0005aef
BytesPerScanline: 4096

-----------snip---------

(II) I810(0): Monitor0: Using hsync range of 30.00-80.00 kHz
(II) I810(0): Monitor0: Using vrefresh range of 56.00-85.00 Hz
(II) I810(0): Not using mode "1024x768" (no mode of this name)<<<<<<<<<
(II) I810(0): Not using mode "800x600" (no mode of this name)<<<<<<<<<
(II) I810(0): Increasing the scanline pitch to allow tiling mode (640 -> 1024).
(--) I810(0): Virtual size is 640x480 (pitch 1024)
(**) I810(0): *Built-in mode "640x480"
(II) I810(0): Attempting to use 75Hz refresh for mode "640x480" (41)
(++) I810(0): DPI set to (75, 75)
(II) Loading sub module "fb"
(II) LoadModule: "fb"
(II) Loading /usr/X11R6/lib/modules/libfb.a
(II) Module fb: vendor="The XFree86 Project"
compiled for 4.3.0, module version = 1.0.0
ABI class: XFree86 ANSI C Emulation, version 0.2
(II) Loading sub module "xaa"
(II) LoadModule: "xaa"
(II) Loading /usr/X11R6/lib/modules/libxaa.a
(II) Module xaa: vendor="The XFree86 Project"
compiled for 4.3.0, module version = 1.1.0
ABI class: XFree86 Video Driver, version 0.6
(II) Loading sub module "ramdac"
(II) LoadModule: "ramdac"
(II) Loading /usr/X11R6/lib/modules/libramdac.a
(II) Module ramdac: vendor="The XFree86 Project"
compiled for 4.3.0, module version = 0.1.0
ABI class: XFree86 Video Driver, version 0.6
(II) Loading sub module "shadow"
(II) LoadModule: "shadow"
(II) Loading /usr/X11R6/lib/modules/libshadow.a
(II) Module shadow: vendor="The XFree86 Project"
compiled for 4.3.0, module version = 1.0.0
ABI class: XFree86 ANSI C Emulation, version 0.2
(II) do I need RAC? No, I don't.


---------snip-----------

------------------------------------------------------------------------------------------------

Full output of lspci -v

00:00.0 Host bridge: Intel Corp. 82845G/GL [Brookdale-G] Chipset Host Bridge (rev 01)
Subsystem: Dell Computer Corporation: Unknown device 0126
Flags: bus master, fast devsel, latency 0
Memory at f0000000 (32-bit, prefetchable) [size=128M]
Capabilities: [e4] #09 [0105]

00:02.0 VGA compatible controller: Intel Corp. 82845G/GL [Brookdale-G] Chipset Integrated Graphics Device (rev 01) (prog-if 00 [VGA])
Subsystem: Dell Computer Corporation: Unknown device 0126
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at e8000000 (32-bit, prefetchable) [size=128M]
Memory at ff680000 (32-bit, non-prefetchable) [size=512K]
Capabilities: [d0] Power Management version 1

00:1d.0 USB Controller: Intel Corp. 82801DB USB (Hub #1) (rev 01) (prog-if 00 [UHCI])
Subsystem: Dell Computer Corporation: Unknown device 0126
Flags: bus master, medium devsel, latency 0, IRQ 16
I/O ports at ff80 [size=32]

00:1d.1 USB Controller: Intel Corp. 82801DB USB (Hub #2) (rev 01) (prog-if 00 [UHCI])
Subsystem: Dell Computer Corporation: Unknown device 0126
Flags: bus master, medium devsel, latency 0, IRQ 19
I/O ports at ff60 [size=32]

00:1d.2 USB Controller: Intel Corp. 82801DB USB (Hub #3) (rev 01) (prog-if 00 [UHCI])
Subsystem: Dell Computer Corporation: Unknown device 0126
Flags: bus master, medium devsel, latency 0, IRQ 18
I/O ports at ff40 [size=32]

00:1d.7 USB Controller: Intel Corp. 82801DB USB EHCI Controller (rev 01) (prog-if 20 [EHCI])
Subsystem: Dell Computer Corporation: Unknown device 0126
Flags: bus master, medium devsel, latency 0, IRQ 23
Memory at ffa00800 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Capabilities: [58] #0a [2080]

00:1e.0 PCI bridge: Intel Corp. 82801BA/CA/DB PCI Bridge (rev 81) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=32
I/O behind bridge: 0000e000-0000efff
Memory behind bridge: ff800000-ff9fffff

00:1f.0 ISA bridge: Intel Corp. 82801DB ISA Bridge (LPC) (rev 01)
Flags: bus master, medium devsel, latency 0

00:1f.1 IDE interface: Intel Corp. 82801DB ICH4 IDE (rev 01) (prog-if 8a [Master SecP PriP])
Subsystem: Dell Computer Corporation: Unknown device 0126
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 ffa0 [size=16]
Memory at 10000000 (32-bit, non-prefetchable) [size=1K]

00:1f.3 SMBus: Intel Corp. 82801DB SMBus (rev 01)
Subsystem: Dell Computer Corporation: Unknown device 0126
Flags: medium devsel, IRQ 17
I/O ports at dc80 [size=32]

00:1f.5 Multimedia audio controller: Intel Corp. 82801DB AC'97 Audio (rev 01)
Subsystem: Dell Computer Corporation: Unknown device 0126
Flags: bus master, medium devsel, latency 0, IRQ 17
I/O ports at d800 [size=256]
I/O ports at dc40 [size=64]
Memory at ffa00400 (32-bit, non-prefetchable) [size=512]
Memory at ffa00000 (32-bit, non-prefetchable) [size=256]
Capabilities: [50] Power Management version 2

01:0c.0 Ethernet controller: Intel Corp. 82540EM Gigabit Ethernet Controller (rev 02)
Subsystem: Dell Computer Corporation: Unknown device 002e
Flags: bus master, 66Mhz, medium devsel, latency 64, IRQ 18
Memory at ff8e0000 (32-bit, non-prefetchable) [size=128K]
I/O ports at ecc0 [size=64]
Capabilities: [dc] Power Management version 2
Capabilities: [e4] PCI-X non-bridge device.
Capabilities: [f0] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-

I need help with this too! I have an Optiplex 270 with the same problem. I need more than 640x480!!!!

TIA,

I got my GX270 working OK with:

boot: knoppix vga=normal screen=1280x1024 xvrefresh=60

adjust your refresh rate accordingly!

EDIT: and sound works finally with 2003.0905!

Good Luck,

Hello,

Unfortunately this didn't fix it. Thanks anyway for your help,

Thanks
Ian

try Kxcontrol. I had the same problem (althoug on other hardware, and I only got 800x600) and Kxcontrol fixed it for me.

but that was AFTER hd-install... I guess you can't use Kxcontrol to fix it on the live-cd...

I also have this problem in Dell Optiplex GX260 which use Intel 865 videocard. And I found the reason after 4 hours struggle...

We should enter the BIOS, and change the Setting of buffer of video card (may be some different between others , but i am sure all can finally find it), from default 1M to 8M. Then all ok!

I think Dell should point this on their support site, but they do nothing...

Dell is popular in China these years, my boss like Dell , but i become more and more dislike it... Next time, I will sugguest my boss to choose HP, Lenovo or Founder...

Hello Hax,

Thank you very much for your help. We just tried the BIOS setting and it works perfectly. You are very clever to have found this fix.

Take Care,
Ian :D