https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208357
Bug ID: 208357
Summary: i915kms do not work on mobile IvyBridge after r296719
Product: Base System
Version: 11.0-CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: freebsd-bugs@FreeBSD.org
Reporter: w...@cicgroup.ru
Created attachment 168725
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=168725&action=edit
verbose boot log
On my IvyBridge laptop (Acer Aspire S7-191) vt console cannot output anything
to screen before agp(4) is loaded.
r296719 removed SandyBridge support from agp(4) so laptop becomes unusable. It
can boot multiuser but screen freezes at one point during a boot.
Reverting r296719 makes things working again.
following is some parts of verbose boot log (full listing is attached) of pre
r296719 kernel with agp(4) compiled as module and loaded from command prompt:
random: harvesting attach, 8 bytes (4 bits) from pci_link7
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pcib0: decoding 5 range 0-0xfe
pcib0: decoding 4 range 0-0xcf7
pcib0: decoding 4 range 0xd00-0xffff
pcib0: decoding 3 range 0xa0000-0xbffff
pcib0: decoding 3 range 0x3fa00000-0xfeafffff
pci0: <ACPI PCI bus> on pcib0
pci0: domain=0, physical bus=0
found-> vendor=0x8086, dev=0x0154, revid=0x09
domain=0, bus=0, slot=0, func=0
class=06-00-00, hdrtype=0x00, mfdev=0
cmdreg=0x0006, statreg=0x2090, cachelnsz=0 (dwords)
lattimer=0x00 (0 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
found-> vendor=0x8086, dev=0x0166, revid=0x09
domain=0, bus=0, slot=2, func=0
class=03-00-00, hdrtype=0x00, mfdev=0
cmdreg=0x0007, statreg=0x0090, cachelnsz=0 (dwords)
lattimer=0x00 (0 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
intpin=a, irq=7
powerspec 2 supports D0 D3 current D0
MSI supports 1 message
map[10]: type Memory, range 64, base 0x50000000, size 22, enabled
pcib0: allocated type 3 (0x50000000-0x503fffff) for rid 10 of pci0:0:2:0
map[18]: type Prefetchable Memory, range 64, base 0x40000000, size 28,
enabled
>>>>>>>>>>>>>>>>>>>>>>>>>>
Screen updating stops HERE
>>>>>>>>>>>>>>>>>>>>>>>>>>
pci0: pci0:0:2:0 bar 0x18 failed to allocate
map[20]: type I/O Port, range 32, base 0x2000, size 6, enabled
pcib0: allocated type 4 (0x2000-0x203f) for rid 20 of pci0:0:2:0
pcib0: matched entry for 0.2.INTA
pcib0: slot 2 INTA hardwired to IRQ 16
>>>>>>>>>>>>>>>>>>>>>>>>>>
Some output skipped
>>>>>>>>>>>>>>>>>>>>>>>>>>
SMP: passed TSC synchronization test
Timecounter "TSC" frequency 1795968296 Hz quality 1000
Trying to mount root from zfs:zroot/ROOT/default []...
battery0: battery initialization done, tried 1 times
start_init: trying /sbin/init
>>>>>>>>>>>>>>>>>>>>>>>>>>
Now I blindly type "kldload agp" from command prompt
and screen updating starts again
>>>>>>>>>>>>>>>>>>>>>>>>>>
agp0: <IvyBridge mobile GT2 IG> on vgapci0
pcib0: allocated type 3 (0x80000000-0x8fffffff) for rid 18 of vgapci0
vgapci0: Lazy allocation of 0x10000000 bytes rid 0x18 type 3 at 0x80000000
agp0: aperture size is 256M, detected 65532k stolen memory
agp0: AGP_SNB_GFX_MODE: 00000000
agp0: AGP_SNB_GCC1: 0x0211
agp0: Mappable GTT entries: 65536
agp0: Total GTT entries: 524288
random: harvesting attach, 8 bytes (4 bits) from agp0
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