Bug 17081

Description of problem:
I have just installed kenrel 4.1.8 from updates in MGA5, and the screen is producing artifacts. In particular short pairs of lines on the screen (maybe about 30 pixels long, and in pairs separated by about 5 pixels.) withing the lines the pixels seem to be displaced from where they should be. (On one boot, there were a huge bunch of of them in the center of the screen, so the mageia word on the bootup had two images, displaced about 1/4 of a character width from each other) Usually they are short. and they occur on top of a Konsole window-- the location is usually toward the edge-- left or right-- of the window. If a word is typed at the location that word's pixels get fragmented. This is extremely annoying. 

When I installed kenel 3.19.8, the problem seems to have disappeared, so it definitely seems to have something to do with the kernel graphics driver.


Version-Release number of selected component (if applicable): 
The system was updated on Nov 1 (urpmi --auto-select --update) 
But it seems to be the kernel 4.1.8 that is causing the problem.

How reproducible: I rebooted 5 times with the 4.1.8 kernel, and it occured each time. One pair of lines obscured a couple of desktop icons on the left hand side. 
And the others occured when I opened a Konsole. The location of the Konsole line pairs depended on how large I made the window for the konsole-- hopping around discontinuously while I resized the window. 

 


Steps to Reproduce: Boot 4.1.8 kernel. Sometimes the spash screen was corrupted. Sometimes it waited until I logged on and booted into X from the kdm screen and then my home desktop was corrupted as above consistantly.
 


Output of lspci

00:00.0 Host bridge: Intel Corporation 82G35 Express DRAM Controller (rev 03)
00:02.0 VGA compatible controller: Intel Corporation 82G35 Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation 82G35 Express Integrated Graphics Controller (rev 03)
00:19.0 Ethernet controller: Intel Corporation 82566DC Gigabit Network Connection (rev 02)
00:1a.0 USB controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #4 (rev 02)
00:1a.1 USB controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #5 (rev 02)
00:1a.7 USB controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #2 (rev 02)
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 1 (rev 02)
00:1c.1 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 2 (rev 02)
00:1c.2 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 3 (rev 02)
00:1d.0 USB controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #1 (rev 02)
00:1d.1 USB controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #2 (rev 02)
00:1d.2 USB controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #3 (rev 02)
00:1d.7 USB controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #1 (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev f2)
00:1f.0 ISA bridge: Intel Corporation 82801HB/HR (ICH8/R) LPC Interface Controller (rev 02)
00:1f.2 IDE interface: Intel Corporation 82801H (ICH8 Family) 4 port SATA Controller [IDE mode] (rev 02)
00:1f.3 SMBus: Intel Corporation 82801H (ICH8 Family) SMBus Controller (rev 02)
00:1f.5 IDE interface: Intel Corporation 82801HR/HO/HH (ICH8R/DO/DH) 2 port SATA Controller [IDE mode] (rev 02)
03:00.0 IDE interface: JMicron Technology Corp. JMB368 IDE controller
04:03.0 Communication controller: MosChip Semiconductor Technology Ltd. PCI 9835 Multi-I/O Controller (rev 01)
04:05.0 FireWire (IEEE 1394): LSI Corporation FW322/323 [TrueFire] 1394a Controller (rev 70)


Video monitor Acer H236HL -- driven with VGA input. 


Reproducible: 

Steps to Reproduce: