Please consider reverting commit 3e22920fbd0005927bc41f71daeb056a0f4def82 by title of: drm/radeon: consolidate vga and dvi get_modes functions (v2)
I have bisected this as the culprit for my PowerMac 7,3 crashing back into OpenFirmware very early at boot with an invalid memory access. The diagnostic data printed is: %SSR0: 0000000.00c00000 %SSR1: 1000000.0083030
Regards, Tony V.
On Sat, 2014-08-30 at 18:37 +0100, Tony Vroon wrote:
Please consider reverting commit 3e22920fbd0005927bc41f71daeb056a0f4def82 by title of: drm/radeon: consolidate vga and dvi get_modes functions (v2)
I have bisected this as the culprit for my PowerMac 7,3 crashing back into OpenFirmware very early at boot with an invalid memory access. The diagnostic data printed is: %SSR0: 0000000.00c00000 %SSR1: 1000000.0083030
This is weird. The above means it crashed very early, such as in prom_init. I fail to see how the above commit can possibly relate to that in any way...
Have you verified that reverting it actually helps ?
Cheers, Ben.
On 30/08/14 22:56, Benjamin Herrenschmidt wrote:
This is weird. The above means it crashed very early, such as in prom_init. I fail to see how the above commit can possibly relate to that in any way...
I was dubious as well, but this git bisection process is held up as the one and only truth in kernel troubleshooting and I followed it to the letter.
Have you verified that reverting it actually helps ?
I just tried it on a clean tree and indeed, it did not help as you expected.
So, Alex, sorry to waste your time.
Ben, other ideas?
Regards,
On Sat, 2014-08-30 at 23:38 +0100, Tony Vroon wrote:
On 30/08/14 22:56, Benjamin Herrenschmidt wrote:
This is weird. The above means it crashed very early, such as in prom_init. I fail to see how the above commit can possibly relate to that in any way...
I was dubious as well, but this git bisection process is held up as the one and only truth in kernel troubleshooting and I followed it to the letter.
Have you verified that reverting it actually helps ?
I just tried it on a clean tree and indeed, it did not help as you expected.
So, Alex, sorry to waste your time.
Ben, other ideas?
I'll have to experiment on my own G5's next week
Cheers, Ben.
dri-devel@lists.freedesktop.org
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Benjamin Herrenschmidt -
Tony Vroon