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- ----- 1899 -----
- December
May 2011
- 2 participants
- 127 discussions
21 May '11
Hi,
according to the comments in my Xorg.0.log, here is my notification to
you that the radeonhd driver has problems with my card. I already used
nomodeset as kernel parameter on startup.
Problem: The video performance is extremely low, virtually unusable
(especially 2D performance). I have to switch to AMD's proprietary driver.
lspci:
01:00.0 VGA compatible controller: ATI Technologies Inc R600 [Radeon HD
2900 Series] (prog-if 00 [VGA controller])
Subsystem: ATI Technologies Inc Sapphire Radeon HD 2900 XT
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at e0000000 (64-bit, prefetchable) [size=256M]
Memory at f5000000 (64-bit, non-prefetchable) [size=64K]
I/O ports at a000 [size=256]
[virtual] Expansion ROM at f4000000 [disabled] [size=128K]
Capabilities: [50] Power Management version 3
Capabilities: [58] Express Legacy Endpoint, MSI 00
Capabilities: [a0] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1
Len=010 <?>
[ 19.117] (EE) KMS is disabled. This is good for us, because RADEONHD
conflicts with KMS.
...
[ 19.124] (II) RADEONHD(0): Card not in database:
0x9400:0x1002:0x3000; using generic modesetting.
[ 19.124] If - and only if - your card does not work or does not
work optimally
please contact radeonhd(a)opensuse.org to help rectify this.
Use the subject: 0x9400:0x1002:0x3000: <name of board>
and *please* describe the problems you are seeing
in your message.
...
[ 19.339] (II) AIGLX: Screen 0 is not DRI2 capable
[ 19.339] (II) AIGLX: Screen 0 is not DRI capable
Michael
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1
0
[Bug 20593] New: radeonhd driver generates unaligned traps on Alpha
by bugzilla-daemon@freedesktop.org 16 May '11
by bugzilla-daemon@freedesktop.org 16 May '11
16 May '11
http://bugs.freedesktop.org/show_bug.cgi?id=20593
Summary: radeonhd driver generates unaligned traps on Alpha
Product: xorg
Version: git
Platform: Alpha
OS/Version: Linux (All)
Status: NEW
Severity: minor
Priority: low
Component: Driver/radeonhd
AssignedTo: lverhaegen(a)suse.de
ReportedBy: mcree(a)orcon.net.nz
QAContact: xorg-team(a)lists.x.org
CC: mcree(a)orcon.net.nz
The radeonhd driver generates unaligned traps on Alpha architecture. These are
not a show stopper, but do incur very inefficient memory accesses via kernel
traps, and pollute the kernel logs with annoying messages.
Using radeonhd at git df71658688e47614a3f660c28ac1dc77970eb491
But the version is irrelevant as the misaligned memory accesses have been there
for a long time - I have been too lazy to report them until now.
>From dmesg:
X(2015): unaligned trap at 0000020000903088: 000002000098c5d7 28 1
X(2015): unaligned trap at 0000020000903088: 000002000098c5df 28 1
X(2015): unaligned trap at 0000020000903088: 000002000098c5e7 28 1
X(2015): unaligned trap at 0000020000903088: 0000020000989771 28 1
Connecting gdb to the running X process reveals the culprit:
(gdb) list *0x0000020000903088
0x20000903088 is in GetParametersDirect32 (AtomBios/CD_Operations.c:441).
436 }
437
438 UINT32 GetParametersDirect32(PARSER_TEMP_DATA STACK_BASED *
pParserTempData)
439 {
440 pParserTempData->CD_Mask.SrcAlignment=alignmentDword;
441
pParserTempData->Index=*(UINT32*)pParserTempData->pWorkingTableData->IP;
442 pParserTempData->pWorkingTableData->IP+=sizeof(UINT32);
443 return pParserTempData->Index;
444 }
445
Line 441 is a 32bit (long word) access. The address dereferenced is not
aligned to a 32bit boundary for an unaligned trap to occur.
The ati driver is worse. It coughs up unaligned traps from
GetParametersDirect16() and GetParametersRegister() too, but I haven't seen
these from radeonhd.
Cheers
Michael.
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