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SubjectOOPS in APM 2.4.18-pre4 with i830MP agpgart
Dear all,

On november 27th, Nicolas Aspert was so kind as to post a modification
to agpgart, which catters for detection of the Intel i830MP.

The patch was included in 2.4.18-pre2.

Unfortunately, loading agpgart yields an oops when APM ("apm -s") is
invoked, both in terminal and in X. APM functions perfectly when agpgart
is absent.



The APM oops log :


Oops: 0000
CPU: 0
EIP: 0010:[<00000000>] Not tainted
EFLAGS: 00010246
eax: 00000000 ebx: dde76220 ecx: 00000000 edx: 00000000
esi: 00000003 edi: 00000000 ebp: 00000000 esp: c181bf4c
ds: 0018 es: 0018 ss: 0018
Process kapm-idled (pid: 3, stackpage=c181b000)
Stack: e29d0f06 c0121e00 dde76220 00000000 00000003 dde7623c 00000064
dde76220
c0121eb6 dde76220 00000000 00000003 00000002 00000064 00000064
0008e000
c0110f0e 00000000 00000003 00000002 c0111183 00000002 c181a000
c011131b
Call Trace: [<e29d0f06>] [<c0121e00>] [<c0121eb6>] [<c0110f0e>] [<c0111183>]
[<c011131b>] [<c0111bfa>] [<c0140018>] [<c0105000>] [<c0105726>]
[<c01119a0>]

Code: Bad EIP value.
Jan 18 10:06:01 localhost kernel: Unable to handle kernel NULL pointer
dereference at virtual address 00000000
Jan 18 10:06:01 localhost kernel: printing eip:
Jan 18 10:06:01 localhost kernel: 00000000
Jan 18 10:06:01 localhost kernel: *pde = 00000000
Jan 18 10:06:01 localhost kernel: Oops: 0000
Jan 18 10:06:01 localhost kernel: CPU: 0
Jan 18 10:06:01 localhost kernel: EIP: 0010:[<00000000>] Not tainted
Jan 18 10:06:01 localhost kernel: EFLAGS: 00010246
Jan 18 10:06:01 localhost kernel: eax: 00000000 ebx: dde76220 ecx:
00000000 edx: 00000000
Jan 18 10:06:01 localhost kernel: esi: 00000003 edi: 00000000 ebp:
00000000 esp: c181bf4c
Jan 18 10:06:01 localhost kernel: ds: 0018 es: 0018 ss: 0018
Jan 18 10:06:01 localhost kernel: Process kapm-idled (pid: 3,
stackpage=c181b000)
Jan 18 10:06:01 localhost kernel: Stack: e29d0f06 c0121e00 dde76220
00000000 00000003 dde7623c 00000064 dde76220
Jan 18 10:06:01 localhost kernel: c0121eb6 dde76220 00000000
00000003 00000002 00000064 00000064 0008e000
Jan 18 10:06:01 localhost kernel: c0110f0e 00000000 00000003
00000002 c0111183 00000002 c181a000 c011131b
Jan 18 10:06:01 localhost kernel: Call Trace: [<e29d0f06>]
[pm_send+64/112] [pm_send_all+70/160] [send_event+30/112]
[check_events+259/416]
Jan 18 10:06:01 localhost kernel: Call Trace: [<e29d0f06>] [<c0121e00>]
[<c0121eb6>] [<c0110f0e>] [<c0111183>]
Jan 18 10:06:01 localhost kernel: [apm_mainloop+123/176]
[apm+602/624] [posix_lock_file+264/1376] [_stext+0/48]
[kernel_thread+38/48] [apm+0/624]
Jan 18 10:06:01 localhost kernel: [<c011131b>] [<c0111bfa>]
[<c0140018>] [<c0105000>] [<c0105726>] [<c01119a0>]
Jan 18 10:06:01 localhost kernel:
Jan 18 10:06:01 localhost kernel: Code: Bad EIP value.



Sincerely,


Didier Moens
-----
RUG/VIB - Dept. Molecular Biomedical Research - Core IT
tel ++32(9)2645309 fax ++32(9)2645348
http://www.dmb.rug.ac.be


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