X and 2.4.0 problem (video bios probing?)

X and 2.4.0 problem (video bios probing?)

[Kevin Fenzi]

Hi there. Having been running the 2.4.0-test kernels on my laptop, I
quickly upgraded to 2.4.0 when it came out. A problem quickly arose: 

X won't start. 

Under 2.4.0-test12 it works fine. 

Under 2.4.0 it exits after trying to load the int10 module...

from 2.4.0-test12 (and all others):

(II) Loading sub module "int10"
(II) LoadModule: "int10"
(II) Loading /usr/X11R6/lib/modules/linux/libint10.a
(II) Module int10: vendor="The XFree86 Project"
        compiled for 4.0.1a, module version = 1.0.0
        ABI class: XFree86 Video Driver, version 0.2
(II) ATI(0): Primary V_BIOS segment is: 0xc000
(II) Loading sub module "ddc"
(II) LoadModule: "ddc"
(II) Loading /usr/X11R6/lib/modules/libddc.a
(II) Module ddc: vendor="The XFree86 Project"
        compiled for 4.0.1a, module version = 1.0.0
        ABI class: XFree86 Video Driver, version 0.2
(II) Loading sub module "vbe"
(II) LoadModule: "vbe"
(II) Loading /usr/X11R6/lib/modules/libvbe.a
(II) Module vbe: vendor="The XFree86 Project"
        compiled for 4.0.1a, module version = 1.0.0
        ABI class: XFree86 Video Driver, version 0.2
(II) ATI(0): VESA Bios detected
(II) ATI(0): VESA VBE Version 2.0
(II) ATI(0): VESA VBE Total Mem: 8128 kB
(II) ATI(0): VESA VBE OEM: ATI MACH64
(II) ATI(0): VESA VBE OEM Software Rev: 1.0
(II) ATI(0): VESA VBE OEM Vendor: ATI Technologies Inc.
(II) ATI(0): VESA VBE OEM Product: MACH64RM
(II) ATI(0): VESA VBE OEM Product Rev: 01.00
(II) ATI(0): VESA VBE DDC supported
(II) ATI(0): VESA VBE DDC Level none
(II) ATI(0): VESA VBE DDC transfer in appr. 2 sec.
(==) ATI(0): Chipset:  "ati".
(--) ATI(0): ATI 3D Rage Mobility graphics controller detected.
(--) ATI(0): Chip type 4C4D "LM", version 4, foundry TSMC, class 0, revision 0x01.
(--) ATI(0): AGP bus interface detected;  block I/O base is 0x2000.
(--) ATI(0): ATI Mach64 adapter detected.
(--) ATI(0): Internal RAMDAC (subtype 1) detected.
(--) ATI(0): 1400x1050 panel (ID 6) detected.
(--) ATI(0): Panel model IBM ITSX93.
(--) ATI(0): Panel clock is 107.859 MHz.

under 2.4.0 (final):

(II) Setting vga for screen 0.
(II) Loading sub module "int10"
(II) LoadModule: "int10"
(II) Loading /usr/X11R6/lib/modules/linux/libint10.a
(II) Module int10: vendor="The XFree86 Project"
        compiled for 4.0.1a, module version = 1.0.0
        ABI class: XFree86 Video Driver, version 0.2
(EE) ATI(0): Unable to initialise int10 interface.
(II) UnloadModule: "ati"
(II) UnloadModule: "int10"
(II) Unloading /usr/X11R6/lib/modules/linux/libint10.a
(EE) Screen(s) found, but none have a usable configuration.

Fatal server error:
no screens found

Things I have ruled out:

- Compiled with redhat 7's gcc 2.96 snapshot, and also with kgcc. No
diffrence. 

- did a cat /proc/pci, lspci, and cat /proc/inturrupts and compaired
2.4.0 and 2.4.0-test12 and they were identical. 

- Without changing anything besides the kernel X works. If I am in
2.4.0-test12 it's fine, if I am in 2.4.0 (final) it fails. 

Further debugging, requests for logs, patches, or ideas are welcome. 

This laptop is a dell inspiron 5000 (not 5000e). It has worked just
fine with X until now. It's a redhat 7 + all errata. It has
XFree86-4.0.1a on it. 

thanks for any suggestions. 

kevin
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Re: X and 2.4.0 problem (video bios probing?)

[Alan Cox]

> (II) Loading /usr/X11R6/lib/modules/linux/libint10.a
> (II) Module int10: vendor="The XFree86 Project"
>         compiled for 4.0.1a, module version = 1.0.0
>         ABI class: XFree86 Video Driver, version 0.2
> (EE) ATI(0): Unable to initialise int10 interface.

Thats the critical bit but it isnt directly a kernel thing. Im not sure
why it should have failed. Do you have different .config options (eg ATI fb
options ?)

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Re: X and 2.4.0 problem (video bios probing?)

[Kevin Fenzi]

>>>>> "Alan" == Alan Cox <alan@lxorguk.ukuu.org.uk> writes:

>> (II) Loading /usr/X11R6/lib/modules/linux/libint10.a (II) Module
>> int10: vendor="The XFree86 Project" compiled for 4.0.1a, module
>> version = 1.0.0 ABI class: XFree86 Video Driver, version 0.2 (EE)
>> ATI(0): Unable to initialise int10 interface.

Alan> Thats the critical bit but it isnt directly a kernel thing. Im
Alan> not sure why it should have failed. Do you have different
Alan> .config options (eg ATI fb options ?)

nope. I did do a 'make oldconfig' after patching to 2.4.0 (final), but
all the other options are the same. 

I was not using the ATI fb in either case. I had it built as a module,
"ATI Rage 128 display support (EXPERIMENTAL)" (that I didn't load)
and I did have "VESA VGA graphics console" enabled. 

kevin
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Re: X and 2.4.0 problem (video bios probing?) (more info)

[Kevin Fenzi]

>>>>> "Alan" == Alan Cox <alan@lxorguk.ukuu.org.uk> writes:

>> (II) Loading /usr/X11R6/lib/modules/linux/libint10.a (II) Module
>> int10: vendor="The XFree86 Project" compiled for 4.0.1a, module
>> version = 1.0.0 ABI class: XFree86 Video Driver, version 0.2 (EE)
>> ATI(0): Unable to initialise int10 interface.

Alan> Thats the critical bit but it isnt directly a kernel thing. Im
Alan> not sure why it should have failed. Do you have different
Alan> .config options (eg ATI fb options ?)

By the process of elimination, I have determined that my problem
appears in the 2.4.0-test13-pre3 patch. 

2.4.0-test13-pre2 X works fine, in pre3 and beyond it fails. 

Anyone able to spot anything in the pre3 patch that might be causing
this? 

thanks, 

kevin
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Re: X and 2.4.0 problem (video bios probing?) (SOLUTION!)

[Kevin Fenzi]

Duh. 

I figured out the problem. In 2.4.0-test13-pre3 is the introduction of
the shmall sysctl. I had installed a package called powertweak a while
back. It looks like powertweak sets any sysctl it doesn't know to 0. 

So, the problem was that there was no shared memory for X. ;( 

I set that up to a reasonable level and all is well. 

sorry for the wild goose chase. :(

kevin
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