When starting X, everything is really slow. Dragging windows produces an astonishing amount of lag, and CPU usage is really high when idle (50-75%). Opening Firefox takes the CPU to 100%, and trying to scroll the page in a simple HTML page is impossible. This is happening with a G3 processor, but, as far as I know, it shouldn't be that slow. I am pretty sure that hardware acceleration is not working. This is confirmed by an error message during boot, that I attach below. An OpenBSD installation has the exact same problem, with the exact same error.
The machine is an iBook G3 "Snow"
GPU: ATI Mobility Radeon 7500
Installed drivers are xf86-video-ati and mesa
Output of dmesg | grep radeon:
[ 14.561128] radeonfb 0000:00:10.0: enabling device (0086 -> 0087)
[ 14.561192] radeonfb 0000:00:10.0: BAR 0: can't reserve [mem 0x98000000-0x9fffffff pref]
[ 14.561199] radeonfb (0000:00:10.0): cannot request region 0.
[ 14.561232] radeonfb: probe of 0000:00:10.0 failed with error -16
[ 17.141874] [drm] radeon kernel modesetting enabled.
[ 17.142177] fb: switching to radeondrmfb from OFfb ATY,Bee_A
[ 17.147222] fb: switching to radeondrmfb from OFfb ATY,Bee_B
[ 17.150317] radeon 0000:00:10.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0x0000
[ 17.150348] radeon 0000:00:10.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0x0000
[ 17.151379] [drm:radeon_get_bios [radeon]] *ERROR* Unable to locate a BIOS ROM
[ 17.151739] radeon 0000:00:10.0: putting AGP V2 device into 2x mode
[ 17.151790] radeon 0000:00:10.0: GTT: 256M 0x00000000 - 0x0FFFFFFF
[ 17.151810] radeon 0000:00:10.0: VRAM: 128M 0x0000000098000000 - 0x000000009FFFFFFF (32M used)
[ 17.152384] [drm] radeon: 32M of VRAM memory ready
[ 17.152390] [drm] radeon: 256M of GTT memory ready.
[ 17.160042] radeon 0000:00:10.0: WB disabled
[ 17.160073] radeon 0000:00:10.0: fence driver on ring 0 use gpu addr 0x0000000000000000 and cpu addr 0xd1c2b000
[ 17.160190] [drm] radeon: irq initialized.
[ 17.160352] radeon 0000:00:10.0: Direct firmware load for radeon/R100_cp.bin failed with error -2
[ 17.160363] radeon_cp: Failed to load firmware "radeon/R100_cp.bin"
[ 17.161320] [drm:r100_cp_init [radeon]] *ERROR* Failed to load firmware!
[ 17.161650] radeon 0000:00:10.0: failed initializing CP (-2).
[ 17.161657] radeon 0000:00:10.0: Disabling GPU acceleration
[ 17.161669] [drm] radeon: cp finalized
[ 17.161841] [drm] radeon: cp finalized
[ 17.163286] [drm] radeon: ttm finalized
[ 17.163383] radeon 0000:00:10.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0x0000
[ 17.163413] radeon 0000:00:10.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0x0000
[ 17.163813] [drm:radeon_get_bios [radeon]] *ERROR* Unable to locate a BIOS ROM
[ 17.163873] radeon 0000:00:10.0: VRAM: 128M 0x0000000098000000 - 0x000000009FFFFFFF (32M used)
[ 17.163883] radeon 0000:00:10.0: GTT: 512M 0x0000000078000000 - 0x0000000097FFFFFF
[ 17.164446] [drm] radeon: 32M of VRAM memory ready
[ 17.164452] [drm] radeon: 512M of GTT memory ready.
[ 17.177609] radeon 0000:00:10.0: WB disabled
[ 17.177630] radeon 0000:00:10.0: fence driver on ring 0 use gpu addr 0x0000000078000000 and cpu addr 0xcd7ca000
[ 17.177744] [drm] radeon: irq initialized.
[ 17.177936] radeon 0000:00:10.0: Direct firmware load for radeon/R100_cp.bin failed with error -2
[ 17.177951] radeon_cp: Failed to load firmware "radeon/R100_cp.bin"
[ 17.179200] [drm:r100_cp_init [radeon]] *ERROR* Failed to load firmware!
[ 17.179209] radeon 0000:00:10.0: failed initializing CP (-2).
[ 17.179216] radeon 0000:00:10.0: Disabling GPU acceleration
[ 17.179227] [drm] radeon: cp finalized
[ 17.902067] [drm] radeon legacy LVDS backlight initialized
[ 19.904700] radeon 0000:00:10.0: fb0: radeondrmfb frame buffer device
[ 19.931667] [drm] Initialized radeon 2.50.0 20080528 for 0000:00:10.0 on minor 0
xorg.conf file contents (automatically generated by Xorg -configure):
Section "ServerLayout"
Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "Files"
ModulePath "/usr/lib/xorg/modules"
FontPath "${prefix}/share/fonts/X11/misc/"
FontPath "${prefix}/share/fonts/X11/TTF/"
FontPath "${prefix}/share/fonts/X11/OTF/"
FontPath "${prefix}/share/fonts/X11/Type1/"
FontPath "${prefix}/share/fonts/X11/100dpi/"
FontPath "${prefix}/share/fonts/X11/75dpi/"
EndSection
Section "Module"
Load "glx"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5 6 7"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
EndSection
Section "Device"
### Available Driver options are:-
### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
### <string>: "String", <freq>: "<f> Hz/kHz/MHz",
### <percent>: "<f>%"
### [arg]: arg optional
#Option "Accel" # [<bool>]
#Option "SWcursor" # [<bool>]
#Option "EnablePageFlip" # [<bool>]
#Option "ColorTiling" # [<bool>]
#Option "ColorTiling2D" # [<bool>]
#Option "RenderAccel" # [<bool>]
#Option "SubPixelOrder" # [<str>]
#Option "AccelMethod" # <str>
#Option "ShadowPrimary" # [<bool>]
#Option "EXAVSync" # [<bool>]
#Option "EXAPixmaps" # [<bool>]
#Option "ZaphodHeads" # <str>
#Option "SwapbuffersWait" # [<bool>]
#Option "DeleteUnusedDP12Displays" # [<bool>]
#Option "DRI3" # [<bool>]
#Option "DRI" # <i>
#Option "TearFree" # [<bool>]
Identifier "Card0"
Driver "radeon"
BusID "PCI:0:16:0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
SubSection "Display"
Viewport 0 0
Depth 1
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 4
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 8
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 15
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 16
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection
Thanks for your attention,
Nicolás Colla
nicolascolla@mail.ru