https://bugs.freedesktop.org/show_bug.cgi?id=40221
Summary: Evergreen: Frequent pixmap corruption on >=3.0 kernels
Product: xorg
Version: 7.6
Platform: x86-64 (AMD64)
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Driver/Radeon
AssignedTo: [email protected]
ReportedBy: [email protected]
QAContact: [email protected]
Created an attachment (id=50369)
--> (https://bugs.freedesktop.org/attachment.cgi?id=50369)
X.org log
This is related to Bug #38530, but deserves its own report.
Basically, after some time, pixmaps show extreme corruption. Mostly they will
be blank in the lower half, sometimes more will be corrupt, but it is always a
"clean cut" with an unaffected upper portion and a completely garbled lower
portion. Sometimes, a portion of an affected pixmap shows uninitialised or old
content. This always happens after some time of normal use, and running
applications deteriorate over time.
I have also brought it up on the KDE BTS since it mostly affected KDE
applications, but right now the first thing to go was something in Firefox.
https://bugs.kde.org/show_bug.cgi?id=279855
This happens on all kernels that support blitting on Evergreen hardware.
Manually reverting the commit which introduced that functionality "fixes"
things, but introduces the freezes from the old bug.
The hardware is very likely fine, since it does not show any corruption under
Windows even when running graphically complex games for extended periods of
time.
For screenshots illustrating the corruption visit the linked bug reports.
>From the logs:
Xorg.0.log shows:
> (II) RADEON(0): VRAM usage limit set to 219499K
but dmesg shows:
> radeon 0000:05:00.0: VRAM: 2048M 0x0000000000000000 - 0x000000007FFFFFFF
> (2048M used)
> radeon 0000:05:00.0: GTT: 512M 0x0000000080000000 - 0x000000009FFFFFFF
> [drm] Detected VRAM RAM=2048M, BAR=256M
> [drm] RAM width 256bits DDR
> [TTM] Zone kernel: Available graphics memory: 8235644 kiB.
> [TTM] Zone dma32: Available graphics memory: 2097152 kiB.
> [TTM] Initializing pool allocator.
> [drm] radeon: 2048M of VRAM memory ready
> [drm] radeon: 512M of GTT memory ready.
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