https://bugs.freedesktop.org/show_bug.cgi?id=75649
Priority: medium Bug ID: 75649 Assignee: dri-devel@lists.freedesktop.org Summary: Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470 Severity: normal Classification: Unclassified OS: Linux (All) Reporter: tderensis@gmail.com Hardware: x86 (IA32) Status: NEW Version: 10.0 Component: Drivers/Gallium/r600 Product: Mesa
Screen flickering and horizontal black/white lines mixed in with output on redraw. This only happens when using HDMI output to a single external 1920x1080 monitor and not when using dual monitors or the single laptop screen. If the screen is static or I move the mouse over a single color background, no glitching happens. It seems that the more that needs to get redrawn in the frame, the worse it gets.
I'm not sure how long this has been a problem because I rarely use a single monitor. I'll report back when mesa 10.1 is released on Arch.
System info from Phoronix Test Suite: Hardware: Processor: Intel Core 2 Duo P8400 @ 2.27GHz (2 Cores), Motherboard: Sony VAIO, Chipset: Intel Mobile 4 MCH + ICH9M, Memory: 3072MB, Disk: 320GB Western Digital WD3200BEKT-7, Graphics: AMD Mobility Radeon HD 3450/3470 256MB (680/800MHz), Audio: Realtek ALC262, Monitor: DELL ST2220L, Network: Marvell 88E8055 PCI-E Gigabit + Qualcomm Atheros AR928X Wireless
Software: OS: Linux, Kernel: 3.13.5-1-ARCH (x86_64), Desktop: Cinnamon 2.0.14, Display Server: X Server 1.15.0, Display Driver: radeon 7.3.0, OpenGL: 3.1 Mesa 10.0.3 Gallium 0.4, Compiler: GCC 4.8.2 20140206 + Clang 3.4 + LLVM 3.4, File-System: ext4, Screen Resolution: 1920x1080