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- 5. _K_n_o_w_n__P_r_o_b_l_e_m_s__a_n_d__W_o_r_k_a_r_o_u_n_d_s
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- This chapter discusses known problems in IRIX 6.5 and ways
- to work around them.
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- +o Programs built o32 running on desktop platforms
- released since Irix 6.2 (O2 and OCTANEs) and with
- default system configuration, may be returned values of
- 0x80000000 for resource limits RLIMIT_DATA and
- RLIMIT_VMEM from a call to getlimit(). However,
- setrlimit() will reject this value as invalid.
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- o32 programs do not suffer from this problem on any
- other platform. n32 programs are not affected by this
- problem.
-
- The workaround is to use systune to reduce the
- associated default values.
-
- This problem affects systems with CPU types IP26, IP28,
- IP30, or IP32.
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- +o The Qlogic SCSI controller is not capable of operating
- at synchronous speeds of 300ns or more per cycle. If
- you have a slow scsi device that is capable of
- synchronous negotiations but at 300 ns period or
- greater you must disable synchronous negotiations for
- that device. You can disable sync for the whole bus by
- using the DEVICE_ADMIN directive in
- /var/sysgen/system/irix.sm. For example, to disable
- sync on the external SCSI bus on an OCTANE system, add
- the following line to irix.sm and then run
- autoconfig(1M) and reboot the system:
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- DEVICE_ADMIN: /hw/node/xtalk/15/pci/1/scsi_ctlr/0 ql_sync_enable=0
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- +o The XFS Guaranteed Rate I/O (GRIO) feature contained in
- eoe.sw.xfsrt can be used to access "real-time" files.
- The GRIO API has undergone changes since IRIX 6.2, and
- are described in the grio(1M), grio_bandwidth(1M),
- grio(5), grio_disks(4) and associated man pages.
-
- +o Deleting ip aliases can cause kernel panics. The
- workaround is not to delete them.
-
- +o The system automatically mounts a pseudo-filesystem
- called /_h_w. This file system should never be unmounted
- (i.e. _u_m_o_u_n_t -_a should be used with caution). The
- command /_e_t_c/_m_n_t_h_w_g_f_s can be used to remount /_h_w if
- necessary. See _h_w_g_f_s(4) for more information.
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- +o Use of file-locking operations on fifos can cause a
- panic.
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- +o fsr (the EFS filesystem reoganizer) will get into an
- infinite loop when it encounters an EFS filesystem on
- an XLV volume. You can avoid the problem by removing
- the rw option from the fstab entry for the affected
- filesystem(s), see the fsr(1M) manual page. This
- disables fsr for the filesystem.
-
- +o OCTANE and Origin/Onyx2 systems have IBM(R) PC/AT(tm)-
- like DB-9 male serial port connectors. Some existing
- serial devices, such as Dial and Button boxes, have
- male DB-9 serial connectors. These connectors are
- designed for the DB-9 female serial port connectors
- found on the CHALLENGE and Onyx systems. The
- difference is not merely in the gender of the
- connectors; the pinout is different, and a conversion
- cable is required to connect devices with the older
- connectors to the newer systems. See the serial(7) man
- page for the pinouts of the CHALLENGE/Onyx and
- OCTANE/Origin/Onyx2 connectors, which can be used to
- create a conversion cable.
-
- Recently shipped versions of some devices (including
- Dial and Button boxes) may have PC/AT(tm)-like DB-9
- female serial port connectors that will connect
- directly to OCTANE and Origin/Onyx2 systems.
-
- +o OCTANE Duo systems will need check to make sure the
- appropriate Xservers file is on the system. Use
- "versions changed" (see versions(1M)) to check for the
- previous version of Xservers (will be Xservers.O).
- Compare the Xservers.O with the new Xservers.2key to
- check for any changes or additions. Without the
- appropriate Xservers file the second head on the OCTANE
- Duo system will not be activated. Please see your
- OCTANE Duo Installation Guide for additional details.
-
- +o On Onyx2, Origin2000, and OCTANE systems with Reality,
- InfinteReality, InfiniteReality2, SI, SSI, or MXI
- graphics, real-time determinism breaks when the X
- server is terminated. Avoid terminating the X server
- when real-time determinism is required.
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- If the X server must be terminated while real-time
- deteminism is required, a workaround for Onyx2 and
- Origin2000 systems with Reality and InfiniteReality,
- and InfiniteReality2 graphics can be used. Set the
- non-volitile RAM's console variable to "d," directing
- console output out the console serial port instead of
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- the graphics display.
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- No workaround exists for OCTANE systems and Origin2000
- systems with SI, SSI, or MXI graphics.
-
- +o Irix 6.5.3 and 6.5.4 NFSv2 clients will sometimes
- report incorrect directory sizes. Workarounds are to
- use NFSv3 or the noac mount option on the NFSv2 client.
-
- +o IRIX 6.5.8 contains security fixes to the fam daemon
- and libfam.a client library; FAM clients are now
- treated as untrusted until they authenticate
- themselves. Earlier versions of the libfam.a client
- library do not perform authentication, so existing
- clients may not receive FAM events for some files. The
- fam daemon has a backwards compatibility mode which can
- be used to disable authentication so that existing
- clients will continue to work, but by default, this
- mode is unused.
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- To help diagnose problems caused by authentication
- disagreements between fam and its clients, a message is
- put in the syslog the first time each unauthenticated
- client has a request denied because of insufficient
- permissions. The message describes the problem and
- refers to the fam(1M) man page, which contains more
- information and instructions.
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