[Bug 76554] [gm45 regression] [drm:init_ring_common]: *ERROR* render ring initialization failed

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76554

--- Comment #73 from Martin Bednar <serafean at gmail.com> ---
Hi,

I'm hitting this reliably on every resume on 3.15.5. (libdrm 2.4.54, mesa
10.2.3)
relevant dmesg output : 
juil. 11 17:28:23 Nemmerle kernel: [drm:i965_irq_handler] *ERROR* pipe B
underrun
juil. 11 17:29:52 Nemmerle kernel: [drm:init_ring_common] *ERROR* render ring
initialization failed ctl 0001f001 head 00000268 tail 00000000 start 007510
juil. 11 17:29:52 Nemmerle kernel: dpm_run_callback(): pci_pm_resume+0x0/0xb0
returns -5
juil. 11 17:29:52 Nemmerle kernel: PM: Device 0000:00:02.0 failed to resume
async: error -5

Kwin crashes really bad after this happens...

Not sure if the pipe B underrun is related, as that happens even without
resuming.
This is on : 
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset
Integrated Graphics Controller (rev 07)
If I can help in any way, let me know...

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