[REGRESSION] v4.17-rc4: xgalaga fails to start in fullscreen (default) mode

From: Vito Caputo
Date: Mon May 21 2018 - 14:58:42 EST


Hello all,

4.17-rc4 (my latest kernel ATM) consistently fails to start xgalaga
without -window. I will try find time to build the latest rc this
evening.

> ~$ xgalaga
> X Error of failed request: BadValue (integer parameter out of range for operation)
> Major opcode of failed request: 152 (XFree86-VidModeExtension)
> Minor opcode of failed request: 10 (XF86VidModeSwitchToMode)
> Value in failed request: 0x120004e
> Serial number of failed request: 199
> Current serial number in output stream: 203

Haven't dug into this much yet, only did a perfunctory check by booting into a
few older kernels (4.11, 4.12, 4.16) and the problem is absent on all of them.
It appears to be a 4.17-specific regression right now.

Also observed, though this is surely a different regression, the game
ran like molasses with -window, showing some prominent kworkers in top:

692 vc 20 0 312852 45884 20556 R 32.0 1.2 0:08.69 Xorg
102 root 20 0 0 0 0 R 11.2 0.0 0:01.43 kworker/1:3
94 root 20 0 0 0 0 I 8.9 0.0 0:00.83 kworker/0:2
696 vc 20 0 39948 4124 2912 S 1.0 0.1 0:05.57 vwm
902 vc 30 10 46372 4144 3500 S 0.7 0.1 0:00.08 xgalaga
891 vc 30 10 44924 3868 3156 R 0.3 0.1 0:00.09 top
903 vc 30 10 4180 1184 1100 S 0.3 0.0 0:00.01 xgal.sndsrv.oss

The windowed performance issue was observed on the older kernels tested
as well, though 4.11 felt better and didn't have the busy kworkers.

I have not attempted to play xgalaga for ages, but it used to be perfectly
playable on this machine in windowed mode when I last did.

Machine is the venerable Thinkpad X61s, 1.8Ghz, Debian 9, config attached.

Regards,
Vito Caputo

Attachment: 4.17-rc4-config.gz
Description: application/gzip